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  • Ecology  (201)
  • Fish culture  (48)
  • Chemistry  (14)
  • Inorganic Chemistry
  • LUNAR AND PLANETARY EXPLORATION
  • NOAA/National Marine Fisheries Service  (144)
  • Lagos (Nigeria)  (105)
  • 1
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    An atlas of reproductive development in rockfishes, genus Sebastes (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  Frank.Morado@noaa.gov | http://aquaticcommons.org/id/eprint/14558 | 403 | 2014-02-21 00:23:40 | 14558 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-28
    Description: The genus Sebastes consists of over 100 fish species, all of which are viviparous and long-lived. Previous studies have presented schemes on the reproductive biology of a single targeted species of the genus Sebastes, but all appear to possess a similar reproductive biology asevidenced by this and other studies. This atlas stages major events during spermatogenesis, oogenesis, and embryogenesis, including atresia, in six species of Sebastes (S. alutus, S. elongatus, S. helvomaculatus, S. polyspinis, S. proriger, and S. zacentrus). Our study suggests that the male reproductive cycle of Sebastes is characterized by 11 phases of testicular development, with 10 stages of sperm development and 1 stage of spermatozoa atresia. Ovarian development was divided into 12 phases, with 10 stages of oocyte development, 1 stage of embryonic development, and 1 stage of oocyte atresia. Embryonic development up to parturition was divided into 33 stages following the research of Yamada and Kusakari (1991). Reproductive development of all six species examined followed the developmental classifications listed above which may apply to all species of Sebastes regardless of the number of broods produced annually. Multiple brooders vary in that not all ova are fertilized and progress to embryos; a proportion of ova are arrested at the pre-vitellogenic stage. Reproductive stage examples shown in this atlas use S. elongates for spermatic development, S. proriger for oocyte development, and S. alutus for embryological development, because opportunistic sampling only permitted complete analysis of each respective developmental phase for those species. The results of this study and the proposed reproductive phases complement the recommended scheme submitted by Brown-Peterson et al. (2011), who call for a standardization of terminology for describing reproductive development of fishes.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
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    Format: 77
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  • 2
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    A guide to the deep-water sponges of the Aleutian Island Archipelago (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  Bob.Stone@noaa.gov | http://aquaticcommons.org/id/eprint/14560 | 403 | 2014-02-21 00:22:19 | 14560 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-28
    Description: The first dedicated collections of deep-water (〉80 m) sponges from the central Aleutian Islands revealed a rich fauna including 28 novel species and geographical range extensions for 53 others. Based on these collections and the published literature, we now confirm the presence of 125 species (or subspecies)of deep-water sponges in the Aleutian Islands. Clearly the deep-water sponge fauna of the Aleutian Islands is extraordinarily rich and largely understudied. Submersible observations revealed that sponges, rather than deep-water corals, are the dominant feature shaping benthic habitats in the region and that they provide important refuge habitat for many species of fish and invertebrates including juvenile rockfish (Sebastes spp.) and king crabs (Lithodes sp). Examination of video footage collected along 127 km of the seafloor further indicate that there are likely hundreds of species still uncollected from the region, and many unknown to science. Furthermore, sponges are extremely fragile and easily damaged by contact with fishing gear. High rates of fishery bycatch clearly indicate a strong interaction between existing fisheries and sponge habitat. Bycatch in fisheries and fisheries-independent surveys can be a major source of information on the location of the sponge fauna, but current monitoring programs are greatly hampered by the inability of deck personnel to identify bycatch. This guide contains detailed species descriptions for 112 sponges collected in Alaska, principally in the central Aleutian Islands. It addresses bycatch identification challenges by providing fisheries observers and scientists with the information necessary to adequately identify sponge fauna. Using that identification data, areas of high abundance can be mapped and the locations of indicator species of vulnerable marine ecosystems can be determined. The guide is also designed for use by scientists making observations of the fauna in situ with submersibles, including remotely operated vehicles and autonomous underwater vehicles.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
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    Format: 187
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  • 3
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    Our living oceans: report on the status of U.S. living marine resources, 6th edition (2021)
    NOAA/National Marine Fisheries Service | Washington, D.C.
    In:  http://aquaticcommons.org/id/eprint/14563 | 403 | 2014-02-19 22:20:21 | 14563 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-28
    Description: The National Marine Fisheries Service (NMFS) is dedicated to the stewardship of living marine resources (LMR’s). This is accomplished through science-based conservation and management, and the promotion of healthy ecosystems. As a steward, NMFS has an obligation to conserve, protect, and manage these resources in a way that ensures their continuation as functioning components of healthy marine ecosystems, affords economic opportunities, and enhances the quality of life for the American public. In addition to its responsibilities within the U.S. Exclusive Economic Zone (EEZ), NMFS plays a supportive and advisory role in the management of LMR’s in the coastal areas under state jurisdiction and provides scientific and policy leadership in the international arena. NMFS also implements international measures for the conservation and management of LMR’s, as appropriate.NMFS receives its stewardship responsibilities under a number of Federal laws. These include the Nation’s primary fisheries law, the Magnuson Fishery Conservation and Management Act. This law was first passed in 1976, later reauthorized as the Magnuson-Stevens Fishery Conservation and Management Act in 1996, and reauthorized again on 12 January 2007 as the Magnuson-Stevens Fishery Conservation and Management Reauthorization Act (MSRA). The MSRA mandates strong action to conserve and manage fishery resources and requires NMFS to end overfishing by 2010 in all U.S. commercial and recreational fisheries, rebuild all overfished stocks, and conserve essential fish habitat.
    Keywords: Ecology ; Fisheries ; Management
    Repository Name: AquaDocs
    Type: monograph
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    Format: 369
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  • 4
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    Age determination manual of the Alaska Fisheries Science Center Age and Growth Program (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  beth.matta@noaa.gov | http://aquaticcommons.org/id/eprint/14559 | 403 | 2014-02-21 00:23:02 | 14559 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-28
    Description: The Age and Growth Program at the Alaska Fisheries Science Center is tasked with providing age data in order to improve the basic understanding of the ecology and fisheries dynamics of Alaskan fish species. The primary focus of the Age and Growth Program is to estimate ages from otoliths and other calcified structures for age-structured modeling of commercially exploited stocks; however, the program has recently expanded its interests to include numerous studies on topics ranging from age estimate validation to the growth and life history of non-target species. Because so many applications rely upon age data and particularly upon assurances as to their accuracy and precision, the Age and Growth Program has developed this practical guide to document the age determination of key groundfish species from Alaskan waters. The main objective of this manual is to describe techniques specific to the age determination of commercially and ecologically important species studied by the Age and Growth Program. The manual also provides general background information on otolith morphology, dissection, and preparation, as well as descriptions of methods used to measure precision andaccuracy of age estimates. This manual is intended not only as a reference for age readers at the AFSC and other laboratories, but also to give insight into the quality of age estimates to scientists who routinely use such data.
    Keywords: Ecology ; Fisheries ; Management
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 97
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  • 5
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    Guide to the identification of larval and early juvenile pricklebacks (Perciformes: Zoarcoidei: Stichaeidae) in the northeastern Pacific Ocean and Bering Sea (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  ann.matarese@noaa.gov | http://aquaticcommons.org/id/eprint/14557 | 403 | 2014-03-10 21:09:22 | 14557 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-28
    Description: Stichaeidae, commonly referred to as pricklebacks, are intertidal and subtidal fishes primarily of the North Pacific Ocean. Broad distribution in relatively inaccessible and undersampled habitats has contributed to a general lack of information about this family. In this study, descriptions of early life history stages are presented for 25 species representing 18 genera of stichaeid fishes from the northeastern Pacific Ocean, Bering Sea, and Arctic Ocean Basin. Six of these species also occur in the North Atlantic Ocean. Larval stages of 16 species are described for the first time. Additional information or illustrations intended to augment previous descriptions are provided for nine species. For most taxa, we present adult and larval distributions, descriptions of morphometric, meristic, and pigmentation characters, and species comparisons, and we provide illustrations for preflexion through postflexion or transformation stages. New counts of meristic features are reported for several species.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
    Format: 96
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  • 6
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    Larval development and identification of the genus Triglops (Scorpaeniformes: Cottidae) (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  Debbie.Blood@noaa.gov | http://aquaticcommons.org/id/eprint/14562 | 403 | 2014-02-21 00:20:54 | 14562 | United States National Marine Fisheries Service
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    Publication Date: 2021-06-28
    Description: Prior to Pietsch’s (1993) revision of the genus Triglops, identification of their larvae was difficult; six species co-occur in the eastern North Pacific Ocean and Bering Sea and three co-occur in the western North Atlantic Ocean. We examined larvae from collections of the Alaska Fisheries Science Center and Atlantic Reference Centre and used updated meristic data, pigment patterns, and morphological characters to identify larvae of Triglops forficatus, T. macellus, T. murrayi, T. nybelini, T. pingeli, and T. scepticus; larvae of T. metopias, T. dorothy, T. jordani, and T. xenostethus have yet to be identified and are thus not included in this paper. Larval Triglops are characterized by a high myomere count (42–54), heavy dorsolateral pigmentation on the gut, and a pointed snout. Among species co-occurring in the eastern North Pacific Ocean, T. forficatus, T. macellus, and T. pingeli larvae are distinguished from each other by meristic counts and presence or absence of a series of postanal ventral melanophores. Triglops scepticus is differentiated from other eastern North Pacific Ocean larvae by having 0–3 postanal ventral melanophores, a large eye, and a large body depth. Among species co-occurring in the western North Atlantic Ocean, T. murrayi and T. pingeli larvae are distinguished from each other by meristic counts (vertebrae, dorsal-fin rays, and anal-fin rays once formed), number of postanal ventral melanophores, and first appearance and size of head spines. Triglops nybelini is distinguished from T. murrayi and T. pingeli by a large eye, pigment on the lateral line and dorsal midline in flexion larvae, and a greater number of dorsal-fin rays and pectoral-fin rays once formed.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
    Format: 43
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  • 7
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    Marine and estuarine ecosystem and habitat classification (2021)
    NOAA/National Marine Fisheries Service | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14565 | 403 | 2014-02-19 22:33:38 | 14565 | United States National Marine Fisheries Service
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    Publication Date: 2021-06-28
    Description: The Ecological Society of America and NOAA's Offices of Habitat Conservation and Protected Resources sponsored a workshop to develop a national marine and estuarine ecosystem classification system. Among the 22 people involved were scientists who had developed various regional classification systems and managers from NOAA and other federal agencies who might ultimately use this system for conservation and management. The objectives were to: (1) review existing global and regional classification systems; (2) develop the framework of a national classification system; and (3) propose a plan to expand the framework into a comprehensive classification system. Although there has been progress in the development of marine classifications in recent years, these have been either regionally focused (e.g., Pacific islands) or restricted to specific habitats (e.g., wetlands; deep seafloor). Participants in the workshop looked for commonalties across existing classification systems and tried to link these using broad scale factors important to ecosystem structure and function.
    Keywords: Conservation ; Ecology ; Policies
    Repository Name: AquaDocs
    Type: monograph
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    Format: 43
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  • 8
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    Marine Fisheries Stock Assessment Improvement Plan: report of the National Marine Fisheries Service National Task Force for Improving Fish Stock Assessments (2021)
    NOAA/National Marine Fisheries Service | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14566 | 403 | 2014-02-20 18:26:54 | 14566 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-28
    Description: This report argues for greatly increased resources in terms of data collection facilities and staff to collect, process, and analyze the data, and to communicate the results, in order for NMFS to fulfill its mandate to conserve and manage marine resources. In fact, the authors of this report had great difficulty defining the "ideal" situation to which fisheries stock assessments and management should aspire. One of the primary objectives of fisheries management is to develop sustainable harvest policies that minimize the risks of overfishing both target species and associated species. This can be achieved in a wide spectrum of ways, ranging between the following two extremes. The first is to implement only simple management measures with correspondingly simple assessment demands, which will usually mean setting fishing mortality targets at relatively low levels in order to reduce the risk of unknowingly overfishing or driving ecosystems towards undesirable system states. The second is to expand existingdata collection and analysis programs to provide an adequateknowledge base that can support higher fishing mortality targets while still ensuring low risk to target and associated species and ecosystems. However, defining "adequate" is difficult, especially when scientists have not even identified all marine species, and information on catches, abundances, and life histories of many target species, and most associated species, is sparse. Increasing calls from the public, stakeholders, and the scientific community to implement ecosystem-based stock assessment and management make it even more difficult to define "adequate," especially when "ecosystem-based management" is itself not well-defined. In attempting to describe the data collection and assessment needs for the latter, the authors took a pragmatic approach, rather than trying to estimate the resources required to develop a knowledge base about the fine-scale detailed distributions, abundances, and associations of all marine species. Thus, the specified resource requirements will not meet the expectations of some stakeholders. In addition, the Stock Assessment Improvement Plan is designed to be complementary to other related plans, and therefore does not duplicate the resource requirements detailed in those plans, except as otherwise noted.
    Keywords: Biology ; Ecology ; Fisheries ; Management
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 140
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  • 9
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    Effects of salinity on larval dimension of Tilapia guineensis (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23422 | 19325 | 2018-04-25 19:24:46 | 23422 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Tilapia guineensis eggs were spawned and hatched in different salinities (17, 12, 7, 5, 2 and 0) ppt. The study was conducted in eight replicates. The aim of the investigation was to ascertain disparity in hatching size of Tilapia guineensis attributable to salinity. Immediately hatching was observed, body weight of five hatchlings in each replicate was individually weighed in milligramme. The individual total length of the five hatchlings was also measured in millimeter. The height of the yolk sac larva was determined with micro-metre screw gauge graduated in millimeter from the top of the yolk sac to the dorsal region of the larva. Data obtained were used to calculate yolk sac volume. Significant differences (P〈0.01) were observed in body weight and total length of larvae hatched in different salinities. The heaviest and longest larvae were hatched in 12 ppt saline water. The yolk sac volume of larvae hatched in lower salinities were significantly higher (P〈0.01) than the yolk sac volume of larvae hatched in higher salinities. The smallest yolk sac volume was recorded in 12ppt saline water. Our findings show that salinity could be manipulated for economic production of heavier seeds of Tilapia.
    Description: Includes:- 5 tables.;6 refs.
    Keywords: Aquaculture ; Chemistry ; Tilapia guineensis ; Nigeria ; brackishwater environment ; Salinity effects ; Larvae
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: 51-55
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  • 10
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    Isolation, identification and prevalence of parasites on Oreochromis niloticus from three selected river systems (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23427 | 19325 | 2018-05-02 08:03:50 | 23427 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The prevailence of protozoan and helminthic parasite species occurring on and in the internal organs of Oreochromis niloticus were studied. Twenty samples of a mixture of adult and juvenile individuals of Oreochromis niloticus were randomly obtained from fishermen landing at the jetties of Epe water side, Ikorodu (Odoguyan) river and a brackish water (makoko), between September and and October, 2009, during a period of low rainfall. Samples were eviscerated and the parasites were excised, identified and each specie of parasites was counted. Most of the parasites encountered were of the Protozoa, manogenea, Digenea, Cestoda and Nematoda groups. The infestation was predominantly by Nematoda species and followed by protozoan species. Protozoan parasites like Trichodina sp and Ichyobodo sp were found to be prevalent, in varying magnitude, in most of the fish samples without clear age discrimination. The study reveals that the prevailence of parasites infestation increases with increasing length, size and age of the fish host and different pars of the fish.
    Description: Includes:- 6 tables.;11 refs.
    Keywords: Ecology ; Fisheries ; Oreochromis niloticus ; Nigeria ; Epe ; Nigeria ; Ikorodu ; Nigeria ; Ogun R. ; freshwater environment ; Parasites ; Identification
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: 78-87
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  • 11
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    Functional roles of mangroves of the Niger Delta to the coastal communities and national economy (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23434 | 19325 | 2018-05-02 08:11:31 | 23434 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Mangrove swamps supply various goods and provide invaluable ecological services, especially as critical habitats for fish breeding. These functions are discussed in the context of rural livelihoods of coastal dwellers in the Niger Delta in particular, and the contribution to national economies in general. The decline in capture fisheries production in Nigeria is partly linked to massive mangrove loss in the Niger Delta. This provides basis for urgent evolution of effective mangrove conservation schemes in the Niger Delta and for focused research on the interaction between the delta mangroves and inland/coastal fish recruitment and production dynamics.
    Description: Includes:- 23 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Mangroves ; brackishwater environment ; Mangroves ; Fishery economics
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
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    Format: 119-123
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  • 12
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    The last standing mangrove forest ecosystem southeast of the Niger Delta (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23437 | 19325 | 2018-05-02 08:15:15 | 23437 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Standing on the abandoned jetty at Iwuochang / Upenekang fishing beach in 1999 [Ibeno LGA, Akwa Ibom State] and looking across the Qua Iboe River [en-route the Atlantic Ocean] were strips of luxuriant mangrove vegetation all around the estuary. Surprisingly, 10 years later still standing on the same jetty and looking across the same River also, all the vegetation round about the estuary are now replaced by nipa palms with pockets of mangrove plants. The fear of the paper is that, there may be crash in fish supply from the coastal waters of Nigeria in the near future. The time to act is now and FISON must be pro-active in this coastal re-construction and re-habilitation. Nigeria’s coastal water is a ‘food-basket’; much should be done to protect and jealously cherish it ? else, it may be the last standing mangrove forest ecosystem southeast of the Niger delta.
    Description: Includes:-14 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Akwa Ibom ; brackishwater environment ; Brackishwater environment ; Mangroves ; Fishery development ; Fishery management ; Mangrove swamps
    Repository Name: AquaDocs
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    Format: 134-137
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  • 13
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    Design and construction of electronic security system for aquaculture water-recirculatory system (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23414 | 19325 | 2018-04-12 09:08:55 | 23414 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Electronic play a vital role in providing security. A security alarm system was designed and constructed to safeguard aquaculture water recirculatory system against illegal entry. The system involved a laser touch which is easily available and it is used for the operation of the device. The laser beam is directed across the entrance to the water recirculatory system, falling on a light dependent resistor (L.D.R). Any unwanted interruption of the laser beam would result into energization of the alarm and indicating security danger. A prototype water recirculatory system was constructed and interfaced with the devices and the device was found efficient and reliable.
    Description: Includes:- 2 tables;1 fig.;4 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Electronic equipment ; Security ; Defence craft ; Fish culture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
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    Format: 6-9
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  • 14
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    Appraising three (3) decades of aquacultural development in Imo state (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23420 | 19325 | 2018-04-25 19:21:06 | 23420 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: A survey was carried out to appraise the level of aquacultural development in the last 30 years in Imo State, South eastern, Nigeria. The study was conducted by the use of questionnaires and visits to fish farms in all the three senatorial zones of the State namely; Okigwe, Orlu and Owerri. Data collected revealed that 79.49% of the farms were owned by individuals while values of 12.82%, 5.13% and 2.56% represents government, community and cooperative ownership respectively. However, 17.95% of ponds were established between 1978-1988 while 46.15% represents fish ponds established between years 1998-2008 . Earthen ponds were commonest with pond areas varying between 400-10,000m2.
    Description: includes:- 8 tables.;6 refs.
    Keywords: Aquaculture ; Nigeria ; Imo state ; freshwater environment ; Aquaculture development ; Fish culture
    Repository Name: AquaDocs
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    Format: 41-44
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  • 15
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    Economics of trickling biological periwinkle shell filter for closed recirculating system (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23417 | 19325 | 2018-04-25 19:14:49 | 23417 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Studies on the economics of trickling biological periwinkle shells filter for closed recirculating catfish system was carried out at the University of Science and Technology, Port Harcourt, Nigeria for 12 weeks. The periwinkle shells biofilter and other recirculating aquaculture system (RAS) components were designed and set up for a pilot catfish production using Clarias gariepinus juveniles at the stocking density of 400 fish/m3. Using fish holding tank volume of 0.21m3, biofilter volume of 1m3, sedimentation tank volume and flow rate of 4.20m3 and 0.78m3/hr respectively, lift pump flow rate of 2.10m3/hr, and an annual production of 3 tons of catfish, a record of all financial expenditures was kept. The financial analyses of the system with periwinkle shells filter and that of imported plastic filter block of same size were prepared. The discounted cash flow projections for the two systems were also prepared. From the discounted cash flows, the economic viability indices for the two systems were computed. The economic analysis compared the profitability index of 1.45 and the payback period of 2.50 years for the system with periwinkle shells filter to the profitability index of 0.60 and payback period of 5.90 years for the imported plastic filter block, and concluded that the system with periwinkle shell filter was cheaper and more cost effective
    Description: Includes:- 5 tables.;10 refs.
    Keywords: Aquaculture ; Nigeria ; Port Harcourt ; Recirculatory aquaculture system ; freshwater environment ; Fish culture ; Cost analysis
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: 22-29
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  • 16
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    Growth performance and nutrient utilization of common carp (Cyprinus carpio and Cyprinus carpio var specularis) fingerlings in New Bussa, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23424 | 19325 | 2018-04-25 19:30:19 | 23424 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: An investigation was carried out into the growth performance and nutrient utilization of common carp fingerlings in New Bussa, Nigeria, at the Hatchery Complex of National Institute of Freshwater Fisheries Research (NIFFR). The Carps were purchased from Jos, and transported to New Bussa, acclimatized for two weeks and stocked in outdoor concrete tanks measuring 2mx2mx1m containing filtered water to the level of 0.5m. Average weight and total length at the time of stocking were 40.80g and 6.30g respectively. The fish were stocked in four treatments, each replicated thrice at varying stocking densities of 3, 6, 9 and 12fish/m2 respectively. The fish were fed 35% crude protein formulated feed at 5% biomass and each daily feed was divided into two equal parts and fed manually by 9.00am and 6.00pm. Quantity of feed adjusted according to weight gain. Biweekly sampling was carried out for a period of 8 weeks, their morphological studies carried out. Weight gain, total length and feed consumed were recorded. Water parameters were monitored every sampling day. The result revealed that there is significant difference (P〈0.05) in all the parameters. The group with 48 (12 fish /m2) density exhibited significantly (P〈0.05) poorest weight gain and there was no significant difference (P〉0.05) between 12 and 24 stocking (3 and 6 fish/m2) densities as far as weight gain is concern. All other parameter; SGR, length, weight gain and feed consumed were also significantly different (P〈0.05). The treatment with 12fish/m2 showed significantly (P〈0.05) poorest feed conversion ratio (FCR). The treatment with stocking of 3 and 6fish/m2 performed best, therefore this stocking range is recommended in this zone. Acquiring of carp from colder region to hotter region is better done in the peak of raining season and to be transferred to earthen pond before hot weather resumes.
    Description: Includes:- 13 refs.
    Keywords: Aquaculture ; Cyprinus carpio ; Cyprinus carpio var specularis ; Nigeria ; New Bussa ; freshwater environment ; Growth rate ; Nutritional requirements ; Feeding experiments ; Fish culture ; Food conversion
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    Growth response and survival of Heterobranchus longifilis cultured at different water levels in outdoor concrete tanks: implications for culture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23425 | 19325 | 2018-04-25 19:31:54 | 23425 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Thirteen-day-old hatchery-raised fry obtained from hormonally-induced spawns of mature African catfish H. longifilis broodstock were introduced to three different water levels (0.35, 0.50 and 0.65 m) in four replicates in 12 units of 2x2x1m3 outdoor concrete tanks. The fry were similarly stocked initially at 50 fry/m2 and later thinned down to 5 fish/m2 and cultured for 6 months. Fish were fed twice daily with commercial pellet feeds (Coppens?) while adjusting the feeding rate from 10 to 4% body weight and pellet size from 0.2 to 4.5 mm. The effects of pond water levels were evaluated in growth responses and survival. Water quality variables were similar (p 〉 0.05) in all compartments. Temperature, dissolved oxygen and pH were at the optimum level for fish. The results reveal significant (P 〈 0.05) treatment effects on growth performances. Fish kept at the highest pond water depth (0.65m) were heavier (P 〈 0.05) and had a higher specific growth rate (P 〈 0.001) than the others. Food conversion ratio and survival rate were unaffected by the experimental treatments. ANOVA revealed significant differences (P〈0.05) with culture period. The lowest water depth (0.35 m) favoured fish growth in the first 3 months while the highest water depth (0.65 m) favoured fish growth from the fourth month upwards (P〈0.05). These results are important because they indicate the optimum water depths for the culture of H. longifilis from fry to sub-adult and from the grow-out/fattening of sub-adult to adult, respectively, in outdoor concrete tanks.
    Description: Includes:- 3 figs.;35 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; Abia State ; freshwater environment ; Fish culture ; Survival ; Feeding experiments
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    Fish hatchery survey in Borno State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23428 | 19325 | 2018-05-02 08:04:53 | 23428 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Aquaculture is regarded as being uniquely placed to reverse declining supplies from capture fisheries and for this to be realized, fish hatchery has a notable role to play. Fish hatchery is the bedrock upon which true and sustainable fish farming can be built. A field survey was conducted in the 3 geo-political zones of the State to look into the number and functionality of fish hatcheries. Results showed that there were about 23 fish hatcheries in the State with the majority concentrated in Maiduguri metropolis. Private ownership (79%) dominated of which 84% were functional. Average annual production is less than 10,000 fingerlings in most hatcheries while the wild sourced fingerlings were used as alternative by the majority. Most hatcheries (62%) made use of concrete tanks for breeding and nursery. All the respondents were of the opinion that the level of patronage was encouraging, though agreed that the level of aquaculture development in the State was low. However, few among the respondents said aquaculture development in the State is on the increase due to low productivity of natural water bodies for the past 10 years. Recommendations were made on how to improve hatchery operation that could help to boost aquaculture development in the State
    Description: Includes:- 3 tables.;3 figs.;5 refs.
    Keywords: Aquaculture ; Nigeria ; Borno State ; Hatchery management ; freshwater environment ; Fish culture ; Freshwater aquaculture
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  • 19
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    Comparative analysis of physicochemical characteristics of ABU and Zaria Dam (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23440 | 19325 | 2018-05-02 08:25:12 | 23440 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physical and chemical parameters of ABU Dam and Zaria Dam were carried out between September and October 2009. The results obtained in the two water bodies were temperature 27.7 0C, pH (7.5 and 7.3), dissolved oxygen (5.8 mg/l and 5.0 mg/l), biochemical oxygen demand (1.74 mg/l and 2. 16 mg/l), alkalinity (58 mg CaC03/l and 49 mgCaCO3/l) P04-P (2.47 mg/l and 1.59 mg/l) NO3-N (3.67 mg/l and 3.47 mg/l), conductivity (54.70 ~ks-1 and 42.48 ~ks-1), total hydrocarbon (TH) (47.66 mg/l) and 48.00 mg/l) and total dissolved solids (32.68 mg/l and 25.35 mg/l) respectively. There was no significant difference in the mean values of the parameters (P〉0.05) except conductivity and total dissolved solids. The water bodies were found to be neutral with high conductivity. All the properties in the water bodies were in conformity with international standards both for drinking and aquatic life.
    Description: Includes:- 2 tables.;7 refs.
    Keywords: Chemistry ; Limnology ; Pollution ; Nigeria ; Zaria Dam ; Nigeria ; ABU Dam ; freshwater environment ; Physicochemical properties ; Pollution
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    Relationship among Tilapia guineensis fingerlings abundance and water quality variations in a brackish water reservoir in Lagos (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23442 | 19325 | 2018-05-02 08:28:15 | 23442 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In recent times there has been an upsurge in the culture of Tilapia in Nigeria resulting in increased demand for the fingerlings which is hardly satisfied. This is due to increasing demand for table size tilapia as food fish and under-sized tilapia in the fish meal and fish canning industries in Nigeria. Collection of Tilapia guineensis fingerlings from the wild, to augment hatchery production, has been the practice and this is subject to environmental fluctuations. Multivariate regression and correlation analyses of accumulated data were used to investigate the effects of changes in water quality parameters on abundance of fingerlings of Tilapia guineensis in a brackishwater habitat in Lagos. Dissolved oxygen (DO), salinity and secchi transparency were found to be the most dominant factors affecting the abundance of Tilapia guineensis fingerlings in the Lagos lagoon. Peak period of abundance was closely associated with period of low salinity (0.50%o to 5.60%o), which coincided with the period of low transparency and low DO in the rainy season. The correlation analyses of Tilapia guineensis fingerlings with the water quality parameters yielded the following correlation coefficients (r)- 0.598; (salinity); -0.644 (transparency); -0.710 (DO); -0.566; (temperature) and 0.129 (pH). The abundance of Tilapia guineensis fingerlings in the Lagoon was ultimately defined by a suitable regression equation. This result is expected to optimize the collection of fingerlings of Tilapia guineensis from the wild and boost food fish security in Nigeria and elsewhere.
    Description: Includes:- 1 table.;1 fig.;( refs.
    Keywords: Chemistry ; Fisheries ; Tilapia guineensis ; Nigeria ; Port Harcourt ; brackishwater environment ; Water quality ; Fingerlings ; Chemical properties ; Physicochemical properties
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  • 21
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    Spatial and temporal variations of physicochemical variables in a small 'pristine' stream in Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23445 | 19325 | 2018-05-02 08:32:33 | 23445 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Spatial and temporal variations of physico-chemical variables of Onu-Iyi ?Ukwu stream were studied for 12 months from March 2005 to February 2006. Three sampling stations were established along the main stream channel from source to mouth. Spatial variation in physico-chemical parameters indicated that total alkalinity, total hardness, conductivity, and nitrate-nitrogen (NO3) recorded their highest values at the upper reaches (with values 14.0mg/l, 88.09mg/l, 17.00~kscmiscm, and 0.60mg/l respectively). Dissolved Oxygen (DO) and pH had their maximum values of 8.20mg/l and 6.94 at the middle reaches. Turbidity, biochemical oxygen demand (BOD), temperature and phosphate-phosphorus (PO4) increased steadily from source to mouth. The observed seasonal variation indicated that wet season values were higher for all the parameters except temperature, turbidity, phosphate-phosphorus (PO4) and total alkalinity although the values were not statistically significant at p〉0.05. The correlation coefficient (r) showed no significant relationships p〈0.05 between physico-chemical parameters except DO and BOD with correlation values of (0.75 and -0.54) respectively.
    Description: includes:- 2 tables.;1 fig.;17 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Onu-Iyi-Uku Stream ; freshwater environment ; Physicochemical properties ; Phosphates ; Phosphorus ; Turbidity
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    A brief examination of the food and biometric features of the grey mullet, Mugil cephalus (Linnaeus) from low brackish / fresh water lagoon (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23452 | 19325 | 2018-05-04 17:37:43 | 23452 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A total number of 166 specimens of Mugil cephalus caught from Epe Lagoon (low brackish/ freshwater) were examined for food and feeding habit and biometric features from November 2006 ? May 2007. The food of the species consisted mainly of algae (Bacillariophyta, Cyanophyta, Chlorophyta and Pyrrophyta) and detritus. The size range of fish examined were 12.4 ? 27.0cm (standard length) while the weight ranged from 22.40 ? 308.00g. The mean values of the biometric characters of Mugil cephalus did not reflect wide variations. The population dominant cohort in the lagoon represents the harvestable and marketable representative for a sustainable fishery and is a strong indication of potential for freshwater culture of this marine species.
    Description: Includes:- 2 tables.;1 fig.;23 refs.
    Keywords: Ecology ; Fisheries ; Mugil cephalus ; Nigeria ; Epe Lagoon ; freshwater environment ; marine environment ; Feeding behaviour ; Food preferences ; Biometrics
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  • 23
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    Limnological studies of Bosso dam and it's tributaries in Minna, Niger State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23449 | 19325 | 2018-05-02 08:39:20 | 23449 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physico-chemical parameters of Bosso Dam were analyzed weekly for a period of six (6) weeks from 29th October, 2009. In all, six (6) stations were identified within the dam. The physico-chemical parameters assessed were: temperature, dissolved oxygen, pH, alkalinity, hardness, conductivity and transparency. The results obtained from the analysis revealed slight variations in most parameters. There was no significant difference p〉0.05 in pH regardless of stations and weeks. But significant difference p〉0.05 were observed in dissolved oxygen, nitrate, temperature, conductivity, hardness, alkalinity, biological oxygen demand, transparency, in respect regard to stations. These variations could be due to influx of organic waste from surface run offs and inorganic waste deposited by man. The physico-chemical parameters observed, indicated that most of them fall with the recommended range or standard by the Federal Ministry of Environment
    Description: Includes:- 2 tables.;10 figs.;18 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Bosso dam ; freshwater environment ; Physicochemical properties ; Chemical properties ; Physical properties ; Water properties
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  • 24
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    Fish diversity in two reservoirs in Southwest Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23458 | 19325 | 2018-05-04 17:48:45 | 23458 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study investigated the fish diversity of Eko ? Ende and Owalla reservoirs, which are within the Osun river system in South West, Nigeria with a view to document biodiversity information needed for conservation and sustainable fisheries. Fish samples were collected monthly from the two reservoirs for one year, using a battery of multifilament gill nets. The data collected from each reservoir was analyzed for fish diversity. Information obtained on the forage / carnivore (F/C) ratio of fishes in each reservoir was used in measuring and comparing the ecological balance of the reservoirs. The results showed that eighteen fish species representing 16 genera and 10 families were identified in Eko ? Ende, while 17 fish species in 15 genera and 10 families were identified in Owalla during the period of study. Sixteen species (representing 84.2% of the total number of fish species) were common to both reservoirs and they were both dominated by Cichlids. Eko ? Ende Reservoir had greater fish diversity than the Owalla Reservoir. Shannon ? Weiner (H') index of fish diversity from Eko ? Ende reservoir was 2.37 while that from Owalla reservoir was 2.10. The forage / carnivore (F/C) ratios of the fishes from the two reservoirs showed that Eko ? Ende reservoir (F/C = 1.98) is ecologically balanced, while Owalla reservoir (F/C = 0.92) is not Owalla reservoir had a higher population of Hemichromis fasciatus (a predatory species). This reservoir also had more intensive fishing activities than the smaller Eko ? Ende reservoir. The study concludes on the need for a participatory research to alleviate the problem of ecological imbalance of fish species in Owalla reservoir.
    Description: Includes:- 4 tables.;28 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Eko-Ende Reservoir ; Nigeria ; Owalla Reservoir ; freshwater environment ; Biodiversity ; Species diversity ; Check lists
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  • 25
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    Evaluation of nutritional composition of waterlily (Nymphaea lotus Linn) from Tatabu-Flood Plain, north central Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23501 | 19325 | 2018-05-07 12:24:04 | 23501 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The proximate composition of leaves, petiole, root, rhizome and seeds of waterlily harvested from Tatabu flood plain/wetlands were determined and analyzed in percentages. Moisture content was highest in the rhizome (20.40 ~C 1.241) while the seeds gave the lowest value of (4.18 ~c 0.176). The highest value for Ash content was observed in the root (27.36 ~C 1.261) and the seeds gave the lowest (2.81 ~c 0.498). Highest value for the Crude fat was obtained from the seeds (9.95 ~c 0.637) whiles the petiole gave the lowest value of (2.27 ~c 0.377). The Crude protein and Crude fibre values were highest in the leaves (19.5 4~c 0.782) and; (15.53 ~c 0.448) while the lowest was obtained in the seeds (3.27 ~c 0.104), (1.60 ~c 0.200) respectively. There was a significant differences among the parts analyzed for the Ash content (p〈0.05). The NFE varied from (31.21 ~c 2.176) to (78.15 ~c 1.418)
    Description: Includes:- 1 table.;19 refs.
    Keywords: Biology ; Ecology ; Nymphaea lotus ; Nigeria ; Tatabu Floodplain ; Proximate composition ; freshwater environment ; Aquatic plants ; Chemical composition ; Chemical properties ; Moisture ; Lipids ; Nutritive value
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  • 26
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    Climate change: implications for fisheries and coastal aquaculture (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23531 | 19325 | 2018-05-09 13:01:07 | 23531 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: A keynote address at the 25th annual conference of the Fisheries Society of Nigeria. The paper presented evidence of climate change in the past and discussed the issue of global warming in the past, present and future. The Greenhouse effects are some of the topics discussed. Discussed in greater detail is the Nigerian situation in the global warming and climate change. The potential impacts on aquaculture has been enumerated. The paper is concluded by given suggestionswhich mitigate the impact of climate change and called on the Federal Ministry of Environment to strengthen research and other arms of government to create a strong synergy to work towards ameliorating the impact of climate change in the country.
    Description: Keynote address at the 25th Annual Conference of the Fisheries Society of Nigeria. Includes:- 2 tables.;6 figs.;6 plates;12 refs.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Climatic changes ; Fisheries ; Aquaculture
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  • 27
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    Growth, survival rate and condition factor of Heteroclarias hatchlings fed cultured Moina micrura, shell free Artemia and combination of both as starter feed (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23503 | 19325 | 2018-05-07 12:27:24 | 23503 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Growth (Percentage weight gain, Specific growth rate , total body length), survival rate and condition factor of Heteroclarias fry fed shell free Artemia, cultured Moina micrura and mixture of both as starter feed were investigated. 30 individual fry were placed in a 4-litre plastic bowl in three treatments of 3 replicates for 25 days in Fish Hatchery. Individual water quality parameters (water pH, temperature, Dissolved oxygen, total Alkalinity and carbon dioxide) monitored for each treatment were not significantly different (p〉0.05) from each Heteroclarias fry fed live M. micrura had the highest percentage weight gain (496.03%), Specific growth rate (3.09), percentage survival rate (88.83%) and condition factor (39.75) but these results were not significant different (P〉0.05) from those of shell free Artemia except those of condition factor. Shell free Artemia and Live M. micrura combination was observed to have the lowest fry Percentage weight gain (428.30%),. specific growth rate(2.54), % survival rate (85.50), condition factor(24.39) and total body length(1.52cm). The highest total body length was observed in shell free Artemia although not significantly different (p〉0.05) from others. The implication of using cultured live M. micrura instead of shell free Artemia as starter diet for Heteroclarias hatchlings at the critical stage of development are discussed
    Description: Includes:- 6 figs.;16 refs.
    Keywords: Aquaculture ; Heteroclarias ; Moina micrura ; Nigeria ; Keffi ; freshwater environment ; Growth rate ; Survival ; Condition factor ; Feeding experiments ; Fish culture
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  • 28
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    Haematological profile of blood of African catfish (Clarias gariepinus, Burchell 1822) fed sunflower and sesame meal based diets (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23506 | 19325 | 2018-05-07 12:32:20 | 23506 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of substituting soybean meal with raw sunflower and sesame seed meal was evaluated using haematological indices of Clarias gariepinus fed the diets containing sunflower and sesame seed meal. Seven isonitrogeneous and isocaloric diets containing sunflower and sesame seed meal replacing soybean meal at a rate of 15, 30 and 45% were prepared. A diet without replacement of soybean meal served as control. The result of fish fed test diets showed significant (P〈0.05) difference over the fish fed control diet with respect to PCV and mean corpuscular volume (MCV). Fish fed control diet had the lowest Hb, PCV, WBC, RBC, MCV, MCHC, ESr. There was no significant difference (P〉0.05) in the fish fed control diet and test diets with respect to MCH, MCHC, ESr, Neutrophil, Monocytes, Eusinophils and Lymphocytes. Hence it can be concluded that the haemotological parameter of Clarias gariepinus is not significantly (P〉0.05) changed with increase dietary inclusion of raw sunflower and sesame seed meal.
    Description: Includes:- 4 tables.;22 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Akure ; freshwater environment ; Feeding experiments ; Fish culture ; Diets ; Nutritional requirements ; Haematology
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  • 29
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    Growth response of Clarias gariepinus (Burchell 1822) juveniles fed diets containing raw Mucuna utilis seed meal (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23505 | 19325 | 2018-05-07 12:31:00 | 23505 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Feeding trial was conducted in static water to assess the growth of Clarias gariepinus fingerlings fed different inclusion levels of Mucuna seed meal (MSM). Raw MSM was used at 10%, 20% and 30% inclusion levels and the performance of fish fed these diets was compared with the fish fed soybean-based diet which contained 40%protein. All diets were prepared to be isonitrogenous and isocaloric. A four by six factorial experiment with three replicates using ten fish each of average initial weight of 6.6g was carried out. Daily fish ration of five percent body weight was administered two times for twelve weeks. The specific growth rate (SGR) in diet 1 (control) was significantly (p〈0.05) higher than the other dietary groups and worsens as inclusion level increased similar trend was also observed in the food conversion ratio (FCR) and protein efficiency ratio (PER). The significantly lower growth performance of fish fed diets containing raw MSM might be due to the presence of anti-nutritional factors present raw MSM. The possibility of improving this trend through processing should be investigated.
    Description: Includes:- 3 tables.;14 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Osogbo ; freshwater environment ; Feeding experiments ; Fish culture ; Diets ; Growth rate
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    Growth of Clarias gariepinus juveniles fed five commercial feed (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23504 | 19325 | 2018-05-07 12:29:55 | 23504 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Clarias gariepinus juveniles 6.35 ~C 0.22 g weight were fed five different commercial diets for 105 days to determine growth rates. Diets were hand distributed in triplicate groups of 30 fish once daily. The diets used were Coppens, Multifeed, Eurogold, Vittal and Ajanla feeds. At the end of the experiment, the final mean weight for Coppens, Multifeed and Eurogold were 181.54 ~c 0.63 g, 179.92 ~c 0.95 g and 139.92 ~c 0.26 g respectively, while final mean weight for Vital and Ajanla were 110.11 ~c 0.23 g and 119.03 ~c 0.35 g respectively. The statistical analysis of the results showed that there were significant differences (P〈0.05) in the mean final weights. Also there was no significant difference (P〉0.05) in the mean final weight between Coppens and Multifeed. The specific growth rates (SGR) were 3.19% day-1 3.18 % day-1 and 2.94% day-1 for Coppens Multifeed and Eurogold respectively and 2.71% day-1 and 2.78% day-1 respectively for Ajanla and Vital. There were significant differences (P〈0.05) in SGR among treatments and no significant difference (P〉0.05) between SGR of Coppens and Multifeed. Based on these findings, it was concluded that feed with macronutrient combinations of 45% CP, 12% crude fat, crude fiber, 1.5%, Ash 9.5% promoted better growth rates in C. gariepinus juveniles as compared with other combinations.
    Description: Includes:- 2 tables.;21 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeriaa ; Port harcourt ; Feed trial ; Feed evaluation ; freshwater environment ; Feeding experiments ; Fish culture ; Feed efficiency ; Feed
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    Effects of replacement of fishmeal with palm grub (Oryctes rhinoceros Linnaeus, 1758) meal on the growth of Clarias gariepinus (Burchell, 1822) and Heterobranchus longifilis (Valenciennes, 1840) fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23510 | 19325 | 2018-05-05 13:09:20 | 23510 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Clarias gariepinus (0.73 ~c 0.01g) and Heterobranchus longifilis fingerlings (0.67 ~c 0.01g) were fed five isonitrogenous diets of about 40% crude protein, with varying levels (0-100%) of palm grub meal for 12 weeks. At the end of the study, C. gariepinus and H. longifilis fingerlings fed 25% palm grub inclusion diet had the highest weight gain (5.30g and 4.05g respectively), relative (726.0% and 595.6%) and specific (1.09% and 1.00%) growth rates while those fed 100% palm grub inclusion diet showed least growth; weight gain (2.68g and 2.15g), relative (367.1% and 316.2%) and specific (0.80% and 0.45%) growth rates respectively. Food conversion and protein efficiency were also best in fingerlings fed 25% palm grub meal diet (0.70 and 1.35 for C. gariepinus; 0.75 and 1.35 for H. longifilis respectively) with decreasing efficiency as palm grub inclusion level increased in the diets. The differences in the growth and nutrient utilization of the fingerlings on the various diets were generally insignificant (p〉0.05) above 25% inclusion level of palm grub. The study showed that palm grub can be used to completely replace fish meal in mudcatfish diets. However, for optimal growth and nutrient utilization, 25% level of replacement of fish meal with palm grub meal is most adequate in C. gariepinus and H. longifilis fingerlings diets.
    Description: Includes:- 7 tables.;2 figs.;12 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Heterobranchus longifilis ; Oryctes rhinoceros ; Nigeria ; Ibadan ; freshwater environment ; Feeding experiments ; Growth rate ; Fish culture ; Diets
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    Length-weight relationship and condition factor of two Hydrocynus species in Lake Kainji, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23520 | 19325 | 2018-05-08 15:51:20 | 23520 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In the study and understanding of fish biology, characterization and morphology, the length-weight relationship is of great importance. The genus Hydrocynus, is of high economic importance to the fisheries of Lake Kainji. This study investigated their length-weight relationship to establish the growth pattern of species within this genus. The ‘b’ values of the length-weight relationship for these species are less than 3. There was negative allometric growth (b〈3) for all samples of the Hydrocynus species. The correlation coefficients (r) are 0.9713 and 0.9888, for Hydrocynus forskali and H.brevis respectively. Condition factors ranged from 1.313 for H. forskali to 1.431 for H. brevis.
    Description: Includes:- 2tables.;2 figs.;27 refs.
    Keywords: Ecology ; Fisheries ; Hydrocynus forskalii ; Hydrocynus brevis ; Nigeria ; Kainji L. ; freshwater environment ; Length-weight relationships ; Condition factor
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    Privatization: a policy to transform and increase the production capacity of fish in Nigeria fish industries (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23524 | 19325 | 2018-05-09 12:30:42 | 23524 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Over 200 hatcheries of fish exist in Nigeria with at least two hatcheries in each state of the federation but unfortunately over 50 percent are either non-functional or function far below their optimum production capacities. Also about 85 percent of the non-functional hatcheries belong to the government (-either federal, state, local government or institution). The associated problems with the non-functional hatcheries include: inadequate funding, poor maintenance of hatcheries facilities, high cost of feed inputs, in adequate infrastructure, differential growth and cannibalism in catfishes which result in poor fingerling harvest, low attitude and lack of commitment to government work. Privatization/ownership options are considered the best options for this paper and clues to solve the problems mentioned above through privatization are presented. Problems with privatization and private investment are also discussed. It was advised that in case the existing hatcheries are put in to full production, the national demand for fingerlings which is placed at 4.3 billion annually could be met with ease. Fingerlings production in the hatchery as the quickest revenue yielding aspect of fish farming (with high internal rate of returns and short pay back period) capable of attracting revenue within 2-3 mouths of a breeding exercise are emphasized.
    Description: Includes:- 10 refs.
    Keywords: Aquaculture ; Nigeria ; Privatization ; Hatchery ; freshwater environment ; Hatcheries ; Seed production ; Fish culture ; Fishery development ; Development projects
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    The rise of peri-urban aquaculture in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23533 | 19325 | 2018-05-10 09:40:52 | 23533 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper traced aquacultural development in Nigeria to the colonial period in 1950s with fish farming in tilapias during which more than 200 small scale subsistence level ponds were built with some growth continuing in the rural areas. There was a bloom in farming of catfishes in 2000. The interest shown by private fish farmers has been identified as a propelling factor for aquacultural development in Nigeria. The development of private fish hatcheries has been another factor leading to the growth of aquaculture. The paper noted that social capital and its development either directly or indirectly can be identified as contributing to the success of the sectors. The increasing profit from aquaculture has led to fish farmers increasing beyond 5000 tonnes in 2009. The paper highlighted the numerous advantages which led to the expansion of the industry in Nigerian villages.
    Description: FISON EKO 2010: Invited paper. Pagination on document pp. 1-15 Include:- 1 table.;16 figs.;14 refs.
    Keywords: Aquaculture ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Aquaculture ; Fish culture ; Aquaculture development
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    Format: 114-128
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    Effect of imported feed and local feed on growth performance of tilapia (Oreochromis niloticus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24170 | 19325 | 2018-05-13 18:50:52 | 24170 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A number of 60 Juveniles of Oreochromis niloticus were stocked and divided into two plastic ponds of 0.90m by 0.60 in dimension respectively with initial total weight of 120g.The juveniles were two months and half old as at the time of collection and they were fed with 4mm of the feeds. Each pond contains thirty Oreochomis niloticus which were fed with local feeds, and coppens feed. After weighing the fishes in the two ponds, there was significant difference in the average weight and length, in which the pond that was fed with coppens has the highest average weight and length of 140g and 15.62cm respectively. The quality of the water was checked by measuring pH, dissolved oxygen and temperature of the water using water aquaculture kit. Model: FF-1 A.CAT No. 2430-0. The mortality rate was 0%, while the survivability rate was 100%.
    Description: Includes: 2 tables.;Also includes: 5 references.
    Keywords: Aquaculture ; Ecology ; Oreochromis niloticus ; Nigeria ; Lagos ; freshwater environment ; Feed ; Freshwater fish ; Growth rate ; Length-weight relationships ; Pond culture ; Water quality ; Artificial feeding ; Feeding experiments ; Fish culture ; Survival ; Mortality
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    Design of pumping station for a tidal fish farm in Niger Delta, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24173 | 19325 | 2018-05-13 18:55:18 | 24173 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The design of pumping station for submersible FLYGT pump 3102 version LL to redress the water supply problem of some ponds in the tidal fish farm of African Regional Aquaculture Centre (ARAC) located in Omuihuechi, Aluu, Rivers State, Nigeria was carried out. Prior to the design baseline study was carried out for the proper sitting of the pumping station. The topographic survey of the area indicated gentle sloping woodland, with the highest and lowest elevations of 11.00 m and 1.00 m respectively. The mean peak heights of water in the supply canal during spring and neap tides ranged from 0.95 to 1.45 m and 0.38 to 0.86 m respectively. The flood tide and ebb tide velocities of supply canal water flow varied from 0.40 to 0.75 m/s and 0.75 to 0.92 m/s respectively. Soil particle size analysis indicated loamy clay and clay soils. The results of pumping station design were 1.80 m (length), 1.30 m (width); 3.60 m (height),0.15 m (thickness), I (cement) : 2 (sand) : 4 (gravel) (concrete mixture ratio) and 12 mm (reinforcement bar). Results of pump characteristic calculation were 0.069 m〈sup〉3〈/sup〉/s (discharge) ,4.02 m/s (pumping velocity), 5.73 m (total dynamic head), 0.82 m (minimum submergence depth), 5.04 KW (pump power)and 0.40 and 0.30 m ( clearances from floor and wall respectively). The results obtained were considered adequate for the purpose of construction of the pumping station for the pump and the procedures adopted will assist in similar design tasks in the development of fish farms in the Niger Delta Region of Nigeria and beyond.
    Description: Includes: 4 tables and 4 figures.;Also includes: 20 references.
    Keywords: Aquaculture ; Limnology ; Nigeria ; Niger Delta ; freshwater environment ; Fish culture ; Pump stations ; Tidal inlets ; Fish ponds ; Construction ; Construction materials ; Design ; Topography ; Soils ; Water pumps ; Aquaculture equipment
    Repository Name: AquaDocs
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    The use of hapa as an improved system for culturing of Clarias gariepinus fry (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24176 | 19325 | 2018-05-13 18:59:45 | 24176 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fry management in aerated and non aerated aquarium and hapa system were determined in Fish Hatchery of Faculty of Agriculture, Shabu Lafia to assess condition factor, percentage survival rate, total body length and percentage weight gain. 200 hatchlings of Clarias.gariepinus fry were put into a 35 x 30 x 15cm aquarium with aerator and without aerator; hapa with aerator and hapa without aerator in 3 replicates. The hapas were made of brown colour plankton net. The fry were fed with 5% of their body weight with Artemia shell free four times daily for the period of sixteen days. Temperature(27.45 ~c 0.05~'C), pH (7.56 ~c 0.03); Dissolved oxygen (8.20 ~c 0.03 mg/L), total alkalinity (l5.36~c 0.03 mg/L) and Free carbon dioxide (4.30 ~c 0.03 mg/L) monitored in each of water quality parameter of the various treatments was not significantly different from each other. The Percentage weight gain (1117 and 1067), percentage survival rate (92.83 and 91.33), total body length(l.07 and 1.07cm) and condition factor (11.99 and 11.44) of C. gariepinus fry in hapa system (aerated and non aerated respectively) are significantly(p〈0.05) higher than those of aquarium in the study although they are not significantly different (P〉0.05) from each other. The use of hapa as an improved system for mass production of C. gariepinus fry is highly recommendable in the large body of water.
    Description: Includes: 1 table and 4 figure.;Also include: 7 references.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Nasarawa State ; Aquarium ; Aerator ; Fry ; Hatchlings ; Hapa ; Hapa ; freshwater environment ; Fish culture ; Freshwater fish ; Fry ; Hatcheries ; Condition factor ; Survival ; Length-weight relationships ; Aquaculture techniques ; Comparative studies ; Cage culture
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    Aquaponics: a new trend in food production (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24175 | 19325 | 2018-05-13 18:58:18 | 24175 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The increase in population coupled with current and escalating extent of soil degradation, water scarcity and climate-related challenges plaguing agricultural productivity in every corner of the world and particularly in Nigeria demands for alternative food techniques, one of them called aquaponics. This paper highlights a new trend in food production techniques for the production of fish and vegetable crops in aquaponics. Aquaponics is experiencing renewed interest worldwide with many small home growers and large operations employing the process as a means of producing sustainable fish and plant crops. The design of this scalable farming system closely mirrors that of recirculating systems in general, with the addition of a hydroponic component and the possible elimination of a separate biofilter and devices for removing fine and dissolved solids. The benefits of aquaponics includes conservation of water resources and plant nutrients, intensive production of fish and reduced operating costs relative to either system in isolation. Aquaponics, without doubt is a practice that is receiving considerable interest due to an ever increasing need for fresh wholesome food and sustainable eco-friendly agricultural practices.
    Description: Includes: 3 figures.;Also includes: 12 references.
    Keywords: Aquaculture ; Nigeria ; Ibadan ; Aquaculture ; Hydroponics ; Recirculating system ; Sustainable ecosystem ; Natural fertilizer ; Aquaponics ; freshwater environment ; Plant culture ; Sustainable development ; Environmental impact ; Food security ; Aquaculture development ; Organic fertilizers ; Recirculating systems ; Agropisciculture ; Water resources ; Conservation ; Aquaculture techniques ; Fish culture
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    The status of fish genetics and breeding towards sustainable aquaculture in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24202 | 19325 | 2018-05-16 15:26:01 | 24202 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper, fish genetics and breeding in Nigeria addresses the application of genetics and breeding to fish farming with the view to enhanced aquaculture production in Nigeria. This production technique is not limited to the use of conventional breeding programs nor is it necessary to go through the basic developmental steps of selection and isolation that lead to the domestication and diversification of livestock and crops over thousands of years. With modern molecular genetic techniques and induced breeding, it is now possible to develop and create new fish species .
    Description: Includes: 12 references
    Keywords: Aquaculture ; Nigeria ; Delta State ; freshwater environment ; Genetics ; Sustainability ; Induced breeding ; Biotechnology ; Seed (aquaculture) ; Aquaculture techniques ; Fish culture
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    The role of biotechnology in aquaculture and fisheries development (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24204 | 19325 | 2018-05-16 15:29:46 | 24204 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Biotechnology per se is not a panacea for the world's problems of hunger and poverty. However, genetic engineering in particular, offers outstanding potentials to increase the efficiency of animal improvement. Thus, biotechnology could enhance global food production and availability in a sustainable way. Case studies from Egypt and India also demonstrate that highly immune genetically modified fishes, transgenic fishes, chromosome engineering and gene banking are very appropriate for fish farmers and consumers in developing countries. As the entire technology can be packaged into the germ cells of fish, it can easily be integrated into traditional small-holder fish farming systems. Except for a few innovative transfer projects, though, the application of biotechnology until now remains concentrated in the industrialized world. Combined with insufficient own scientific and regulatory capacities, the increasing privatization of international aquacultural and fisheries research and the strengthening of intellectual property rights complicate the access of developing countries to biotechnology. Profound constitutional adjustments are therefore essential to ensure that biotechnology does not bypass the poor.
    Description: Includes: 15 references.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; Ebonyi State ; freshwater environment ; Biotechnology ; Sustainability ; Genetically modified organisms ; Gene banks ; Fish culture ; Aquaculture development ; Food security
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    Food and habits of the Batrachoid, Batrachoides liberiensis off the Qua Iboe River estuary, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24223 | 19325 | 2018-05-19 07:09:15 | 24223 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: We studied the trophic attributes of the toadfish, Batrachoides liberiensis off the Qua Iboe River estuary Nigeria, between August 2008 and July 2009. The fish species has no well defined stomach; the intestine was used as gut. Gut contents analysis of 360 specimens of the toad fish revealed that 11 food items (Penaeus notialis, Sersama alberti, crayfish remains, unid fish, fish bones, fish remains, unid gastropod, insect remains unid clam and sand grains)] were ingested. The food items were re-assigned into 6 major ecological categories based on food ponderal index (%FPI): Pisces (FPI= 35.33%), Crustacea (FPI= 20.73%), unid Gastropoda (FPI=14.32%), Mollusca (FPI= 12.48%), Insecta (FPI= 11.64%) and FPI of 5.50% sand grains. Males were significantly higher in feeding intensity (Average gut fullness, AGF: t = 2.083, 358 df, P〈0.05) vis-a-vis the females. There were similarity in rank-order of the seasonal dietaries (spearman-rank correlation: rs = 0.871, P〈0.02). Sex ratio was male-biased. B. liberiensis in the Qua Iboe estuary is carnivorous, exhibiting affinity to piscine as major dietaries.
    Description: Includes: 11 references.
    Keywords: Ecology ; Fisheries ; Batrachoides liberiensis ; ASE ; Nigeria ; Iboe River. ; Batrachoides liberiensis ; Qua Iboe River Estuary ; Nigeria ; Trophic attributes ; brackishwater environment ; Food ; Feeding ; Stomach content ; Food consumption ; Artisanal fishing ; Fishery surveys ; Food composition ; Food preferences ; Brackishwater fish
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    Trophic ecology of fishes: consolidating the basic (traditional) methods (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24226 | 19325 | 2018-05-19 07:15:01 | 24226 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-15
    Description: Studies of food and feeding ecology are important to investigate trophic interrelationships of fishes in their resident water bodies. These are usually achieved using various important methods. However because no single measure gives an overall representation of the feeding habits of fish, best results are achieved only when methods are used to complement one another. This paper reviews various methods used in studying trophic fish ecology and suggests consolidation of the traditional or basic methods with relevant statistical indices and local ecological knowledge. More advanced methods are also proposed as valuable tools because they compensate for some possible errors that may arise from the use of quantitative methods.
    Description: Includes: 28 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Oyo State ; freshwater environment ; Ecosystems ; Trophic levels ; Interspecific relationships ; Trophic relationships ; Food ; Ecology ; Consolidation ; Methodology ; Feeding behaviour ; Stomach content ; Food webs ; Statistical analysis ; Fish culture
    Repository Name: AquaDocs
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    Reproductive efficiency as a function of age in estuarine catfish, Chrysichthys nigrodigitatus of the Cross River, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24206 | 19325 | 2018-05-16 15:35:04 | 24206 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Study was conducted on the reproductive efficiency of Chrysichthys nigrodigitatus of the Cross River. The objective was to determine the influence of age on eggs size and fecundity. Forty four females of Chrysichthys nigrodigitatus were sampled from April, 2011 to March, 2012. Fecundity and eggs size were measured in relation to fish size. The relationship between egg size and fish size produced a parabolic curve. This implies that younger fish and older fish were less efficient in terms of eggs size and quality while the middle aged fishes were more efficient in terms of eggs size and quality. Similarly, there was an inverse curvilinear relationship between number of eggs per unit weight and somatic weight of the fish. Younger fish are less efficient because of the physiology of growth, while the older fishes are less efficient because of reproductive senescence. Management strategy for the stock therefore requires the conservation of the middle aged individuals for increase in reproduction. Also in aquaculture the middle aged class should be used as broodstock for excellent results.
    Description: Includes: 2 figures.;Also includes: 13 references.
    Keywords: Ecology ; Fisheries ; Chrysichthys nigrodigitatus ; Nigeria ; Cross River ; Brackishwater fish ; Reproduction ; Efficiency ; Biological age ; Eggs ; Fecundity ; Size ; Food fish
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    Length-weight relationships and relative condition factor of twenty important marine fish species off Lagos coast, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24203 | 19325 | 2018-05-16 15:28:10 | 24203 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted on the length-weight relationship and condition factor (k) of 6,254 fish samples representing 20 species belonging to 11 families of important marine fishes off Lagos coast, Nigeria. They were collected with a trawl net (cod-end 20mm mesh size), trawled at different depth ranging from 10m-100m between May and June 2009. The estimated 'b' value (regression coefficient) of the equation W = aLb ranged between 2.29 and 3.46 with mean and mode values of 2.78 ~c 0.28 and 2.79 respectively while the 'a' value (regression constant) ranged between -2.6019 and -0.9023 with mean value of -1.6899 ~c 0.40. The condition factor (k) ranged between 0.52 and 11.89 with mean values of 2.71 ~c 2.64. Fish species of Nigeria coastal water are dominated by Pseudotolithus senegalensis which is about 13.4% of the total fish samples and their growth trend is mostly isometric (exhibit dimensional equality of the body parameters). All the species studied are in good condition (k〉 0.5).
    Description: Includes: 1 table and 5 figures.;Also includes: 20 references.
    Keywords: Ecology ; Fisheries ; Pseudotolithus senegalensis ; ASE ; Nigeria ; Lagos Lagoon ; Lenght-weight relationship ; Condition factor ; Marine fish species ; Trawl ; Isometric ; Nigeria ; freshwater environment ; Length-weight relationships ; Condition factor ; Marine fish ; Trawl nets ; Coastal waters ; Fishery surveys ; Marine fisheries ; Check lists ; Population structure ; Dominant species
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    Toxicity of unripe Ackee apple (Blighiasapida) fruit extract on Clarias gariepinus fingerlings (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24201 | 19325 | 2018-05-16 15:24:45 | 24201 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was conducted to determine the toxicity of unripe Ackee apple (Blighiasapida) fruit extract on catfish, Clarias gariepinus fingerlings using the 96-hour bioassay under laboratory condition. The LC50 was determined graphically as 3.00ppt. Mean mortality was 0, 40, 50, 70 and 80% in the concentrations of 0, 3.33, 3.47,3.60 and 3.73ppt. Statistical analysis of the results showed that there were significant differences (P〈0.05) on the effect of concentration. Mortality increased with increase in concentration of toxicant and duration of exposure. Clarias gariepinus showed erratic swimming pattern, loss of reflex which increased with increase in concentration. Histopathological changes were revealed in the gills, skin and heart of the fish. The gill structure was altered and there were moderate mucosal erosion. There were several lymphoid aggregations with fibrous connective tissue at the dermal and epidermal areas in the skin. The heart myofibre were diffusely disintegrated with edema between bundles.
    Description: Includes: 1 table and 7 plates.;Also includes: 8 references.
    Keywords: Health ; Aquaculture ; Clarias gariepinus ; Nigeria ; Ado-Ekiti ; Fruit Extract ; freshwater environment ; Toxicity ; Artificial feeding ; Food composition ; Chemical composition ; Histopathology ; Freshwater fish ; Fingerlings ; Toxicants ; Mortality ; Fish culture ; Controlled conditions ; Lethal limits
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    Physico-chemical parameters of fish ponds as it affects fish production in Ado-Ekiti, Ekiti State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24590 | 19325 | 2018-05-20 16:05:58 | 24590 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The water analysis of five selected ponds in Ado-Ekiti in Ekiti State, was carried out to determine their suitability for fish culture. Pa rameters analyzed were: Temperature, Turbidity, Carbon (IV) oxide, Alkalinity, Hardness, pH and Dissolved oxygen. Values for temperature ranged between 20.0~'C and 29.0~'C, Turbidity values were between 46.0-50.2cm, Carbon (IV) oxide: 11.5-12.2mg/litre; alkalinity: 100-120mg/liter; hardness: 110-200mg/litre; pH: 6.8-7.8 and dissolved oxygen: 5.8-6.8mg/liter. The values obtained were found to be within acceptable range for fish production.
    Description: Includes: 10 references.
    Keywords: Aquaculture ; Chemistry ; Nigeria ; Physico-chemical parameter ; Fish pond ; Ado-Ekiti ; Fish production ; freshwater environment ; automation
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    Assessment of chemical and nutrient characteristics of selected wetland waters and sediments in Bo - Moyamba districts, southern Sierra Leone (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24617 | 19325 | 2018-05-22 06:09:58 | 24617 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The impact of anthropogenic activities on chemical and nutrient characteristics of selected wetlands in Moyamba and Bo districts was investigated. Water and sediments samples for nutrient and trace metal analysis were collected for two seasons (wet and dry) at sampling sites. Anthropogenic activities such as industrial effuent, domestic and agricultural waste disposal constitute major sources of wetland pollution in the selected districts. Samples of water and soil were analyzed for metals (Cr, Co, Cd, Ni, Pb, Mg, Mn, Fe, C1 and Zn) and nutrients (Ca, K, P and Na) levels were determined and their seasonal variations were compared at (p〉0.05) significant levels. Physico-chemical parameters such as Temperature, Dissolved oxygen, Ammonia, Nitrate, pH, general hardness, total alkalinity were also measured. Fe was the most concentrated metal in water (mean range 15.93 ~c 1.51 to 33.65 ~c 7.79mg/l) and in sediment (15748 ~c 3526 to 107702 ~c 84038 mg/1), while Cr and Mg were the least concentrated (0.34 ~c 0.14 to 0.53 ~c 0.09mg/l) and (0.07 ~c 0.01 to 0.22 ~c 08 mg/1) respectively. Generally, trace meta levels in sediment of the study area were relatively higher than tht concentration in water. Na was the most concentrated nutrient in both water and sediment, while calcium has the least. Calcium plays an important role in blood clotting, muscular contractions and in some enzymatic processes and as such its level in the studied wetland must be augmented. Accumulations of metals in the environmental matrices are ecologically undesirable as they pose threats to man who is the end user of the values of wetland ecosystems and consequently the need for policy intervention in the effective management of both domestic and industrial wastes.
    Description: Includes: 33 references.
    Keywords: Ecology ; Limnology ; Nigeria ; Trace metals ; Nutrient ; Physico-chemical ; Wetland ; Enthropogenic ; Policy intervention ; freshwater environment ; automation
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    Observation on the sex ratio, fecundity, egg size and gonadosomatic index of grey mullet (Mugil cephalus) from high brackish tropical lagoon (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24627 | 19325 | 2018-05-22 06:26:49 | 24627 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The 2661 specimens of the striped mullet, Mugil cephalus L. used for this study, were collected from high brackish lagoon in southwest Nigeria for 24 months. The size of the 2661 specimens of M. cephalus used for this study ranged from 1.7- 29.5cm standard length (total lenght 1.9 to 39.0cm). The sex ratio for M. cephalus was 1:0.53 and this showed a statistically significant (p〈0.05) dominance of the male over the females for the size range. The fecundity estimates varied from 635,568- 1,520,185 and was positively correlated to the fish and weight. Oocyte diameter averaged 409.64 ~c 40.67pm and this is indicative of an early stage of gonad maturation of the specimens in the lagoon before final spawning occurred. The GSI indicated that spawning activity occurred from December to May in the open ocean.
    Description: Includes: 28 references.
    Keywords: Ecology ; Fisheries ; Mugil cephalus ; ASE ; Nigeria ; Lagos Lagoon ; Mature ; Spawning ; Specimen ; Male ; Female ; brackishwater environment ; automation
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  • 49
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    Growth pattern and specificity of attachment of lagoon crab (Callinectes amnicola) fouled with barnacles (Chelonibia patula) from Lagos Lagoon, Southwest Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24635 | 19325 | 2018-05-23 07:59:06 | 24635 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The growth pattern and condition factor (K) of 810 Lagoon crabs (Callinectes amnicola) fouled with Barnacles (Chelonibia patula), collected from Makoko Jetty, off Lagos Lagoon between April-September 2011 were studied. The carapace length f C. amnicola examined ranged from 3.8cm-8.6cm while the carapare width ranged from 9.5cm-15.4cm. The total weight ranged from 53.1g to 165.0g, indicating that increase in length correspond to increase in weight, thereby suggested that C. amnicola from Lagos Lagoon exhibited a negative allometric growth. The correlated coefficient 'r' for the crabs was 0.68, showing a low correlation between carapace length weight in the lagoon crabs fouled with barnacles. The condition factor (K) values of C. amnicola fouled with barnacles ranged from 3.2-9.7 with a mean value of 5.4. The highest K-value was recorded for the size group 3.5-4.4. The value decreased with increased length of C. ammcola. The sex ratio (1:80) indicated that there were more females (98.8%) than males (1.2%), 12 (1.5%) of the 810 lagoon crabs examined were heavily fouled with barnacles distributed all over the points of attachment with the cora having the most attachment (91.6 6%). Average diameter of the barnacles attached to the crabs ranged from 0.23cm to 1.85cm. The distribution shows that large-sized crabs had much banacles attached to them than small-sized crabs, with greater barnacles found in the females than in the males.
    Description: Includes: 25 references.
    Keywords: Ecology ; Fisheries ; Callinectes amnicola ; Chelonibia patula ; Nigeria ; Lagos Lagoon ; Callinectes amnicola ; Specificity ; Lagoon ; Condition factor ; Sex ratio ; freshwater environment ; automation
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  • 50
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    The identity of Schilbe intermedius in Jebba Lake, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24630 | 19325 | 2018-05-22 06:31:54 | 24630 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study attempts to ascertain the identity of Schilbe intermedius (Family: Schilbeidae) in Jebba Lake using quantitative (mophometric and meristic) and qualitative (colour and shape) parameters that makes identification easier. One hundred (100) specimens were collected and used for the study. There was relationship between body weight and length of fish (a=0.039, b=2.332, r=5.96). The parameters are similar to description of other authors. There is also absence of adipose fin found in the species, which is due to the geographical location.
    Description: Includes: 14 references.
    Keywords: Ecology ; Fisheries ; Schilbe ; intermedius ; Nigeria ; Jebba Lake ; Morphometric ; Meristic ; Butterffish ; Jebba Lake ; freshwater environment ; automation
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  • 51
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    Growth performance of Clarias gariepinus fingerlings fed diets with graded levels of yeast (Saccharomyces cerevisiae) used as a floater additive in concrete tanks (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24159 | 19325 | 2018-05-13 13:04:38 | 24159 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Completely randomized design with duplicate groups were used to study the growth performance of 400 fingerlings of Clarias gariepinus in 2m x 2m x 1m concrete tanks in an out-door hatchery complex of National Institute for Freshwater Fisheries Research (NIFFR), New Bussa, Niger State, Nigeria. Graded levels (0, 1,2,3 or 4) % of yeast (Saccharomyces cerevisiae) was included into a 40% crude protein (C.P) NIFFR floating basal diet and fed to Clarias gariepinus in tanks for 16 weeks and 35% in the last 4 weeks. This was to determine the optimum level of supplemental yeast inclusion as a floater additive into diets of C. gariepinus and to quantify feed and its cost for raising a kilogram of the fish fed diets. The experiment was geared towards development of cost effective standard floating feed for Clarias gariepinus. There was no significant difference in weight gain (WG), feed consumed (FC), specific growth rate (SGR), survival, cost of feed consumed (CFC) and palatability test of flesh (P〉0.05) except FCR (P〈0.05) and feed cost per kilogram of fish (P〈0.05) at the end of 8 and 20 weeks. There was no histopathological defect observed on the fish and fish carcass. It was concluded that 2% or 1 % level of yeast can be included in NIFFR floating feed with the assurance of producing a kilogram of C. gariepinus with a feed of N300.00 under good management practices based on ingredient ruling price at the time of this study and this might be capable of increasing farmer's income in fish production.
    Description: Includes: 1 table and 2 figures.;Also includes: 21 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Niger ; Yeast ; Floating additives ; Performance ; Clarias gariepinus ; freshwater environment ; Growth rate ; Freshwater fish ; Fingerlings ; Artificial feeding ; Feeding experiments ; Feed ; Yeasts ; Additives ; Culture tanks ; Cost analysis ; Performance assessment ; Fish culture
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  • 52
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    Growth performance and nutrient utilization of post fingerlings Clarias gariepinus fed varied levels of biscuit waste (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24162 | 19325 | 2018-05-13 13:15:18 | 24162 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A feeding trial was conducted to determine the effect of biscuit waste meal on the growth performance and utilization of Clarias gariepinus juveniles. A total of 300 juveniles of average weight 8.85g were randomly divided into 5 Treatments, each with three replicates. Twenty juveniles were distributed into fifteen happas (0.7m3) and each happa was suspended to 3/4 of its volume using kuralon ropes carefully tied round the bamboo poles across the concrete tanks. Five diets containing 40% crude protein were formulated in which maize was replaced with biscuit waste meal at Treatment diet 1 (TD1) 0%, 25% (TD2), 50% (TD3), 75% (TD4), 100% (TD5) levels.The juveniles were fed at 3% body weight per day for 10 weeks. It was recorded at the end of the experiment that biscuit waste was most suitable as an energy supplement when incorporated at 25% replacement (TD2) with maize. TD1 had the highest weight gain followed by TD2, TD3, TD4 and TD5 respectively. There were no significant differences (P〉0.05) in the growth response in TD1 (0%), T0D (25%) and TD3 (50%). It is therefore concluded that biscuit waste meal is a cheap source of non conventional energy source which can be used favorably to replace maize (25% inclusion level) as an energy source in the diets of Clarias gariepinus.
    Description: Includes: 7 tables.;Also includes: 15 references.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Abeokuta ; Treatment ; Biscuit waste ; Net hapa ; Juvenile ; Crude protein ; freshwater environment ; Growth rate ; Nutrition ; Freshwater fish ; Fingerlings ; Diets ; Wastes ; Feed ; Feeding experiments ; Fish culture
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  • 53
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    The effects of Baker's yeast (Saccharomyces cerevisiae) on rearing of Heterobranchus longifilis: growth and survival in outdoor concrete tanks (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24158 | 19325 | 2018-05-13 13:02:50 | 24158 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Heterobranchus longifilis juveniles (93.42 - 147.77g) used for this study were product of an indoor experiment in glass aquaria transferred to outdoor tanks. This study is therefore, a continuation of the indoor study using the same feed for the fish outdoors for 230 days. They were stocked in ten concrete tanks, of sizes 2m X 2m. The fish were stocked according to the number harvested from the indoor experiment for each treatment. The experimental diets were prepared with fish meal, soybean, groundnut cake, wheat offal, yeast, premix, starch, vitamin C and Vitamin B-complex to meet the requirement of H. longifilis. The analyzed crude protein in each diet was 42.56%, 43.32%, 4369%,43.86% and 43.98%. There was significant variation (p〈0.05) in the Mean Final Weight (MFW), Mean Weight Gain (MWG), Protein Efficiency Ratio (PER), Specific Growth Rate (SGR) and Percentage Survival (PS). The survival of the fish was highest with the fish fed 2g yeast/I00g of diet and this was not significantly different from fish fed 1g yeast/ 100g diet. The cost of production of one kilogram of fish using varying levels of S. cerevisiae in diets varied significantly (p〈0.05).
    Description: Includes: 2 tables.;Also includes: 18 references.
    Keywords: Aquaculture ; Ecology ; Heterobranchus longifilis ; Nigeria ; Niger ; Growth ; Survival ; Heterobranchus longifilis ; Yeast ; freshwater environment ; Freshwater fish ; Yeasts ; Artificial feeding ; Diets ; Feeding experiments ; Culture tanks ; Growth rate ; Survival ; Fish culture
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  • 54
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    Preliminary investigation of Tribulus terrestris (Linn. 1753) extracts as natural sex reversal agent in Oreochromis niloticus (Linn. 1758) larvae (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24169 | 19325 | 2018-05-13 18:49:22 | 24169 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Five pairs of brood stocks of Oreochromis niloticus (average weight of 350 ~c 25.8g) in a ratio of 1:1 male to female were used for the fry production to examine the prospect of utilization of safer and natural extract (Tribulus terrestris) as sex reversal agent in tilapia population control. Four hundred and fifty day-old fry were randomly distributed into 18 experimental tanks (30 litres capacity) representing five test diets (50% crude protein) containing varying inclusion levels of Tribulus terrestris extract at 0.0, 1.0, 1.5, 2.0, and 2.5g per 1kg of basal feed while diet six contain 50mg per 1kg of basal feed of 17-a-methyltestosterone (MT) served as the control diet. The growth performance parameter indices measured were Mean Weight Gain (MWG), Food Conversion Ratio (FCR) and Specific Growth Rate (SGR). At the end of the study, the survival rates and sex ratio were also measured and recorded. Data collected were subjected to 2-way analysis of variance (ANOVA) where significant means were tested using the Least Significant Difference (LSD) test at p = 0.05.
    Description: Includes: 3 tables.;Also includes: 17 references.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Ibadan ; Sex reversal ; Tribulus terrestris ; Oreochromis niloticus ; freshwater environment ; Sex reversal ; Agents ; Freshwater fish ; Genetically modified organisms ; Monosex culture ; Survival ; Growth rate ; Population control ; Fish culture ; Aquaculture techniques
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  • 55
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    The use and acceptability of medicated fish feed in aquaculture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24172 | 19325 | 2018-05-13 18:53:40 | 24172 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Medicated feed in animal production systems is essential to economically produced healthy and high quality product, as it can be used to control bacterial disease. The paper review, outlined the availability of common medicated fish feeds used in aquaculture such as; Terramycin, Romet and Homemade medicated feeds. This paper also review Common Anti-parasitic medicinal foods on the Nigeria market, such as; Jungle Anti-Parasite Medicated Fish Food and MetroMed. It also emphasizes on how to select proper medication for use in aquaculture and how to store medicated feed. Medicated feed is recommended to control bacterial disease outbreaks which may be controlled by antibiotics. There are only two widely accepted and approved antibiotics available in medicated feeds for food fish. However, early diagnosis and treatment are necessary because once fish are sick they are unlikely to eat, and prevention through good management practices is the best control measure for bacterial diseases.
    Description: Includes: 8 references.
    Keywords: Aquaculture ; Nigeria ; Delta ; Medicated feed ; Aquaculture ; Terramycin ; Romet ; Nigeria ; freshwater environment ; Feed ; Antibiotics ; Bioselection ; Fish diseases ; Disease control ; Medicine ; Bacterial diseases ; Fish culture
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    The effects of dichlorvos (2, 2 - dichlorovinyl phosphate (DDVP)) induced stress on the growth of fingerlings of Clarias gariepinus (Burchell, 1822) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24165 | 19325 | 2018-05-13 13:30:18 | 24165 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was conducted to determine the effects of dichlorvos ~9 2, 2 - dichlorovinyl dimethyl phosphate (DDVP)~0 on the growth of Clarias gariepinus fingerlings. The experiment was conducted in two phases: the first phase involved the exposure of the fish to different concentrations ~9 0.00 (control), 0.4ppm, 0.5ppm, 0.6ppm, 0.7ppm, 0.8ppm, 0.9ppm, 1.0ppm, 1.1 ppm and 1.2ppm~0 of dichlorvos for four days. The second phase was a recovery process in which the fish that survived from the first phase were introduced into clean, dechlorinated, toxicant-free water and were fed at 3% of their body weight for 12 weeks. The change in weight was measured every fortnight and the feed fed was adjusted to accommodate the change in weight. The highest values for weight gain, percentage weight gain, specific growth rate and average daily weight gain occurred in the control and these values were significantly (p〈0.05) higher than the values of these parameters recorded in the other treatments. The range of values of weight gain, percentage weight gain, specific growth rate and average daily weight gain are 6.76 ~c 3.01-18.45 ~c 8.90g, 69.45 ~c 18.52 - 105.52 ~c 33.67%, 1.54 ~c 0.33 - 2.08 ~c 0.46%/day and 0.48 ~c 0.21 - 1.21 ~c 0.65g respectively. Based on the results of this study, the exposure of fingerlings of Clarias gariepinus to dichlorvos ~9 2, 2- dichlorovinyl dimethyl phosphate (DDVP)~0 affected the growth of the fish. Therefore, the use of dichlorvos on stored grains should be regulated because uncontrolled usage could cause mortality and impairment of growth in fish if the pesticide gets washed into water bodies inhabited by fish.
    Description: Includes: 1 table.;Also includes: 9 references.
    Keywords: Aquaculture ; Ecology ; Pollution ; Clarias gariepinus ; Nigeria ; Lagos State ; Toxicity ; Pesticide ; Clarias gariepinus ; Growth performance ; freshwater environment ; Freshwater fish ; Fingerlings ; Toxicants ; Pesticides ; Toxicity ; Bioaccumulation ; Feeding ; Growth rate ; Pollution effects
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  • 57
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    Impact of water hyacinth (Eichhornia crassipes) on fish catch in the lower Taylor Creek area of Bayelsa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24605 | 19325 | 2018-05-21 12:24:48 | 24605 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The aim of the study was to access the impact of water hyacinth, Eichhornia crassipes on fish catch in the lower Taylor Creek area of Bayelsa State. The experimental approach involved the division of the creek into new stations: infested and non-infested at the littoral zone. Subsequently, the deployment of six Malian traps with dimensions of 70cm diameter and 80cm height were set in each station for a period of six months using groudnut cake as bails. Furthermore, fish caught were counted and identified into families and species. From results, fish species composition obtained from the stations were a total of 9 families and 15 species. However, it was observed that the water hyacinth infested area had the lowest fish catch while the non-infestated area had the highest number of fish catch for both dry and wet season. It is therefore concluded that the invasion of Eichhornia crassipes impacted on fish population and composition.
    Description: Includes: 12 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Eichhornia crassipes ; Fish catch ; Taylor creek ; Bayelsa ; freshwater environment ; automation
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  • 58
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    Survey of physical characteristics of the upper reaches of new Calabar River, Niger Delta, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24618 | 19325 | 2018-05-22 06:12:36 | 24618 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: One of the priority research projects of the Nigerian Institute for Oceanography and Marine Research (NIOMR) is broodstock development and mass propagation of silver catfish, Chrysichthys nigrodigitatus of which the broodstock is naturally abundant in New Gala River. Selected physical characteristics and water physico-chemical parameters of the upper reach of the New Calabar River at Aluu were investigated. The highest depth value of 9.20 m was recorded in the middle of the river. The width of the river measured during spring high tide and low tide were 174 m and 110 m respectively. The cross-sectional area and average flow velocity of the river were 797.13 m2 and 0.374 m/s respectively. The discharge of the river was computed as 298.13m3/s. The river water was acidic most of the period (Hydrogen ion concentration, pH: 5.12 to 7.43), with low total alkalinity values (4.00 to 12.00 mgCaCO3/L) and low total hardness values (11.5 to 51.2 mgCaCO3/L) which indicate that the river water is black and soft. There was significant (p~,0.05) seasonal variation in temperature (23.1 to 31.7~'C\}, Secchi transparency (9.30 to 19.00 cm), total hardness (11.5 to 51.2 mgCaCO3/L), dissolved oxygen (5.20 to 7.50 mg/L) and dissolved oxygen deficit (0.02 to 2.95mg/L). These results are useful for several stake holders who use the river as a sink for trade wastes, as source of water for fish farming, as source of broodstocks of Chrysichthys nigrodigitatus, as raw water for water treatment plants, and as means of transportation of industrial materials.
    Description: Includes: 16 references.
    Keywords: Chemistry ; Fisheries ; Limnology ; Chrysichthys nigrodigitatus ; Nigeria ; New Calabar River ; New calabar River ; Physical characteristics and physico-chemical features ; Seasonal variation ; freshwater environment ; automation
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    Physico-chemical parameters in relation to fish production of Dadin Kowa Dam, Gombe State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24619 | 19325 | 2018-05-22 06:14:16 | 24619 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Eight month physicochemical study of Dadin Kowa Dam was carried out forthnightly from July, 2011 to february 2012. Air temperature ranged from 18.25~'C ~c 28~'C ~c 0.50 to 28~'C ~c 2.16. Water tmperature ranged from 18.75~'C ~c 2.21. Transparency ranged from 11.00cm ~c 1.83 to 29.63 cm ~c ~c 2.14. Conductivity ranged from 13.00~Ks/cm ~c 13.33 to 41.38~Ks/cm ~c 5.54. Hydrogen ion (pH) ranged from 6.69 ~c 1.03 to 8.39 ~c 1.17. Dissolved oxygen ranged from 6.39mg/l ~c 1.03 to 10.14mg/l ~c 1.17. Total alkalinity ranged from o.69mg/l ~c 0.38 1.34mb/l ~c 0.02. Total ammonia ranged from 0.20mg/l ~c 0.027 to 0.83mg/l ~c 0.05. There were various levels of correlation between these parameters. There was no significant difference between both sites and months (p〉0.05) of all the parameters except total nitrogen which show a significant difference between the sites (p〈0.05) and transparency also shows a significance between the months (p〈0.05). All physicochemical parameters were almost within the tolerable limits for supporting aquatic life.
    Description: Includes: 27 references.
    Keywords: Fisheries ; Chemistry ; Nigeria ; Dadin Kowa Dam ; Physico-chemical parameters ; Fish production ; Dadin Kowa Dam ; freshwater environment ; automation
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    Preliminary investigation of fish species abundance of Otammiri River, Owerri, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24626 | 19325 | 2018-05-22 06:25:03 | 24626 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study of fish species abundance of Otammiri River, Owerri, Nigeria was conducted from April to August, 2012. Four hundred and three (403)fishes belonging to 10 families, 16 genera and 21 species were collected from artisanal fishers using various fishing gears. The fish samples were taken to laboratory, identified, counted and their weights and lengths measured. The unnamed cichlid species ranked highest in percentage number and weight as well as Index of Preponderance (38.7%, 33.6% and 51.1% respectively), while the least were Polycentropis abbreviata, Hepsetus odoe, Synodontis omias, Chrysichthys aluensis and Chrysichthys furcatus each constituting 0.2% of the total number of fish collected. Among fish families, Cichlidae ranked highest in percentage number (82.63%) and weight (81.2%), followed by Hepsetidae (5. 7% and 8.0%) and Anabantidae (4.47% and 2.8% respectively). The least were Characidae, Notopteridae and Mochokidae. The presence of an unnamed fish species in the river is an indication that there could be more unknown aquatic living resources with strong potential benefits to the River. The information provided in this study reflects the potential of the fish resources of Otammiri. This will serve as invaluable baseline tool in fisheries management planning and policy formulations that will enhance the development of fisheries in the area.
    Description: Includes: 15 references.
    Keywords: Ecology ; Fisheries ; Polycentropsis abbreviata ; Hepsetus odoe ; Synodontis omias ; Chrysichthys aluensis ; Chrysichthys furcatus ; Nigeria ; Otammiri River ; Index of preponderance ; Fisheries management ; Otammiri River ; freshwater environment ; automation
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    Impact of feeding diets containing Luffa cylindrica seedmeal on the variable cost of production of African catfish, Clarias gariepinus (Burchell 1822) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24157 | 19325 | 2018-05-13 13:00:52 | 24157 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study investigates the use of Luffa cylindrica seed meal as soybean replacer in the diet of Clarias gariepinus. Five isonitrogenous diets containing soybean meal which was replaced by Luffa cylindrica at a rate of 0, 15,30,45 and 60% were made. The diets without Luffa cylindrical seed meal served as the control. Experimental diets were assigned randomly to the tanks and each group of fish was fed 5% body weight in equal proportion per day. The fish fed diet 1 had the highest incidence of cost, while the fish fed diet 4 had the lowest incidence of cost. There was no significant difference (P〉0.05) in the incidence of cost of producing 1kg fish with the different dietary treatments. The fish fed at diet 4 had the highest profit, while the fish fed at diet 1 had the lowest profit. There was no significant difference (P〉0.05) in the profit margin of producing 1kg fish with the different dietary treatments. The incidence of cost showed that it was cheaper to produce 1kg of fish with Luffa cylindrical seed meal because feeding the fish with the diet (control and tests diets) left some profit margin.
    Description: Includes: 5 tables.;Also includes: 18 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Ogun State ; freshwater environment ; Diets ; Freshwater fish ; Artificial feeding ; Feeding experiments ; Fish culture ; Production cost
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    Effects of partial and total replacement of soyabean meal with pigeon pea (Cajanus cajan) as alternative plant protein source in the diet of juvenile African mud catfish (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24160 | 19325 | 2018-05-13 13:07:24 | 24160 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A 56-day feeding trial to investigate the effects of feeding varying levels of substituted Soybeam meal (SBL) with Pigeon pea seed meal (PSM) on the performance and carcass characteristics of Clarias gariepinus was conducted. Five isonitrogenous 40% crude protein diets were formulated where PSM Clarias gariepinus (15.74 ~c 1.22g) stocked at 15 fish/50 litres tanks were fed diets in triplicates twice daily to satiation and weight changes recorded weekly. Fish fed diet with 25% and 100% PSM inclusion gave the highest mean weight gain of 25.47g and 23.34g respectively (P〉0.05). There were no significant difference (P〉0.05) among the weight gain of other treatments. Fish fed diet containing 0% SBM and 100% PSM gave the highest gross food conversion efficiency and percentage weight gain of 43.50g and 12.l8g while fish fed diet containing 50% SBM and 50% PSM had the lowest of 35.67 and 9.99 respectively with no significant changes compared with other treatments. For good growth, fish farmers are advised to consider Pigeon pea seed meal either as a partial (25%) or total replacement (100%) for soybean meal in the diet of Clarias gariepinus juveniles.
    Description: Includes: 5 tables.;Also includes: 19 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Lagos ; Soyameal ; Pigeon pea ; Clarias gariepinus ; Protein source ; freshwater environment ; Diets ; Freshwater fish ; Artificial feeding ; Feeding experiments ; Proteins ; Juveniles ; Feed efficiency ; Growth rate
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    The effect of feeding regime and rate on the growth of Clarias gariepinus (Burchell, 1822) fingerlings fed with artificial feed (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24163 | 19325 | 2018-05-26 12:00:29 | 24163 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish growth is a function of adequate supply of feed in the right quantity and time. The effect of feeding rate on the growth of Clarias gariepinus (Burchell, 1822) was studied for a period of 22 weeks. The fish were fed at the same percentage body weight throughout the study period and a bi-weekly weight gain was measured. Water quality parameters were also monitored. There was a significant increase in weight gain in daily feeding regime than in the ones in two days feeding regime. The increase in weight for the daily feeding regime was visible as from the 8th week while that for the ones in two days feeding was only significantly different in 22nd week at 0.05 level of significance. The relationship between the two feeding regime types also revealed that the daily feeding performed better than the ones in two days feeding regime.
    Description: Includes: 2 tables.;Also includes: 10 references.
    Keywords: Aquaculture ; Pollution ; Ecology ; Clarias gariepinus ; Nigeria ; Niger ; Feed ; Fish growth ; Feeding regime and weight gain ; freshwater environment ; Feeding ; Growth rate ; Freshwater fish ; Fingerlings ; Length-weight relationships ; Water quality ; Fish culture
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    Isolation, identification and characterization of Lactobacillus species from fermented locust bean (Parkia biglobosa) for use as probiotics in the aquaculture industry (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24166 | 19325 | 2018-05-13 18:40:22 | 24166 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Probiotics are a promising feed additive to stimulate animal growth and secure a low disease response in aquaculture industry where there are high stocking densities in shrimp and fish production. Fermented locust beans (Parkia biglobosa) are known to be rich in protein and used as food condiment. Probiotic bacteria were isolated from this locally available food material. Culture and characterizations of isolates were carried out. Sugar fermentation patterns were determined by using an API 50 CHL system and incubation were performed anaerobically at 37~'C. MRS broth culture grown at 37~'C overnight was added to 9ml of MRS Agar and the bacteria were incubated at 37~'C for 24 and 48 hrs. Discrete and single colony of lactobacillus was isolated using colony morphology and biochemical tests. The most significant viable taxa isolated was Lactobacillus fermentum at a pH range of (3.0-8.0), while the least viable taxa isolated was Leuconostoc mesenteroides ssp. Microscopically they were Grampositive, rod shaped, non- motile, catalase negative and absence of Endospore.
    Description: Includes: 2 tables and 2 plates.;Also includes: 15 references.
    Keywords: Aquaculture ; Nigeria ; Lagos ; Locust bean ; Probiotics ; Lactobacillus ; Probiotics ; freshwater environment ; Feed ; Additives ; Aquaculture ; Microorganisms ; Bacteria ; Disease resistance ; Fermented products ; Fish culture ; Shrimp culture
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    The future of tilapia culture in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24168 | 19325 | 2018-05-16 14:30:33 | 24168 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The culture of tilapia is assuming a greater importance globally. However, Nigeria's contribution to global production is insignificant. Although Egypt and Nigeria were the only African countries that had record of tilapia production in 1950, Egypt has left Nigeria far behind. The problem of prolific breeding still persists in our farm, making it difficult to raise tilapia to a good market size. The paper reviews Nigeria fish production, supply and demand forces and the contributions of leading tilapia producers; namely China, Thailand, Indonesia Egypt to mention a few. It reiterates some of the credentials of tilapia that makes it a good candidate for culture, the species for culture and the place of tilapia in the world fish market. The paper examines some of the limiting factor hindering the development of tilapia Industry and ways of mitigating such factors.
    Description: Includes: 16 references.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Lagos ; freshwater environment ; Fish culture ; Freshwater fish ; Limiting factors ; Breeding success ; Aquaculture development
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    Growth performance and feed utilization of mudfish Heterobranchus longifilis juveniles fed varying dietary protein levels (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24171 | 19325 | 2018-05-13 18:52:27 | 24171 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Mudcatfish (Heterobranchus longifilis) juveniles (body weight 61.60-83.05g, length 204.43 ~c 3.07 - 229.53 ~c 3.65mm) were fed with diet containing crude protein (CP) levels of 30%,35% and 40% for 10 weeks, using fishmeal as a protein source. Growth performance and feed utilization were investigated. Fish were raised in plastic aquaria of dimension 46 x 38 x 28cm3 at a temperature range of 26.0-29.0~'C, pH value of 6.6-7.4 and dissolved oxygen of 3.5-5.1 mg/1. The highest increase in body weight (23.30 ~c 4.30g) and specific growth rate (0.68 ~c 0.02% day-1) were achieved with Diet 2 (35%CP). The condition factor ranged 0.60 ~c 0.009- 0.66 ~c 0.005 and fish survival was 100% for all diets. Protein efficiency ratio (2.37 ~c 0.35) was also significantly better with 35% CP (p〈0.001). Diets 1(30% CP) and 2 (40% CP) gave lower performances. The observations in this study suggest that a 35% high quality protein diet will probably provide the needed protein requirement for H.longifilis juveniles.
    Description: Includes: 3 tables.;Also includes: 13 references.
    Keywords: Aquaculture ; Ecology ; Heterobranchus longifilis ; Nigeria ; Bayelsa ; Heterobranchus longifilis ; juveniles ; Protein ; Feed utilization ; freshwater environment ; Growth rate ; Feed ; Utilization ; Freshwater fish ; Juveniles ; Diets ; Proteins ; Fish meal ; Condition factor ; Survival ; Feeding experiments ; Fish culture
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    The growth performance and survival of Clarias gariepinus fry raised in homestead concrete tanks (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23421 | 19325 | 2018-04-25 19:22:53 | 23421 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Fertilizer application in earthen ponds has been used as a low-cost method of sustainable aquaculture production. This study was carried out to investigate the growth response of African Catfish fry Clarias gariepinus (Burchell, 1882) in three different culture media in Homestead concrete tanks. The water in the control (T1) was not treated while T2 and T3 were treated with poultry droppings and soy bean milk filtrate respectively. Nine hundred (900) catfish fry weighing averagely 0.67 ? 0.69g were randomly allocated per treatment. In each tank (2m x 3m x 1.5m) were suspended (3) net cages each (1m x 1m x 1m). Each net cage had 100 fry. The fish in tank 1 (control treatment) were fed fish meal from the start at 5% of their body weight four times daily while the other treatments were not fed at all for the first 7 days. Feeding with fishmeal commenced for treatments T2 and T3 on the next 8 ? 14 day. The weights of the feed were adjusted after weekly weighing Analyses of the culture media for phytoplankton composition and water quality parameters were done for all treatments at the end of the experiment. Tables 3 and 4. The culture media with poultry manure (T2) and soyabean filtrate (T3) were found to influence the quality and quantity of the plankton which in turn determined the growth and survival. Tables 1 and 2. However, the best weight increase was recorded in T1 (2.33g) followed by T3 (1.89g) and then T2 (1.81g) had the lowest weight gain. The survival rates in all the treatments were high but was highest in T3 (98%) followed by T2 (97%) and T1 (95%). Dissolved oxygen, pH and temperature of culture media were variously affected by the treatments. The presence of zooplanktons (Rotifer and Daphnia species) invariably supported the highest survival (98%) of the fry in treatment T3. Treatment T3 (11.56 ~c 1.14) x 103) generated higher concentrations of most of identified zooplanktons than treatments T1 (5.39 ~c 0.73) x 103) and T2 (12.78 ~c 0.98) x 103). These zooplanktons were absent in treatments T1 and T2. The result indicated that fertilizing the culture medium using soybean milk filtrate or poultry droppings improved the growth and of C. gariepinus.
    Description: Includes:- 4 tables.;18 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Ibadan ; freshwater environment ; Fish culture ; Growth rate ; Growth ; Survival ; Food organisms
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    Stress, neuro-endocrine cascade and fish broodstock quality (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23431 | 19325 | 2018-05-02 08:07:50 | 23431 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A review of the effect of stress on broodfish quality was done. Ideally, fish should be maintained under controlled conditions which, as far as possible, match or improve upon those to which the fish would have been exposed in the wild or controlled culture medium. In practice, however, the management of the rearing conditions-water quality, feeding regime and diet, stocking density, exposure to pathogens, genetic engineering and handling parameters may all create stress. When such stress is applied to a broodfish, it elicits a series of neuroendocrine responses, which if prolonged, can result in cortisol levels rising significantly above the baseline. Consequently, the health of the brood fish and the viability of the progeny are affected. Farmers and breeders are therefore advised to pay special attention to the nutrition and proper handling their broodstock.
    Description: Includes:- 2 figs.;6 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Biological stress ; Neurophysiology ; Physiology ; Fish culture ; Reproduction ; Fish physiology
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    Water recirculating aquaculture systems: management by-pass and trouble shooting (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23432 | 19325 | 2018-05-02 08:08:49 | 23432 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Water Recirculating Aquaculture system (WRAS) as a culture system can be simply configured to combine both mechanical and biological filteration mechanism. This system can be regarded as a fish factory being an intensive culture technology system with high-density stocking and carrying capacity. Recirculating systems has some production advantages over other culture systems especially in intensive production. This production system achieves good and stable water quality management and enables the farm manager to trouble shoot as management protocol is easier to determine in a more business manner. Challenges in running this system in Nigeria include poor design, irregular power supply alter failure, high cost of quality feed, poor water quality management and high cost of water quality kits. Similarly, unavoidable continuous daily stress on fish stocked, low biosecurity understanding and lack of expertise coupled with inadequate financing are common issues in running this system. Therefore, necessary by-pass protocols become necessary in the management of this system in Nigeria for profitable production.
    Description: Includes:-1 fig.;15 refs.
    Keywords: Aquaculture ; Nigeria ; Recirculatory aquaculture system ; freshwater environment ; Aquaculture ; Freshwater aquaculture ; Fish culture
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    A prelimnary study of diet in the juvenile gorean snapper, Lutjanus goreensis (Valenciennes, 1830) from Five Cowrie Creek, Lagos, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23453 | 19325 | 2018-05-04 17:40:12 | 23453 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Diet of the juvenile Gorean snapper, Lutjanus goreensis from Five Cowrie Creek was investigated between April 2008 and January 2009. Analyses of 184 specimens by numerical (NO), frequency of occurrence (FO) and geometric index of importance (GII) methods, respectively revealed a moderately high proportion (47.83%) of stomachs with food or prey. Shrimps and crabs constituted more than 80 % of total prey items. Other dietary components included lobsters, stomatopods, whole fish and fish parts. Similarly, analysis of diet composition by size - groups also indicated a predominance of the shrimps and crabs over all other prey items. In conclusion, L. goreensis can be described as a top-level carnivore feeding almost exclusively on epibenthic crustaceans in the juvenile stage.
    Description: Includes:- 2 tables.;21 refs.
    Keywords: Ecology ; Fisheries ; Lutjanus goreensis ; Nigeria ; Lagos Greek ; brackishwater environment ; Diets ; Stomach content ; Feeding behaviour
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    The fin fish assembage of Ikere Gorge, Oyo State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23459 | 19325 | 2018-05-05 12:28:56 | 23459 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The fin fish assemblage of Ikere gorge was investigated. The fin fishes comprised a total of 34 species belonging to 13 families. Chrysicthys nigrodigitatus was most abundant and highest in biomass (69,198.33 kg) accounting for 34.65% of the catch. Synodontis nigrita, Malapterurus electricus, Marcusenius psittacus Gnathonemus sensgalensis and Gnathonemus cyprinoides were the least in number, while Phago loricatus was least in biomass (20.00 kg) accounting for 0.01%.The major aim was to assess the fish resources of the gorge and evaluate the water parameters as related to fish production. No significant difference was observed in dissolved oxygen, nitrate, phosphate, water temperature, conductivity, alkalinity, total dissolved solid and pH range value in the stations. The water quality parameters were favourable for fish production. Water level and temperature were observed to guarantee high fish yield in the gorge.
    Description: Includes:- 2 tables.;16 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Ikere Gorge ; freshwater environment ; Check lists ; Population dynamics ; Physicochemical properties ; Chemical properties
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    Prelimnary biovolume characterisation of zooplankton community in Omi Dam, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23461 | 19325 | 2018-05-05 12:33:07 | 23461 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The study examined the zooplankton biomass in Omi dam to identify which specie(s) among the major ones under consideration, contributed most to the recruitment and growth of fish in the dam. Rotifera took the dominance in terms of species, followed by cladocerans and copepod respectively. Between the two stations analysed, Zooplankton density was highest (5.00 ind.l-1) in station 1 in April, while it was lowest (0.33 ind.l-1) in station 2 in January. Calanoid species contributed more in the energy supply for fish recruitment and growth. It can be concluded therefore that calanoid species contributed more to fish recruitment and growth in Omi dam.
    Description: Includes:- 1 table.;6 figs.;8 refs.
    Keywords: Ecology ; Nigeria ; Omi Dam ; freshwater environment ; Zooplankton ; Classification
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    Food habits of Chrysichthys furcatus (Gunther, 1964) from Sombrero River, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23464 | 19325 | 2018-05-05 12:39:06 | 23464 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The study examined the food habits of Chrysichthys furcatus (catfish) from the artisanal fisheries of the Sombrero River in the Niger Delta; from May 2009 to April 2010. A total of 360 specimens were used for the stomach analysis using a combination of the frequency of occurrence, gravimetric and numerical methods. Data was analysed using Shannon Weaver diversity index (H), Relative diversity (J) and index of relative importance (IRI). The results show that small Chrysichthys 28.55%, 45.23% and 39.20; fish tissues 14.70%, 9.08% and 17.44%; fish parts 25.95%, 18.76% and 18.39% , fish scale 2.60% ,3.93% and 2.55%, insects 25.78%,21.95% and20.12% as the secondary and detritus 2.42%,1.06% and 2.30% as incidental food items. The Shannon Weaver and relative diversity indicate that Chrysichthys furcatus is a predator and had no food preference.
    Description: Includes:- 2 tables.;17 refs.
    Keywords: Ecology ; Chrysichthys furcatus ; Nigeria ; Sombreiro ; R. ; freshwater environment ; Feeding behaviour ; Stomach content
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    Ontogenetic variation in the diet of Chrysichthys nigrodigitatus (Lacepede 1808) in a tropical estuarine ecosystem in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23468 | 19325 | 2018-05-05 12:46:38 | 23468 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The ontogenetic variation in the diet of Chrysichthys nigrodigitatu (Lacepede 1808) was investigated. The study was carried out for a period of 15months (Feb.-Sept. 1996 and March - Sept. 1997) based on 660 specimens of the fish. It was aimed at a detailed analysis of the diet composition of C. nigrodigitatus and the variation in diet with size class. The diet composition was analysed using the occurrence, numerical and gravimetric methods. These were combined into a composite Index of Relative Importance (IRI) which formed the basis of determining the importance of each food category. C. nigrodigitatus is a benthic omnivorous feeder subsisting on a variety of benthic food items, with significant ontogenetic shifts in diet composition. The size classes 0-30.00cm and 31-60.00cm adult had preference for plankton, 61-90.00cm preferred fish and crabs while 91-120.00cm had preferential diet of shrimps. Index of Relative Importance (IRI) was as follows: fish -31.8%, Crustaceans -23.6%, bivalves -10.61%, as major food items. The minor food items included plankton, polychaetes, palmfruits, plant materials and detritus. Variation of condition factor (C.F) with fish length was studied with highest C.F value of 1.86 for size group 10-19cm and lowest C.F value of 0.71 for size group 40-49cm.This study has not only identified C. nigrodigitatus as a benthic predator in the estuary, but has also provided data that can make significant inputs into the trophic modeling and multispecies management of the estuary.
    Description: Includes:- 1 table.;2 figs.;17 refs.
    Keywords: Ecology ; Chrysichthys nigrodigitatus ; Nigeria ; Cross River Estuary ; brackishwater environment ; Feeding behaviour ; Food composition ; Food conversion
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    Productivity indicators and best management practices situation in aquaculture industry in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23472 | 19325 | 2018-05-05 12:54:38 | 23472 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A study was conducted in February to March 2010 to analyzed constraints and identifies research priorities for development of aquaculture in Nigeria. It incorporated a cross-sectional analysis of participatory approach involving consultations with relevant stakeholders across the five agro-ecological zones of Nigeria. Consultations were made with Research Institutes and their training arms, the Fisheries Colleges; Universities, the Federal Department of Fisheries, Fish Farmers’ Organizations (especially Catfish Farmers’ Association of Nigeria, CAFAN), Agricultural Development Projects (ADPs), Non-Governmental Organizations (NGOs), Fisheries Society of Nigeria (FISON), National Special Programme on Food Security (NSPFS), Input Dealers, some private farmers and the private sector focused Catfish Farming Development Programme of the International Finance Corporation (IFC). Extensive review of relevant literatures related to aquaculture development in Nigeria and global perspective was carried out. A component of the study was to analyze the situation of the industry in terms of productivity levels and best management practices compared with global standard. Findings reveal that the best practice ethics is not yet in place in the industry. This results in poorly designed fish culture facilities, improper management, low fish survival rate in hatcheries and production ponds, resulting in low productivity and poor returns on investment. The major constraints to the growth of the industry include low quality of consultancy services, high cost of imported feeds and drugs, high cost and scarcity of fast growing fish seeds, lack of access to finance, prevalence of diseases and pests, poor quality of consulting services and absence of guidelines to regulate conduct of business in the industry along the production and supply value chain. Although the Nigerian aquaculture industry boast of the largest manpower (in that sub-sector) in Africa; the quality of business development services are considered low. Research Institutes and Universities have regular funding problems for aquaculture research, poor infrastructures, and lack of exposures of staff to regular trainings to enable them be at par with global expertise on aquaculture development.
    Description: Includes:- 3 tables.;3 figs.;9 refs.
    Keywords: Aquaculture ; Nigeria ; Fish Culture Management ; freshwater environment ; Fish culture ; Pond culture ; Aquaculture techniques
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    Social structure of fish farmers in Osun State, South-West Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23473 | 19325 | 2018-05-05 12:56:09 | 23473 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A survey of seventy-two selected fish farms in Osun State South-West Nigeria was carried out to determine the social status of the fish farmers. Structured questionnaires were used to collect information on age, educational background, marital status, mode of operation and type of culture embarked upon by the farmers among others. Data were analyzed using descriptive statistics. Results showed that most fish farmers (58.3%) in the state were male and were aged between 31-50 years old.91.7% of fish farmers were married and 95.8% had formal education. 63.9% adopted polyculture system. Tilapia and catfish were the two main species being cultured and 75% produced table fish while only 5.6% were involved in fish breeding. 83.3% practised fish farming on part-time basis and 66.7% were involved in non-agricultural occupation to supplement their production. 86.1% owned land either by inheritance or purchase, 8.3% operated on leased land and 5.6% rented the land upon which they operated. 75% of the respondents got their capital from personal savings, 11.1% from cooperatives, and only 5.6% had access to bank loans. 52.8% were regularly visited by extension agents 16.7% were occasionally visited while 30.5% were seldom visited. Only 27.8% belonged to farmers’ association.
    Description: Includes:- 2 tables.;1 fig.;10 refs.
    Keywords: Aquaculture ; Sociology ; Nigeria ; Osun State ; freshwater environment ; Fish culture ; Intensive culture ; Sociological aspects
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    Some haematological parameters of inter-generic hybrid of African catfish (Clarias anguillaris x Heterobranchus bidorsallis) juveniles and their pure lines in north eastern Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23471 | 19325 | 2018-05-05 12:53:21 | 23471 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Some haematological parameters of inter-generic hybrid African catfish (Clarias anguillaris x Heterobranchus bidorsalis) were investigated to assess the ability of the hybrids to withstand culture conditions in North East Nigeria. The result shows that packed cell volume (PCV), red blood cells (RBC), Haemoglobin (Hb), mean cell haemoglobin concentration (MCHC) and platelets (PLT) were higher in pure line Clarias anguillaris. However, white blood cell (WBC) and lymphocytes (LYM) were higher in female H. bidorsalis x male C. anguillaris (Heteroclarias) hybrid. PCV, MCHC, Hb, and RBC of all the fish species observed in this study were within the healthy ranges for fish. The results of this study shows that Heteroclarias have haematological competence for survival in culture conditions in the region.
    Description: Includes:- 2 tables.;59 refs.
    Keywords: Aquaculture ; Clarias anguillaris ; Heterobranchus bidorsalis ; Nigeria ; freshwater environment ; Haematology ; Hybrids ; Fish culture ; Haemoglobins ; Blood cells
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  • 78
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    Preliminary study on comparative morphometry of Cynothrissa mento (Regan, 1917) from Ologe, Badagry and Epe Lagoons, Lagos, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23460 | 19325 | 2018-05-05 12:31:34 | 23460 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The morphometric characters of Cynothrissa mento from three major Lagoons (Ologe, Badagry and Epe) in Lagos, Nigeria were compared to assess the possibility of this fish species from the three Lagoons belonging to the same sub-population. The length-weight relationships (LWR), and condition factors (CF) of the fish were also described as well as the physico-chemical parameters of the three water bodies. The study was conducted between May, 2009 and April, 2010 and monthly sampling of fish and water was done in each sampling site. Seven7 physico-chemical parameters were assessed and these are; temperature, pH, salinity, turbidity, dissolved oxygen, total alkalinity and total hardness. A total of 294 specimens (Ologe 60, Badagry 174 and Epe 60) of C. mento were collected from the landings of the local fisher folks from the sampling sites. Seven morphometric characters; total length (TL), standard length (SL), body depth (BD), head length (HL), head depth (HD), eye diameter (ED) and interorbital width (IW) were measured. There was no significant difference (p 〉 0.05) in all the physico-chemical parameters measured among the sampling sites except pH. Coefficient of difference revealed that the C. mento from the three lagoons are uniform in all the morphometric parameters examined, which means that the specimens from the three sampling sites do not belong to different sub-populations. The growth coefficient/slope (b) values obtained for the fish species from the sampling sites ranged from 2.27 - 2.53, and differed significantly (p 〈 0.05) from 3, which indicates that most of the fish species have negative algometric growth.
    Description: Includes:- 4 tables.;1 fig.;24 refs.
    Keywords: Ecology ; Chemistry ; Cynothrissa mento ; Nigeria ; Ologe Lagoon ; Nigeria ; Badagry Lagoon ; Nigeria Epe Lagoon ; marine environment ; Population dynamics ; Morphometry ; Check lists ; Length-weight relationships ; Condition factor ; Physicochemical properties
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  • 79
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    Body characteristics, yield indices and proximate composition of horse eye mackerel fish (Caranax carangus) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23455 | 19325 | 2018-05-04 17:42:49 | 23455 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Size measurements, anatomical composition and proximate composition of Horse eye mackerel fish (Caranax carangus) were carried out. The mean values of length (cm) and weight (g) were 21.79~c 1.76 and 87.96 ~c 21.4 respectively. Anatomical fractionation showed that the fish samples contained on the average 45.8% fillet, 17.75% head, 25.98% body frame and 6.12% gut. The proximate composition analysis showed that the fish sample contained 77.2% water content, 0.4% lipid, 20.63% protein and 1.67% ash. Horse eye mackerel fish thus constitutes a source of high protein as well as an ideal dietetic fish food.
    Description: Includes:- 2table.;1 figs.;11 refs.
    Keywords: Ecology ; Fisheries ; Caranax carangus ; Nigeria ; Lagos ; Proximate composition ; freshwater environment ; Length-weight relationships ; Chemical composition
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  • 80
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    A survey of fish fauna in Lake Kainji, New Bussa, Niger State (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23454 | 19325 | 2018-05-04 17:41:21 | 23454 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The survey of the fish fauna in Lake Kainji, Niger State and Kebbi state was carried out for a period of three months from August to October 2003 using fishermen’s catches. Forty two species of fish were identified and these were from the families Osteoglossidae, Gymnarchidae, Mormyridae, Characidae, Citharinidae, Distichodontidae, Cyprinidae Bagridae, Schilbeidae, Clariidae, Malapteruridae, Mochokidae, Channidae, Centropomidae, Cichlidae and Clupeidae. In terms of relative abundance, the family Bagridae has the highest species diversity of 20%, while Osteoglossidae, Citharinidae, Malapteruridae, Mochokidae, Centropomidae and Gymnarcidae had lowest species diversity of 2.5%.The study provides a biogenic history of fish species diversity within this period of the year in the last two decades. The significance of the study is to provide information towards a sustainable exploitation strategy in the community based management of the fisheries of the lake.
    Description: Includes:- 3 figs.;14 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Fauna ; Population dynamics ; Check lists
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  • 81
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    Food habits, sexual dimorphism and sex ratio of three Palaemonid prawns of the Nun River, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23463 | 19325 | 2018-05-05 12:36:20 | 23463 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The food habits, sex ratio and differences of three freshwater prawns ? Macrobrachium vollenhovenii, M. macrobrachion and M. felicinum from Nun River, Niger Delta were studied. It was found that although the prawns had an omnivorous diet feeding on a wide range of organisms including plants, detritus, insect parts, phytoplankton and zooplankton the food habits indicate a tendency towards a plant-based (herbivorous) diet. The adult prawns exhibit sexual dimorphism with males being larger than females; however the males were fewer in number than the females with mean ratios of 1:2.79, 1:1.58 and 1:9.12 for M. vollenhovenii, M. macrobrachion and M. felicinum. Sexual dimorphism exists in the species and brood-stock are available in the Nun River system of the Niger Delta region.
    Description: Includes:- 3 tables.;12 refs.
    Keywords: Ecology ; Macrobrachium vollenhovenii ; Macrobrachium macrobrachium ; Macrobrachium felicinum ; Nigeria ; Nun ; R. ; freshwater environment ; Feeding behaviour ; Feeding experiments ; Aquaculture ; Sexual dimorphism ; Prawn culture
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  • 82
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    Survival, growth and feed utilization of the reciprocal hybrids of Clarias gariepinus (Burchell, 1822) and Heterobranchus bidorsalis (Geoffroy, 1809) in concrete tanks (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23466 | 19325 | 2018-05-05 12:42:05 | 23466 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: An experiment was conducted to determine the survival rate, fertilization rate, growth performance and feed utilization of the reciprocal hybrids of Clarias gariepinus and Heterobranchus bidorsalis. Two genetic crosses were made: C. gariepinus (male) x H. bidorsalis (female)(Clariabranchus) and H. bidorsalis male x C. gariepinusmale (Heteroclarias. The experiment was divided into two phases; artificial propagation of the fish species using synthetic hormone and rearing the fry for 14 days; and rearing the 14 days old fry for 35 days. In the first phase of the experiment, survival of frys were estimated in each experimental unit (genetic cross) while in the second phase, growth and nutrient utilization were investigated. The result revealed that the highest %fertilization, hatching rate and %survival occurred in H. bidorsalisfemale x C. gariepinus male (Heteroclarias) and the differences were significant (p 〈 0.05). Percentage weight gain and specific growth rate were significantly (p 〈 0.05) higher in Clariabranchus than Heteroclarias. Based on the result of this study, reciprocal hybrids of Clarias gariepinus and Heterobranchus, bidorsalis is recommended for commercial aquacultural practices.
    Description: Includes:- 3 tables.;13 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Heterobranchus bidorsalis ; Heteroclarias ; Nigeria ; Lagos ; freshwater environment ; Survival ; Growth rate ; Feed efficiency ; Genetics ; Fish culture
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  • 83
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    Profitability of rice-fish farming in Bida, North Central Nigeria (2021)
    Fisheries Society of nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23486 | 19325 | 2018-05-06 12:52:48 | 23486 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: An experiment was conducted between August and November, 2008 at Wuya-Bida to determine the profitability of integrating fish culture into rice farming. Two treatments (mono-rice and rice-fish) in triplicate were used. The area of each plot was 144 m2 and the mono-rice plots consisted of only rice farming while the rice-fish plots had rice farming incorporated with the raising of Oreochromis niloticus and Clarias gariepinus fingerlings. The fish were fed with compounded feed and wheat offal and at the end of the experimental period of 60 days, O. niloticus fingerlings had a mean weight gain of 47.60 ~c1.86 g in the rice-fish plots while C. gariepinus fingerlings had a mean weight gain of 110.80 ~c2.92 g. C. gariepinus fingerlings performed better than O. niloticus fingerlings. Values for physico-chemical parameters showed that both pH and dissolved oxygen were outside the favourable limits (pH, 6.5-9; DO, 〉 5 mg/lit) recommended for warm water aquaculture in the rice-fish plots. Cost-benefit analysis showed that the integration of fish into the rice system confers substantial profitability on the system going from the production, total and net income differences between mono-rice and rice-fish plots. However, cost-benefit ratio of the mono-rice plots was slightly better than that of the rice-fish plots.
    Description: Includes:- 3 tables.;15 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Clarias gariepinus ; Nigeria ; Bida ; freshwater environment ; Rice field aquaculture ; Agropisciculture ; Fish culture ; Physicochemical properties ; Polyculture
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  • 84
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    Gut contents and feeding pattern of Macrobrachium vollenhovenii (Herklots, 1857) and Caridina africana (Kingsley, 1882) at Asejire Lake and Erin-Ijesa waterfalls, South Western Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24207 | 19325 | 2018-05-19 06:38:21 | 24207 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study with intent towards acculturation was carried out on the gut conients and feeding patterns of Macrobrachium vollenhovenii and Caridina africana occurring at Asejire lake and Erin-Ijesa Waterfalls respectively for two years using numerical abundance and frequency of occurrence methods of analysis. There was a strong correlation (p〈0.05) between prawn abundance and food availability, The gut content analysis of M. vollenhovenii revealed that juveniles were predominantly zooplanktivorous, feeding on copepods and rotifers while the adults were omnivorous, utilizing a wider variety of animal foods than plant materials. This changing of diets and patterns as the species advances in age has an implication for its culture potentials. Stomach fullness index was high during the wet season which coincided with high abundance of prawns, C. africana fed mainly on diatoms, zooplankton and other micro-phytoplankton, thus an onmivore with herbivorous tendency. The availability of both species in fresh water bodies and their foods revealed that both species can be cultured in earthen ponds since their unspecialized flexible dietary habit is an optimal strategy for sustained productivity.
    Description: Includes: 3 tables and 1 figure.;Also includes: 12 references.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Macrobrachium vollenhovenii ; Caridina africana ; Nigeria ; Asejire L. ; Nigeria ; Erin-Ijesha waterfalls ; Macrobrachium vollenhovenii ; Caridina fricana ; Gut content ; Accumulation ; Asejire Lake ; Waterfalls ; freshwater environment ; Shrimp fisheries ; Lake fisheries ; Animal nutrition ; Abundance ; Frequency ; Food availability ; Zooplankton ; Stomach content ; Breeding ponds ; Shrimp culture ; Food organisms ; Feeding behaviour
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  • 85
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    The anaesthetic effects of clove seed in selected species of grey mullets, Liza falcipinnis and Liza grandisquamis (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24225 | 19325 | 2018-05-19 07:13:31 | 24225 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The anaesthetic effects of Clove Seed extract in two species of grey mullets Liza falcipinnis and Liza grandisquamis were assessed. A total of 120 of these species comprising 60 L. falcipinnis with 30 each of fingerlings (mean length 9.86cm ~c l.ll SD: mean weight 21.20g ~c 2.10 SD) and juveniles (mean length 17.24cm ~c l.88 SD; mean weight 66.24g ~c 4.24SD) and 60 L. grandisquamis also consists of 30 each of fingerlings (mean length 10.24cm ~c 1.92 SD; mean weight 23.41 ~c 2.21 SD) and juveniles (mean length 18.21cm ~c SD; mean weight 71.21g ~c 4.12 SD) were Sampled from the recruitment ponds at African Regional Aquaculture Center, (ARAC), Buguma, Rivers State and were exposed to clove seed extracts at different concentrations of 0.0mglL (control), 5.0, 10.0, 15.0, 20.0 and 25.0mglL. The results obtained indicated a size related response to Clove seed extracts. The induction time in both species were found to decreased significantly (P〈0.05) as the concentrations of the clove extracts increased with the shortest induction time 55.61(s) observed in fingerlings of L. grandisquamis, while the longest 210.61(s) was recorded in juveniles of L. falcipinnis. However, the recovery time increased significantly with increasing concentration of the clove seed, with the highest recovery time 350.11(s) observed in L. falcipinnis at 25.0mglL concentration and the lowest 246.91(s) in L. grandisquamis at 5.0mglL concentration of the clove extracts, with the optimum dosage of 10.0mg/l and 15.0mg/l of fingerlings and juvenile sizes respectively. Interestingly, the survival of the exposed fish during the trial was 100% in both sizes of the two species. No mortality was recorded in all concentrations of the plant extracts. The findings of this trials indicated that clove seed extracts was effective, producing minimum stress and zero mortalities and therefore can be recommended as an effective anaesthetic for use in aquaculture.
    Description: Includes: 27 references.
    Keywords: Aquaculture ; Liza falcipinnis ; Liza grandisquamis ; Nigeria ; Rivers State ; Anaesthetic ; Clove ; Seed mullets ; aquaculture ; brackishwater environment ; Anaesthetics ; Seeds ; Brackishwater fish ; Juveniles ; Fish ponds ; Recruitment ; Size ; Comparative studies ; Aquaculture techniques ; Fish ; Biological stress ; Fingerlings ; Fish culture
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  • 86
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    Length-weight relationships of Hyperopisus bebe occidentalis in Zaria Dam (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24631 | 19325 | 2018-05-22 06:33:31 | 24631 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The morphometric parameters of 54 Hyperopisus hebe occidentalis obtained from Zaria Dam were investigated. The length occidentalis examined ranged from 18.9-41.0 cm and weight ranged from 25-425g, the largest male weighed 175g while the female was 425g. The length-weight relationship of H. Bebe occidentalis in Zaria showed a positive correlation (r=0.897) in both regression exponent (b〉3) for both sexes showed positive allometric growth pattern. The mean condition factor obtained (0.95- 1.26). In both sexes, the condition factor generally increased with increase in individual size of the fish irrespective of sex but slightly in male than female.
    Description: Includes: 13 references.
    Keywords: Ecology ; Fisheries ; Hyperopisus bebe ; Nigeria ; Zaria Dam ; Microbiological ; Proximate analysis ; Biochemical characterization ; S. nigrita ; Mormyruss ; C nigrodigitatus ; freshwater environment ; automation
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  • 87
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    Comparison of microbiological and proximate analysis of Synodontis nigrita, Chrysichthys nigrodigitatus and Mormyrus rume in Olomore market, Abeokuta, Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24632 | 19325 | 2018-05-22 06:35:03 | 24632 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was carried out to compare the microbiological and proximate analysis of fresh Synodontis nigrita, Mormyrus rume and Chrysichythys nigrodigitatus sold at Olomore market, Abeokuta, Ogun State. This fish are always available at Olomore market and other market around Abeokuta and its environment. The protein, carbonhydrate, moisture, and ash of the fishes was based on the method of analysis of the Association of Official Analysis (AOAC:1990). Data for each sp. were subjected to analysis of variance (ANOVA). The Results show no significant difference in moisture content of Chrysichthys nigrodigitatus (70.99 ~c 1.09%), Mormyrus rume (67.30 ~c 4.08%) and Synodontis nigrita (67.33 ~c I.99%). The crude protein content of Chrysichthys nigrodigitatus (12.10 ~c 0.74%) Mormyrus rume ( 15.48 ~c 1.63%) and Synodontis nigrita (I0.73 ~c 0.61%). For carbohydrate content we have Chrysichthys nigrodigitatus (1.15 ~c 0.13%9), Mormyms rume (2.09 ~c 0.20%) and Synodontis nigrita (2.04 ~c 0.10%). Fat content of Chrysichthys nigrodigitatus (7.15 ~c 1.29%) Mormyrus rume (8.97 ~c I.9%) and Synodontis nigrita (8.62 ~c 0.89%) and for ash content of Chrysichthys nigrodigititus (6.33 ~c 0.69%), Mormyrus rume (4.89 ~c 0.21%) and Synodontis nigrita (8.85 ~c 0.27%). For crude protein there was different (p 〈 0.05) same with fat content, ash content, and carbohydrate content (p〈 0.05) unlike moisture content and dry matter content which is (28.57 ~c 1.55%), (32.50 ~c 4.08%) and (32.67 ~c 1.99%) in Chrysichthys nigrodigitatus, Mormyrus rume and Synodotis nigrita. Result showed total bacteria count from (1.9 to 3.8 x 10〈sup〉6〈/sup〉 cfu/ml) from Chrysichthys nigrodigitatus while (2.8 to 4.7 x 10〈sup〉6〈/sup〉 ur cfu/ml) was obtained for Synodontis nigrita and (2.6 to 3.8 X 10〈sup〉6〈/sup〉cfu/ml) for Mormyrus rume. The micro-organism isolated were pseudomonas spp; Escherichia spp; Klebsiella spp; omomls spp, Escherichia spp., Klebsiella spp., Staphylococcus spp., Proteeus spp. and Micrococcus spp. On biochemical characterization the following bacteria was isolated Pseudomonas spp., Escherichia spp., Klebsiella, spp. staphylococcus spp., Proteus Micrococcus spp.
    Description: Includes: 44 references.
    Keywords: Ecology ; Fisheries ; Chrysichthys nigrodigitatus ; Mormyrus rume ; Synodontis nigrita ; Nigeria ; Haematology ; Sex-reversal ; Growth paramwters ; Nutrient utilizatio ; S. melanotheron ; freshwater environment ; automation
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  • 88
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    Preliminary studies on some physico-chemical parameters and fish species composition of Doma Dam, Nasarawa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24638 | 19325 | 2018-05-24 09:36:38 | 24638 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Study of some Physico-chemical parameters and fish species composition of Doma Darn was carried out between the month of August 2012. Fishing communities along the dam were selected at sampling stations and collection of fish species. The values of physico-parameters obtained for stations were in the range of 28.10-92 m for depth, 27.70-28.48~'for temperature, 7.03-7.64 for PH, 7.23-7.64mg/l for dissolved oxygen (DO), 30.08-31.75 ntu for turbidity, 94.64-105.17mg/l for alkalinity and 79.17-80.58mg/l for total hardness. The result indicated that there was significant difference (p〈0.5)for depth, temperature turbidity and alkalinity, while there was no significant difference (p〈0.05) for DO, pH and water hardness among the stations. The result of these parameters among the duration shows that there was significant different (p〈0.05) in all the parameters except pH. The study revealed that there were twenty-five (25) fish species belonging to 12 families in the dam. The family Cichlidae and Mochokidae and Bagridae which has three each, While the family, Polypteridae, Channidae, Centropomidae, flepsetidae and Protopteridae has the lowest number of one (1) each. The overall result revealed that the Phvsico-chemical parameters were mostly influenced by duration and not much by stations; and parametersoaram measured were within the recommended water quality requirement for growth and survival of aquatic organisms.
    Description: Includes: 10 references.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Doma Dam ; Doma Dam ; Fishing community ; Physico-chemical parameter ; Fish species ; freshwater environment ; automation
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  • 89
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    Whole rocky fresh water prawns, Caridina africana as replacement for fish meal in diets for African catfish (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24658 | 19325 | 2018-05-27 14:53:28 | 24658 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Specimens of Caridina africana were oven dried at 110~'C for 24 hours and refrigerated at 200~'C prior to proximate analysis. Whole rocky freshwater prawn meal (WRFWPM) was evaluated as a dietary replacement for fish meal in the diet of C. gariepinus fingerlings. The diets were fed to triplicate groups of C. gariepinus fingerlings (10.6 ~c 0.08g) reared in concrete tanks, to assess the effects of its partial or complete replacement with fish meal for 90 days. The diets comprised a control which contained fish meal as a protein source; 0% and four others on weight basis at 25%, 50%, 75% and 100% in which fish meal was progressively substituted with WRFWPM. The crude protein content was 40% and fed at 4% body weight of the fish per day. Results shows that the daily body weight gain, feed conversion ratio, protein efficiency ratio and protein productive values were highest in diet with 50% replacement, closely followed by diet with 25% replacement. All parameters were significantly different for all diets (p〈0.05). Higher dietary inclusion WRFWPM of 75% and 100% led to decrease in growth performance and nutrient utilization of C. gariepinus fingerlings. The cost WRFWPM was significantly lower than that of fish meal. Though the economic viability of C. africana is yet to be evaluated due to its tiny size; its substitution as a fish meal replacer in the diet of C. gariepinus is considered profitable.
    Description: Includes: 25 references
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; C. africana ; C. gariepinus ; Prawn ; Digestibility ; Replacement ; Proximate ; freshwater environment ; automation
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    Growth and survival of African catfish (Clarias gariepinus, Burchell 1822): comparison on natural and artificial diet (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24164 | 19325 | 2018-05-13 13:17:21 | 24164 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The growth and survival of Clarias gariepinus larvae with an average length and weight of 6.0mm and 2.57mg respectively were fed commercial dry feed, decysted Artemia or copepods over a twelve day period. Larvae were hatched using the induced hormone technique. After endogenous feeding, 80 larvae were distributed into each of the nine tanks and fed ad libitum thrice a day. The highest growth rate and survival were observed in larva fed with decysted Artemia (p〈0.05). The present study showed that formulated diet may not be a suitable starter diet for Clarias gariepinus larvae.
    Description: Includes: 1 table.;Also includes: 16 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Adamawa State ; Clarias gariepinus ; Decysted Artemia ; Commercial diet ; Copepod ; Growth and survival ; freshwater environment ; Growth ; Survival ; Freshwater fish ; Artificial feeding ; Fish larvae ; Length-weight relationships ; Diets ; Fish culture
    Repository Name: AquaDocs
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  • 91
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    Supplementation of date palm (Phoenix dactylifera) seed as feed additive for improved performance of juvenile African catfish (Clarias gariepinus) (Burchell, 1822) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24174 | 19325 | 2018-05-13 18:56:53 | 24174 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The present study examined the utilization potential of date palm seed (DPS) as feed additive in the diet of African catfish Clarias gariepinus for efficient feed utilization. A total of 150 African catfish (weight ranged from 81.13 to 91.35 g) were divided into five experimental groups. The experiment was conducted for 70 days. Experimental diets were identical in all composition except for the variation in DPS level. Non-inclusion of DPS was used at 0% (control) and other levels are 0.5% (diet 2), 1.0% (diet 3), 1.5% (diet 4) and 2.0% (diet 5). The growth performance and nutrient utilization of African catfish including Weight Gain (WG), Specific Growth Rate (SGR), Protein Efficiency Ratio (PER) and Protein Productive Value (PPV) were significantly (p〈0.05) higher than those of fish fed control diets, where DPS supplementation at 1.5% appears to be generally higher than other levels. In the same trend fish fed diets with DPS supplementation produced improved fish carcass values and the haematology of fish was generally better from diets in all DPS fed fish. Overall production performance and subsequent fish quality assessments indicated that the diets containing 1.5% DPS level recorded the best performance in African catfish compared to other levels including the control diet. Based on the result of the present study, it is concluded that date palm seed supplementation positively influenced growth performance and feed utilization of African catfish as well as ensuring their healthy status.
    Description: Includes: 3 tables.;Also includes: 20 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; freshwater environment ; Feed ; Additives ; Utilization ; Freshwater fish ; Juveniles ; Diets ; Feeding experiments ; Fish culture ; Feed efficiency
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: 92-97
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  • 92
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    Effects of chicken manure to fingerlings of Nile tilapia (Oreochromis niloticus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24210 | 19325 | 2018-05-19 06:43:04 | 24210 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of acute toxicity of chicken droppings to fingerlings of Oreochromis niloticus was determined under laboratory conditions using static bioassay for a period of 96 hours. The 96-hrs LC50 was estimated to be 2.19 with upper and lower confident limits of 3.24 and 1.48g/l. Water quality examination revealed a reduction in the level of dissolved oxygen, increase in alkalinity and free carbon dioxide with increase in concentrations of the fertilizer while there were no significant different (P〉0.05) in the ievels of pH and temperature when compared with the control. Fish exposed to higher concentrations of the organic fertilizer became darker in colour with mucous secretion, exhibited erratic swimming and showed signs of respiratory distress before death. Methods and standard doses for subsequent organic fertilizer application in fish ponds for survival and growth are discussed.
    Description: Includes: 2 tables.;Also includes: 24 references.
    Keywords: Pollution ; Aquaculture ; Oreochromis niloticus ; Nigeria ; Abuja ; Organic fertilizer ; Acute toxicity ; Oreochromis niloticus ; Water quality ; freshwater environment ; Manure ; Organic fertilizers ; Fingerlings ; Freshwater fish ; Toxicity ; Water quality ; Inspection ; Dissolved oxygen ; Alkalinity ; Carbon dioxide ; Fish ponds ; Survival ; Growth ; Pollution effects ; Bioassays ; Controlled conditions ; Lethal limits ; Fish culture
    Repository Name: AquaDocs
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    Format: 231-234
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    Effect of processing methods on the proximate composition of Gmelina arborea seed (2021)
    Lagos (Nigeria) | FISON
    In:  http://aquaticcommons.org/id/eprint/24216 | 19325 | 2018-05-19 06:54:43 | 24216 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study examines the proximate composition of nutrients in Gmelina arborea seed using two processing method (toasting and cooking). The seed was soaked accordingly to eliminate the anti nutritional factors present in it. The seeds was later air-dried and divided into seven samples each weighing 300g. Three samples were toasted using electric heating thermostart oven for 5mins, 10mins and 15mins and labelled T1, T2 and T3 respectively. Another three (3) samples were cooked using pressure pot for the same duration and labelled T4, T5 and T6 respectively. The seventh sample (T7) serve as the controlled unprocessed. The samples were milled and subjected to proximate analysis. The toasted samples had the same crude protein content of (16.36 ~c 0.00%) With no significant difference (P〈0.05%), there was significant difference among the cooked samples with (7.62 ~c 0.02%, 10.78 ~c 0.01% and 12.37 ~c 0.01%) the least crude protein was found in unprocessed sample. The crude protein was found to increase as the cooking time increases. This study showed that toasted and cooked Gmelina arborea seed would serve as good source of fish feed and could be used as a source of energy for improved feed utilization efficiency.
    Description: Also includes: 11 references.
    Keywords: Aquaculture ; Gmelina arborea ; Nigeria ; Niger State ; Gmelina arborea seed ; Proximate composition ; Phytate ; freshwater environment ; Nutrition ; Chemical composition ; Seeds ; Food technology ; Feed efficiency ; Utilization ; Fish culture ; Product development
    Repository Name: AquaDocs
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    Format: 254-256
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  • 94
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    Microbiological quality of fresh tilapia raised in ponds fertilized with raw and sterilized cow dung manures (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24222 | 19325 | 2018-05-19 07:06:04 | 24222 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A total of 2,800 tilapia (Oreochromis niloticus) were stocked in seven duplicates 5 by 4 m2 earthen ponds in NIFFR Integrated Farm, New-Bussa, Niger-State. Raw and sterilized poultry manure of 0.13 to 0.52 kg/m3 concentrations were used to fertilize the ponds with the unfertilized ponds serving as control. The following bacteria were isolated from the cow dung manure; Escherichia coli, E. co1iOl57:H7, Aeromonas hydrophila,Salmonella typhi, Shigella dysenteriae and Staphylococcus aureus. The fish samples from the 0.13 and 0.26 kg/m3 sterilized manure fertilized ponds had zero count in the muscles while samples from other ponds had pathogens in their fish muscles. The study revealed that fish samples from sterilized manures were better in terms of microbial safety for fish productions hence sterilized manure are recommended for use in fish production to ensure the microbial safety of the fish, handlers and that of the consumers.
    Description: includes: 13 references.
    Keywords: Aquaculture ; Oreochromis niloticus ; Escherichia coli ; Aeromonas hydrophila ; Samonela typhi ; Shigella dysenteriae ; Staphylococcus aureus ; Nigeria ; Niger State ; Catfish ; Pathogens ; Microbial quality ; Raw and sterilized manue ; freshwater environment ; Bacteria ; Freshwater fish ; Fish culture ; Fish ponds ; Manure ; Microorganisms ; Freshwater aquaculture ; Aquaculture products ; Food fish ; Quality assurance ; Muscles ; Microbial contamination
    Repository Name: AquaDocs
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    Format: 278-280
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  • 95
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    Growth performance of two strains of Clarias gariepinus in indoor and outdoor concrete tanks (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24579 | 19325 | 2018-05-20 05:59:31 | 24579 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Six indoor concrete tanks ( 1.5m x 2.0m x 1m) were stocked with 120 C. gariepinus fingerlings (9.52 ~c 52g). Six outdoor concrete tanks (2m x 2m x lm) were stocked with 240 fingerlings (9.66 ~c 1.52g). The fish samples were collected from Osi Ekiti, Ekiti State and from the National Institute for Freshwater Fisheries Research hatchery, New Bussa, Niger State, both in Nigeria. The fish were acclimatized for three days and were fed with coppens feed. The experimental feed had crude protein level of 40.5% and was fed to the fish for 51 days in two treatments indoor and outdoor. There was no significant variation (p〉 0.05) in the mean initial weight, mean final weight, mean weight gain, food conversion ratio, protein intake, specific growth rate and percentage survival of fish stocked indoors. There was significant difference (p〈 0.05) in the protein effic1ency ratio of fish fed indoors. There was significant difference (p〈 0.05) in the mean weight gain. mean final weight, food convertion ratio, protein intake and protein efficiency ratio of two strains of fish fed the diet outdoor. There was no significant difference (p〉 0.05) in the specific growth rate and percentage survival of the two strains of fish fed outdoor. The highest weight gain was ohserved in the outdoor fish from Osi and the lowest weight gain was recorded in the indoor from New Bussa.
    Description: Includes: 32 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Growth ; C. gariepinus ; Indoor ; Outdoor ; freshwater environment ; automation
    Repository Name: AquaDocs
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  • 96
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    Typha latifolia infestation and fish species migration in Hadejia Nguru wetland (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24604 | 19325 | 2018-05-21 12:23:19 | 24604 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The river was divided into two, within each sampling station. Open water and Typha latifolia infested area. The extent of coverage of Typha latifolia each year were determined using line transect. Experimental gill nets were used for the experiment in each location, and the data were collected every three months for the period of two years. The numbers of fish caught and their species in the three sampling sites were recorded. Seventy-four different species of fish were caught in the first year in open water while sixty one different species were caught in Typha latifolia infested area. In the second year seventy-four different species of fish were caught, while forty-five different species of fish were caught in Typha latifolia infested area. Typha latifolia proliferation affects all physio-chemical parameter in water.
    Description: Includes: 7 references〉
    Keywords: Ecology ; Fisheries ; Typha latifolia ; Nigeria ; Infestation ; Typha latifolia ; fish migration ; freshwater environment ; automation
    Repository Name: AquaDocs
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    Assessment of the bacteriological profile of water and fish samples from Hadejia reservoir in Jigawa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24609 | 19325 | 2018-05-22 05:56:26 | 24609 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Hadejia reservoir is a floodplain complex in north eastern Nigeria. This area has long been noted for its importance in fish production. It is also important to both year round native birds and European water birds that travel over the Sahara desert to this wetland to spend their winters. Quantitatiive and qualitative profile of bacteria in the reservoir was carried out. Quantitative analysis of bacteria in the water revealed that the water contained total heterotrophic count (THC) of 3.1 x 103 CFU/ml to 3.5 x 106 cfu/ml and total coliform count (TCC) ranging from 1.4 x 102 to 1.4 x 103 CFU/ml. Bacteria load in the fish intestines were 3.5 x 103 CFU/g and 3.1 x 104 CFU/g for total coliform and total heterotrophic count respectively. Fish gills had less count (2.1 x 102 CFU/g and 3.4 x 102 CFU/g for TCC and THC respectively), than the fish intestines. Bacteria species such as Aeromonas hydrophila, Vibrio cholera, Shigella species were isolated from the water samples. Escherichia coli, Salmonella sp. Shigella sp. were isolated from the fish samples.
    Description: Includes: 12 references.
    Keywords: Ecology ; Fisheries ; Aeromonas hydrophila ; Vibrio cholera ; Escherichia coli ; Nigeria ; Hadejia Reservoir ; Bacteriological profile ; Hadejia reservoir ; freshwater environment ; automation
    Repository Name: AquaDocs
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    Preliminary studies on the food and feeding habits of Synodontis membraneceus from Ogobiri River, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24625 | 19325 | 2018-05-22 06:23:51 | 24625 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The food and feeding habits of Synodontis membraneceus of Ogobiri River of Bayelsa State, Nigeria was studied using 44 male and 51 specimens that were bought from fishers in the study area measuring between 5 and 25 cm total length. The Numerical and the frequency of Occurrence method of analysis were used. For the males, the food items by the numerical method were copepods (168), insects, (118), Cladocera (69), and unidentified items (32). In the female specimens, the food items were Cladocera (286), Insect (216), Copepod (100) and unidentified organisms/materials (65). In the Frequency of Occurrence method for the males, Copepod was still with a total of (48), Cladocera (44), Insects (29) and unidentified (16). For the females, Cladoera (48), Insects were (30) by Copepods (35) and unidentified (19). The Percentage composition of food items by the Numerical method was Cladocera (45.5%), Insects (34.5%), Copepod (12.5%), and unidentified items (7.0%) while the Percentage Frequency of Occurrence was, Cladocera, (30.5%), Insects (30.9%), Copepod (29.6%), and unidentified items (9.0%).
    Description: Includes: 21 references.
    Keywords: Ecology ; Fisheries ; Synodontis membraneceus ; Nigeria ; Ogobiri River ; Numerical methods ; Frequency of occurrence ; S.membranneceus ; Ogobiri River ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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  • 99
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    Food and feeding habits of Auchenoglanis occidentalis from Lake Akata, Benue State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24628 | 19325 | 2018-05-22 06:28:42 | 24628 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Food and feeding habits of Auchenoglanis occidentalis were analyzed from samples collected between May 2008-April 2009, in Lake Akata. A total of 97 fish specimens were used for the study. The fish specimens used for the study were obtained from fishermen operating on Lake Akata. These fishermen use various fishing gears including hand nets, cast nets and gill nets of various standard mesh sizes (20.2, 25.4, and 30.5mm). Food and feeding habits were investigated using point and frequency of occurrence methods. The seasonal and monthly feeding index were also noted in the stomach contents of Auchenoglanis occidentalis over the period of investigation. The most important food items were Insects, insect larvae, Algae, and Fish scale. The result indicated that Auchenoglanis occidentalis is an omnivore but had a tendency to predate more on insects.
    Description: Includes: 22 references.
    Keywords: Ecology ; Fisheries ; Auchenoglanis occidentalis ; Nigeria ; Akata Lake ; Auchenoglanis occidentalis ; Food and feeding habits ; Lake Akata ; Nigeria ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: 247-252
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  • 100
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    Growth response of Nile tilapia (Oreochromis niloticus) fed graded levels of sun-dried cassava peel meal (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24651 | 19325 | 2018-05-26 12:03:29 | 24651 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted at the farm section of the department of fisheries technology, Federal polytechnic Nekede, Owerri in Factorial design of five treatments of cassava peel meal at 0%, 25%, 50%, 75%, and 100% graded levels were formulated. The casssava peel meal was sun-dried for 48 hours, ground, and added to the feed fed to 150 fingerlings of Oreochromis niloticus into 10 tanks in triplicates, and fed twice daily at 5% body weight for 60 days. The result shows that fish fed with 100% cassava peel meal had the highest mean weight gain of 10.46 ~c 0.0l and specific growth rate of 1.23 ~c 0.04. The second best result was shown in fish fed with cassava peel meal with weight gain of 9.93 ~c 0.03 feed conversion ratio (FCR) of 1.75 ~c 0.04 and specific growth rate of 1.24 ~c 0.02. The poorest result was shown by fish fed 25% cassava peel meal with the lowest survival rate, weight gain,feed intake and specific growth rate respectively. This connotes that diet with 100% fed graded level of sun-dried cassava peel meal can best be utilised at a ratio of 75% to 15% CPM, and second best diet with 75% fed graded level of sund-ried cassava peel meal could also be utilized at 11.25% reduction due to its survival rate parameter over the best. Moreover, this proportion should be utilised for improved growth of Nile tilapia (Oreochromis niloticus) for profit maximization.
    Description: Includes: 12 references.
    Keywords: Aquaculture ; Ecology ; Oreochromis niloticus ; Nigeria ; Cassava pel meal ; Growth response ; O. niloticus ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: application/pdf
    Format: 338-340
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