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  • 1
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 226-231
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  • 2
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    A comparative study of the decomposition of Rhizophora racemosa and Nypa fruticans of the great Kwa River, Cross River State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24641 | 19325 | 2018-05-24 09:41:43 | 24641 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Mangroves are specialized marine ecosystem which is highly productive. They act as shelter, breeding and nursery grounds for a variety of Marine and brackishwater invertebrates and fishes. Some of the dominant plant species in mangrove vegetation of Nigerian coastline are Rhizophora species and Nypa fruticans. Studies were conducted on the decomposition of Rhizophora species and N. fruticans. The objective was to compare their decomposition rates and proffer informed management decisions. Decomposition rates of the two were monitored for 112 days using litter box experiment. Eight litter boxes were stocked with 10g of leaves of each species and two boxes containing the respective plants species were removed and examined for dry matter, carbon and nitrogen contents. There was no significant difference in the rates of decomposition of Rhizophora and N. fruticans leaves (p~.0.05) even though N. fruticans showed slightly higher rate of decomposition than Rhizophora. The linear relationship between the loss in dry matter and number were expressed as Y= 10.1-0.080x in N.fruticans, and Y=9.0-0.073x in Rhizophora sp. It was concluded that the argument in favour of the eradication of N.fruticans for the thriving of Rhizophora is inaccurate. Containment of the population rather than control is the logical strategy for the management of the riparian vegetation in the face of climate change.
    Description: Includes: 8 references.
    Keywords: Biology ; Fisheries ; Rhizophora racemosa ; Nypa frutican ; Nigeria ; Great Kwa River ; Decomposition rate ; Nipa palm ; Mangrove ; Ecosystem management ; marine environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 303-305
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  • 3
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 232-236
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  • 4
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 237-241
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  • 5
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    A survey of the fisheries of River Niger at Yauri, Kebbi State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24188 | 19325 | 2018-05-16 14:57:51 | 24188 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A survey of the fisheries of river Niger at Yauri was conducted with the aid of questionnaires administered randomly at four (4) landing sites of Tashan Kasuwa (main market), Gidan-ruwa, Yabon-ruwa and Hutawa. A total of fifty (50) questionnaires were administered in all the villages. From the research work it was found that 76 % of the fishermen operate on full time basis while 24 % operate on part time basis. Out of the 50 fishermen interviewed only 46% were licensed to operate there. The type of fishing gears and equipments used in Yauri are hook and line, cast net, gill net and seine net. About 46 % of the fishermen were found using mesh size less than 2.0 cm. The dominant fish species caught during flood and dry seasons include Clarias spp., Lates niloticus respectively. Higher catches are made in the months of March and April. All the fishermen interviewed (100%) do not process their fish but disposed them off fresh. Sixty percent of the fishermen belong to different cooperative societies, while 40% do not belong to any cooperative society. The problem associated with fishing operation at Yauri includes that of lack of credit facilities, lack of extension agents, and high cost of fishing items, poor road network and remote location of the fishing village.
    Description: Includes: 5 tables.;Also includes: 8 references
    Keywords: Fisheries ; Nigeria ; Yauri ; Niger River ; Fisheries ; Fishing operations ; River Niger ; yauri ; freshwater environment ; Fishery surveys ; Fishermen ; Artisanal fishing ; Seine nets ; Fishing gear ; Fishing ; Equipment ; Fish ; Catch statistics ; Cooperatives ; Financial management ; Extension activities ; Fishing villages ; Locations (working) ; Seasonal variations ; River fisheries
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 152-154
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  • 6
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    Acute toxicity of 2, 3-dichlorovinyl dimethyl phosphate (Sniper 1000EC) and response of Clarias gariepinus Burchell under laboratory conditions (2021)
    Lagos (Nigeria) | FISON
    In:  http://aquaticcommons.org/id/eprint/24215 | 19325 | 2018-05-19 06:53:11 | 24215 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study investigated the acute toxicity of 2, 3-dicholrovinyl dimethyl phosphate (Sniper 1000EC) on the African mud catfish, Clarias gariepinus juveniles (mean weight 19.47 ~c 1.05g) using static bioassay method. Sniper 1000EC is an organophosphate pesticide. Each treatment in the acute test was in triplicate with bioassay media concentration of 0,5, 10, 15 and 20 mg/l. Data on mortalities of fish, water physic-chemical parameters as well as changes in haematological indices were subjected to one way analysis of variance (ANOVA) at 5% probability level. Duncan multiple range test was used to separate differences between the means. The 96hr LC50 estimated by probit analysis during the exposure was found to be 8.20mg/l. Behavioural abnormalities of the exposed fish included erratic and uncoordinated swimming and bleached skin with lesion at the highest concentration (20mg/l). Blood dyscrasias attributable to the toxicant was observed with a significant (p〈0.05) decrease in haemoglobin, haematocrit, red blood cells, white blood cells, lymphocytes and monocytes. Mean corpuscular volume (MCV), Mean corpuscular haemoglobin (MCH), neutrophils, eosinophil and basophil increased significantly (p〈0.05) with increasing concentrations of the toxicant. These abnormalities in body and blood parameters as a result of exposure to the toxicant make the study to recommend that the use of Sniper 1000EC by local fishermen be banned to preserve aquatic lives in Nigerian inland water bodies.
    Description: Includes: 22 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Niger State ; Sniper 1000EC ; Clarias gariepinus ; Toxicity ; Haematological indeces ; freshwater environment ; Toxicity ; Phosphate deposits ; Response analysis ; Freshwater fish ; Juveniles ; Bioassays ; Toxicity tests ; Physicochemical properties ; Controlled conditions ; Haematology ; Pollution monitoring
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 250-253
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  • 7
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    An evaluation of ichthyo-fauna composition of Oramiri-Ukwa River, Imo State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23465 | 19325 | 2018-05-05 12:40:39 | 23465 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: An aspect of artisanal fisheries of Oramiri-Ukwa River was studied for 6 months from January to June 2008, to get the base-line information on the artisanal fisheries of Oramiri-Ukwa River and appraise the Ichthyo-fauna of the river and their monthly distribution. Data collected was subjected to Simpson’s index, Shannon-Weiner index and Marglefs’ index analysis. The Ichthyofauna community was composed of 30 species representing 16 families with Cichlidae having the highest number of species. Nineteen (19) species were present in both wet and dry season. Wet season recorded more species than Dry season with 52.1% and 47.9% respectively. General diversity value of 0.856 (dry) and 0.672 (wet) was observed. Key words: Ichthyo-fauna, Oramiri-Ukwa, composition
    Description: Includes:- 2 tables.;2 figs.;12 refs.
    Keywords: Fisheries ; Nigeria ; Oramiri-Ukwa R. ; freshwater environment ; Check lists ; Species diversity ; Stock assessment ; Population dynamics ; Ichthyology ; Fauna
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 300-304
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  • 8
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    Aqua-tourism potentials in some fishing sites in bitumen bearing wetlands of Ondo State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23433 | 19325 | 2018-05-02 08:09:53 | 23433 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 24-month survey was conducted during the wet (May- August) and Dry (October ?April) season of 2004 and 2006 along eight economic fishing sites in Ondo State bearing Wetland, with the aim of determining the abundance, species diversity of some ornamental species thus promoting ecotourism potential and preventing the loss of these species in the area during and after exploitation. The study was carried out in 4 study zones namely Odigbo (S1), Ode-Aye (S2), Okitipupa (S3), and Ilaje ese-odo (S4) noted for active bitumen seepage. Fishing potential of the area was assessed using catch per unit effort method as well as physico chemical analysis of water samples obtained from designated sites in the area in accordance with AOAC methodology. Fish compositions were assessed using multifilament gillnet, of different sizes hanging from 38 mm to 178 mm. The results revealed that the area is blessed with 24 economic species of fishes belonging to 13 families which could boost the tourist potential of Ondo State. The percentage composition of families identified varies as follows: Ariidae (2.04%), Anabantidae (3.27%), Bagridae (6.36%), Channidae (4.32%), Characidae (10.62%) Cichlidae (45.65%) Clupeidae (3.94%), Clariidae (11.78%), Hepsetidae (0.95%), Mormyridae (7.42 %), Malapteruridae (1.13%), Schilbiidae (1.76%), Polypteridae (0.76%). The family Cichlidae was the most abundant in the area during the study period. The diversity of fish during the study varied with locations and season .The study showed higher fish population during the dry season than raining season and lower population in study zones highly polluted by bitumen seepages. The study emphasizes the need for sustainable resource management during bitumen exploitation.
    Description: includes:- 2 tables.;1 fig.;12 refs.
    Keywords: Fisheries ; Nigeria ; Ondo State ; freshwater environment ; Fish consumption ; Tourism ; Recreation ; Stock assessment
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 114-118
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  • 9
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    Aspects of reproductive biology of Hyperopisus bebe occidentalis (Gunther) in Zaria Dam, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23457 | 19325 | 2018-05-04 17:47:03 | 23457 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Studies were conducted on some aspects of the reproductive biology of Hyperopisus bebe occidentalis in Zaria dam. Fish were captured by using nets of various mesh sizes for 24 months. Sex ratio of female to male was 1:1.08. Fully matured gonads were observed from July to October (rainy season). Fish with spent gonads were found from December to February, virgin or immature gonads (stage I and II) were found in February to May, with the peak in March in female fish and January in male. The estimated fecundity ranged from 2025 to 4192 eggs per female with mean of 2822.4 ~c SD 781.43 eggs that had standard length range of 24.20cm to 35.50cm. The gonadosomatic index (GSI) ranged from 1.63% to 3.31%. There was a significant correlation (r = 0.873, p〉0.05) between the weight of the fish and fecundity and insignificant correlation (r=0.497, p〈0.05) between the standard length and fecundity.
    Description: Includes:- 1 table.;2 figs.;19 refs.
    Keywords: Fisheries ; Hyperopisus bebe occidentalis ; Nigeria ; Zaria Dam ; freshwater environment ; Reproduction ; Reproductive behaviour ; Reproductive cycle ; Fecundity ; Gonadosomatic index ; Sex ratio
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 253- 257
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  • 10
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    Assemblages of fish species of Ikpa River in Akwa Ibom State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24182 | 19325 | 2018-05-13 19:11:34 | 24182 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish species were investigated for 12 calendar months from March 2009 - February 2010 forthnightly using traps, gillnets and cast nets from three sampling stations in Ikpa River. Ornamental fish species were sorted out from the pooled samples. The findings revealed that out of the 2307 fish specimens sampled, 1074 specimens made up of 38 species and 19 families were of indigenous ornamental fish. The highest contributing family in terms of number of species is Cichlidae (10 species) whereas Schilbeidae (593 specimens; 55.21%) is the highest contributor in terms of total number of specimens sampled. This is followed by Mochokidae and Mormyridae with 4 species each and Cichlidae with 158 specimens (14.70%). At the species level, the highest contributor is Physalia pellueida (577 specimens;53.72%)and is followed by Erpetoichthys calabarcus (60 specimens; 5.59%). The least contributors were Heterobranchus bidorsalis, periophthalmus barbarus and Pelyicachromis pulcher (1 specimen; 0.09%). Twelve families recorded only one species each. These great potentials of ornamental fish have been left unexploited and hence, undeveloped. Several species of ornamental fish have been imported into and exported from Nigeria by businessmen. This paper therefore highlights the constraints and also make recommendations for the exploitation and development of ornamental fishery in Akwa Ibom State and its environs.
    Description: Includes: 2 tables.;Also includes: 11 references.
    Keywords: Fisheries ; Nigeria ; Ikpa R. ; Exotic ; Ornamental ; Indigenous ; Fish species ; Ikpa River ; freshwater environment ; Lake fisheries ; Ecological associations ; Artisanal fishing ; Taxonomy ; Ornamental fish ; Exploitation ; Fish ; Stock assessment ; Potential resources ; Fishery development ; Fishery surveys ; Freshwater fish ; Check lists
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 124-128
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