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  • 1
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26201 | 17342 | 2019-02-08 08:32:30 | 26201 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: The Ryukyu Islands consist of many islands located between Kyushu in mainland Japan and Taiwan. The islands in the south-western area of the Ryukyu Islands belong to the Okinawa Prefecture. The Ryukyu Islands are strongly affected by the Kuroshio Current and are renowned for their coral reefs with high diversity of tropical and subtropical species. Giant clams traditionally have been utilized as fisheries resources for a long time in this area. According to fisheries statistics, catches of Tridacna crocea in Okinawa have decreased drastically during the last 30 years and currently are less than one tenth of previous catches. Fishing can easily deplete stocks of giant clams because the clams inhabit shallow waters and take at least three years to attain sexual maturity. Techniques for the mass seed production and aquaculture of three species (T. crocea, T. squamosa, and T. derasa) were established in Okinawa. Four hundred thousand seeds of giant clams of 8 mm shell length (SL) are supplied to fishermen for use in aquaculture or stock enhancement every year. This paper will review the (1) biology of giant clams, (2) present status of aquaculture of giant clams in Okinawa, and (3) other studies on giant clams in southern Japan.
    Keywords: Aquaculture ; Biology ; Clam culture ; Bivalve culture ; Clam fisheries ; Spat ; Marine aquaculture ; Seed (aquaculture) ; Seed production ; Stocking (organisms) ; Transplantation ; Biology ; Functional morphology ; Classification ; Taxonomy ; Habitat ; Life cycle ; Molluscan larvae ; Japan ; Tridacna derasa ; Tridacna crocea ; Tridacna squamosa ; Tridacna maxima ; Hippopus hippopus
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  • 2
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26199 | 17342 | 2019-02-08 08:42:06 | 26199 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Aquaculture and fisheries management require tools for identifying individuals or groups of aquatic organisms for the purpose of monitoring performance (growth, survival and behavior) and stock structure. In aquaculture research, commercially important traits of tagged individuals are assessed to generate supportive data for selective breeding, genetic improvement and commercial-scale fish farming. Fisheries management employs identification systems for the evaluation of stock abundance, population dynamics and documentation of wild and hatchery-bred stocks. Stock structure analysis is useful in the planning and implementation of sound stock management and more importantly, in stock enhancement programs. Blankenship and Leber (1995) underscored the inclusion of tagging/marking strategies for released hatchery stocks in the guidelines for responsible marine stock enhancement. Identifying and keeping track of introduced stocks in release habitats allows an assessment of their adaptability in the wild (Allendorf et al., 1988) and the success of the reseeding and/or restocking effort. Although often used interchangeably, the terms ‘tags’ and ‘markers’ differ by definition. Tags are artificial or synthetic materials that are attached to the aquatic organism to allow individual or group identification while markers are traits or characters either applied or inherent to the organism (Thorsteinsson, 2002). Tags/markers are essential in evaluating resource distribution patterns, behavior, migration and movement of stocks, dynamics of exploited aquatic populations and evolutionary processes, all of which comprise baseline information for any stock management, enhancement and conservation program in aquaculture and fisheries (Allendorf et al 1988, Mulvey et al., 1998).
    Keywords: Aquaculture ; Fisheries ; DNA ; DNA barcoding ; Genetic markers ; Stock assessment ; Stocking (organisms) ; Stocks ; Aquaculture ; Tagging ; Tags ; Genetic techniques ; Depleted stocks ; Fishery management ; Seed collection ; Seeding (aquaculture)
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  • 3
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26209 | 17342 | 2019-01-31 08:42:32 | 26209 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Fisheries development in Lao PDR is confined to inland fisheries development and sustainable freshwater aquaculture including culture-enhanced capture fisheries and fishery-enhanced aquaculture. Given the potential of water, wetland and aquatic resources and the magnitude of decline in fish catches from the Mekong River and its tributaries, the Government of Lao PDR has given priority to fisheries development with strong concern for sustainable aquaculture. The overall policy framework is therefore geared toward the sustainable use, appropriate management and protection of natural resources: forest, land and water resource including aquatic biodiversity. The national goal for fisheries development during the last decade was focused on how to increase fish production from aquaculture while maintaining capture fisheries, recognizing that about 50% of the dietary protein of Lao people comes from living aquatic resources which are important for food security of the nation.
    Keywords: Aquaculture ; Fisheries ; Fisheries ; Fishery development ; Fishery management ; Fishery resources ; Inland fisheries ; Aquaculture ; Freshwater aquaculture ; Aquaculture development ; Stock assessment ; Stocking (organisms) ; Stocks ; Rare species ; Protected resources ; Rare resources ; Threatened species ; Seed (aquaculture) ; Seed production ; Brood stocks ; Breeding ; Aquaculture regulations ; Fishery regulations
    Repository Name: AquaDocs
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    Format: 103-108
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  • 4
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26210 | 17342 | 2019-02-01 08:37:02 | 26210 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Species extinction is a global issue that requires all nations to practice sustainable management. This paper aims to examine the status of endangered fisheries species in Malaysia, and highlight some resource management initiatives including the restocking and stock enhancement program in the country. Its scope covers only aquaculture-based species, which is in line with the Program on Stock Enhancement for Species of International Concern being implemented by the Southeast Asian Fisheries Development Center/Aquaculture Department in the Philippines.
    Keywords: Aquaculture ; Fisheries ; Species extinction ; Nature conservation ; Overfishing ; Rare species ; Threatened species ; Vulnerable species ; Stock assessment ; Stocks ; Depleted stocks ; Fishery resources ; Stocking (organisms) ; Resource management ; Fishery management ; Freshwater fish ; Brackishwater crustaceans ; Brackishwater fish ; Marine fish ; Marine molluscs ; Habitat ; Habitat improvement ; Marking ; Capture-recapture studies ; Tagging
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  • 5
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26207 | 17342 | 2019-02-01 08:34:07 | 26207 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: This 150-page book documents the proceedings of an experts' consultation held at AQD in July 2005. It contains nine review papers and seven country papers.
    Keywords: Aquaculture ; Fish culture ; Shellfish culture
    Repository Name: AquaDocs
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  • 6
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26204 | 17342 | 2019-02-08 06:47:20 | 26204 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Echinoderms are either specifically targeted by gleaners and divers, or form part of the multispecies invertebrate fishery in many coastal areas in the Philippines. The existence of a local sea urchin market in northern Philippines (e.g., Pangasinan, La Union) benefits many coastal families that depend on this fishery for subsistence. In Bolinao, Pangasinan, over 40 families are reportedly dependent on this fishery. Major sea urchin species collected include Tripneustes gratilla, Diadema spp. and Salmacis spp. In the case of holothurian fishery, with over a century of fishery history for holothurians, at least 25 species mostly belonging to the families Holothuriidae and Stichopodidae are commercially important (Schoppe 2000). While there may be local consumption of both fresh and dried products, the latter are largely exported. Echinoderm fishery is dependent on wild stock. The high demand far exceeding supply, good global market prices and their biology (e.g., slow mobility, shallow water benthic habitat) render them vulnerable to overexploitation. The contribution of echinoderm products to the Philippine economy is substantial. The relative contribution of echinoderm products to the income and socio-economic well-being of fisherfolk who collect these invertebrates is undocumented. However, it has been noted that middlemen, especially local buyers who sell trepang in Manila and Manila-based traders-exporters monopolize the profits (F. Nievales, unpublished data). Products from both echinoderm groups remain in short supply in the country and so trading, limited only by declining natural stock, continues to be lucrative.
    Keywords: Aquaculture ; Echinoderm culture ; Echinoderm fisheries ; Sea cucumber fisheries ; Threatened species ; Nature conservation ; Vulnerable species ; Sea urchin fisheries ; Marine aquaculture ; Stock assessment ; Depleted stocks ; Hatcheries ; Aquaculture facilities ; Seed production ; Stocking (organisms) ; Philippines ; Holothuria scabra ; Tripneustes gratilla ; Diadema ; Salmacis
    Repository Name: AquaDocs
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    Format: 61-69
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  • 7
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26202 | 17342 | 2019-02-08 08:28:18 | 26202 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Recently, the Pew Project (2001 to 2005) of the senior author entitled ‘Coral reef habitat and productivity enhancement through coral transplantation and giant clam restocking’ was implemented with the aim to improve the biodiversity and productivity of stressed coral reef habitats in 10 selected demonstration sites in the Philippines. These were meant to serve as models for other communities. Transplantation of corals and reseeding of giant clams were the approaches. Nubbins or small fragments from nearby large coral colonies and abundant solitary forms were transplanted to the target sites. Care was exercised to avoid or reduce any negative impacts on the natural source communities. Only cultured giant clams were used, specifically the threatened Tridacna gigas at sizes that would ensure their chances of survival in the wild (approximately 20-30 cm shell length). Following deployment, monitoring activities were undertaken, focusing on macro-invertebrates and fish, as well as the assessment of the survival and growth of experimental animals. Liaison work was done with local communities to raise their environmental awareness and to ensure their cooperation. This manuscript draws principally from results of the Pew Project. At present, two other restoration projects supported by the European Union and the Global Environment Facility Coral Reef Targeted Research Project are being implemented at the Bolinao Marine Laboratory of the University of the Philippines Marine Science Institute (UP-MSI) in Pangasinan. These projects are testing the efficiency of floating and standing coral nurseries in growing coral nubbins in addition to transplanting fragments or branches of corals to restore degraded coral reefs.
    Keywords: Aquaculture ; Coral ; Coral farming ; Coral reefs ; Marine aquaculture ; Clam culture ; Bivalve culture ; Transplantation ; Seeding (aquaculture) ; Stocking (organisms) ; Artificial reefs ; Philippines ; Tridacna gigas ; Acropora
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  • 8
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/25848 | 17342 | 2018-10-11 09:12:21 | 25848 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-16
    Description: The Organization for Economic Cooperation and Development (OECD) and the Food and Agriculture Organization (FAO) of the United Nations Agricultural Outlook 2015-2024 reported that fisheries production worldwide is projected to expand by 19% between the 2012-14 base period and 2024, to reach 191 million metric tons (MT) and the main driver of this increase will be aquaculture, which is expected to reach 96 million MT by 2024, 38% higher than the base period (average 201214) level. Among the 7 key uncertainties that affect gains in productivity, the potential of animal disease outbreaks to affect aquaculture production and subsequently domestic and international markets are once again highlighted, although for the first time in this outlook. Another milestone document, the “Blue frontiers: managing the environmental costs of aquaculture” identified a number of fish health issues, including increased risk of the spread of pathogens and diseases with intensification, through increased movement of aquatic animals, inter-regional trade and introduction of new species and new strains, and through the use of trash fish or live feed; concerns on residues and development of drug resistant pathogens brought about by the abuse on the use antimicrobials and other veterinary drugs; limited availability of vaccines; environmental stressors that compromise the immune system; difficulties faced by developing countries in implementing international standards; and the need for legislation, enforcement and capacity building. The issues identified then and now are almost the same. Addressing animal health issues in aquaculture is very challenging because the sector is highly complex (with a wide range of diversity in terms of species, systems, practices and environment, each presenting different risks), its fluid environment, and the transboundary nature where fish is considered as one of the most traded commodity, aquatic animals require more attention in order to monitor their health: they are not visible except in tank holding conditions; they live in a complex and dynamic environment and feed consumption and mortalities are hidden under water. This paper looks at the status of a newly emerging disease of cultured shrimp, acute hepatopancreatic necrosis disease (AHPND), which has been recognized as the most important non-viral disease threat to cultured shrimp. In particular, this paper presents the highlights of the International Technical Seminar/Workshop: “EMS/AHPND: Government, Scientist and Farmer Responses” held from 22–24 June 2015 in Panama City, Panama, which was organized under the auspices of an FAO inter-regional project TCP/INT/3502: Reducing and Managing the Risks of AHPND of Cultured Shrimp, being participated by 11 countries, namely: Colombia, Ecuador, Guatemala, Honduras, Mexico, Panama and Peru from Latin America and the Caribbean (LAC) region and India, Iran, the Philippines and Sri Lanka from the Asian region. The Panama EMS/AHPND June 2015 event aimed to provide a platform to improve the understanding of the disease through the lens of governments, scientists and producers and collectively generate practical management and control measures. More than 100 stakeholders from 21 countries representing the government, academe and producer sectors participated in the event. The highlights contain the latest available information at that time (June 2015) about AHPND including the current state of knowledge about the causative agent, the host and geographical distribution, detection methods, risk factors, management and actions of regional and international organizations.
    Keywords: Aquaculture
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  • 9
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26133 | 17342 | 2019-01-22 07:02:05 | 26133 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: The paper gives an account of the research work carried out at Jepara, Indonesia, on induction of maturity of milkfish in ponds and enclosures, and procurement of the spawners from the wild for seed production by hypophysation. Seven to eight years old pond grown milkfish were found sexually immature. Experiments are being conducted for growing and inducing maturity in 1-2 years old milkfish in fertilized ponds with regular tidal flow of water and also under regular hypophysation program. Milkfish spawners collected from sea had a few males in oozing condition and females mostly spent.
    Keywords: Aquaculture ; Biology ; Milkfish culture ; Fish culture ; Sexual maturity ; Spawning ; Brackishwater aquaculture ; Shrimp culture ; Pond culture ; Polyculture ; Induced breeding ; Breeding ponds ; Indonesia ; Milkfish ; Chanos chanos
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  • 10
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26134 | 17342 | 2019-01-22 06:57:34 | 26134 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Growth of young milkfish was studied at different levels of salinity over a period 68 days. Results suggested that young milkfish reared in freshwater or less saline sea water grew faster than in sea water. The increase in body weight was neither due to the increase in water content nor increase in feeding rate. The difference in growth rate might be attributed to the deviation from the original acclimating salinity. Mechanisms of the effect of salinity in retarding or accelerating milkfish growth should be investigated in the future.
    Keywords: Aquaculture ; Milkfish culture ; Growth ; Salinity effects ; Body weight ; Feeding ; Commercial species ; Fishery biology ; Ecology ; Taiwan ; Milkfish ; Chanos chanos
    Repository Name: AquaDocs
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  • 11
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26138 | 17342 | 2019-01-22 06:50:35 | 26138 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: The epibranchial organ of milkfish was believed for long to be a respiratory organ similar to that in Anabantoids. Later on, the structure was considered to be an accessory to the digestive system. The observations made by the authors on the physiological functions of the organ supports the latter views. This finding, probably would provide a new field of research on milkfish.
    Keywords: Aquaculture ; Biology ; Marine fish ; Fish physiology ; Respiratory organs ; Gills ; Milkfish culture ; Chanos chanos
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  • 12
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26139 | 17342 | 2019-01-22 06:43:20 | 26139 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Milkfish fry were collected at the Pandan shoreline and 500 meters offshore. While shore-caught fry were uniform in size those captured offshore varied in size and stage of development.
    Keywords: Aquaculture ; Fisheries ; Marine fish ; Milkfish culture ; Fry ; Seed collection ; Seeding (aquaculture) ; Philippines ; Milkfish ; Chanos chanos
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  • 13
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26141 | 17342 | 2019-01-22 06:10:52 | 26141 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: A comprehensive bibliography of the publications on the culture of milkfish (Chanos chanos) that was published in 1975 or earlier.
    Keywords: Aquaculture ; Biology ; Bibliographies ; Documents ; Fishery resources ; Research ; Research programmes ; Milkfish culture ; Fishery biology ; Milkfish ; Chanos chanos
    Repository Name: AquaDocs
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    Format: 71-94
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  • 14
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26143 | 17342 | 2019-01-22 05:54:11 | 26143 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: In studying the nutritional requirements of young milkfish experiments were conducted to develop a purified test diet. Mixtures of the purified constituents tested were: vitamin-free casein, vitamin-free gelatin, supplemented with L-tryptophan and L-cystine as the protein sources; shark liver oil and soybean oil as the far sources; and dextrin as the carbohydrate source. Mineral mixture and vitamin mixture were also added. The results showed that a test diet containing vitamin-free casein supplemented with L-tryptophan as the protein source was best for the growth of young milkfish. Soybean oil was found to be a better source of fat. Vitamin mixture (4%) and mineral mixture (10%) were observed to promote growth in young milkfish. A purified test diet consisting of vitamin-free casein 60%, L-tryptophan 0.5%, soybean oil 10%, vitamin mixture 4%, mineral mixture 10%, carbohydrate and others 16% was thus suggested for young milkfish.
    Keywords: Aquaculture ; Milkfish culture ; Artificial feeding ; Feed efficiency ; Nutritive value ; Diets ; Feed composition ; Nutritional requirements ; Animal nutrition ; Animal growth ; Feeding experiments ; Juveniles ; Milkfish ; Chanos chanos
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26155 | 17342 | 2019-01-22 03:37:50 | 26155 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Methods used in the capture, transport and domestication of adult milkfish are described and illustrated.
    Keywords: Aquaculture ; Fisheries ; Aquaculture techniques ; Transportation ; Milkfish culture ; Capture-based aquaculture ; Marine fish ; Milkfish ; Philippines ; Chanos chanos
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    Format: 204-221
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26156 | 17342 | 2019-01-22 02:39:52 | 26156 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Newly captured milkfish released 0.8 mm in diameter non-hydrated eggs spontaneously in captivity. After injection with partially purified salmon gonadotropin (SG-G100), 1.2 mm in diameter hydrated eggs were released. These eggs, however, were not fertilized.
    Keywords: Aquaculture ; Biology ; Milkfish culture ; Capture-based aquaculture ; Spawning ; Reproductive behaviour ; Reproductive cycle ; Sexual reproduction ; Induced breeding ; Fish eggs ; Ichthyoplankton ; Seed (aquaculture) ; Seed production ; Milkfish ; Philippines ; Chanos chanos
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26132 | 17342 | 2019-01-21 08:44:54 | 26132 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: The proceedings contain the papers presented at the International Milkfish Workshop Conference held at Tigbauan, Iloilo, Philippines last May 19-22, 1976. The conference covered topics about the behavior and bio-ecology of milkfish in the wild, egg and larval surveys, maturation and reproduction in wild and in captivity, and egg incubation and larval rearing. Moreover, it also tackles the milkfish predators, diseases and stress, and the research network for countries and institutions engaged in milkfish research. The contributions of the selected participants during the meeting which are contained in this volume are cited individually in ASFA. [Abstract prepared by the indexer.]
    Keywords: Aquaculture ; Fisheries ; Milkfish culture ; Conferences ; Behaviour ; Feeding behaviour ; Ecology ; Biology ; Fish eggs ; Fishery surveys ; Ichthyoplankton surveys ; Larvae ; Sexual maturity ; Sexual reproduction ; Natural populations ; Incubation ; Hatching ; Rearing ; Larval development ; Predators ; Husbandry diseases ; Biological stress ; Fish physiology ; Fishery institutions ; Research institutions ; Chanos chanos ; Milkfish
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26200 | 17342 | 2019-02-08 08:37:35 | 26200 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: The Aquaculture Department (AQD) of the Southeast Asian Fisheries Development Center (SEAFDEC) started stock enhancement activities in 2000 as part of the Coastal Fishery Management Project in Malalison Is., Culasi, Antique, Philippines (SEAFDEC/AQD 1998). This was the same year as the Bangkok Declaration and Strategy for Aquaculture Development (NACA/FAO, 2000), which affirmed the potential of stock enhancement to increase fish supply. Since then, research on seed production, and release and monitoring strategies has been initiated on the abalone (Haliotis asinina), seahorses (Hippocampus barbouri, and H. kuda), mud crabs (Scylla serrata, S. olivacea and S. tranquebarica), top shell (Trochus niloticus), and window-pane oyster (Placuna placenta). Closing the life cycle and mass production of juveniles have been attained for most of these species, but actual releases have been conducted only for abalone and mud crabs. In this review article, we describe the present situation of stock enhancement of abalone, mud crab and seahorse at AQD.
    Keywords: Aquaculture ; Fisheries ; Fishery institutions ; Fishery management ; Aquaculture development ; Stock assessment ; Depleted stocks ; Stocking (organisms) ; Aquatic organisms ; Seed production ; Transportation
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26205 | 17342 | 2019-02-08 06:43:14 | 26205 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Seahorses (family Syngnathidae, genus Hippocampus) have set precedents globally. They were among the first marine fishes of commercial importance to be listed on both the IUCN Red List and CITES Appendix II. Overfishing and non-selective fishing are two agents in their depletion, so management is clearly needed. We here outline what is known about these fishes and their trade, before considering the potential role the culture and release could play in rebuilding wild populations.
    Keywords: Aquaculture ; Marine fish ; Marine fisheries ; Marine organisms ; Tropical fish ; Marine aquaculture ; Resource conservation ; Aquaculture economics ; Aquaculture development ; Stock assessment ; Stocks ; Depleted stocks ; Hippocampus barbouri ; Hippocampus erectus ; Hippocampus fisheri ; Hippocampus fuscus ; Hippocampus histrix ; Hippocampus ingens ; Hippocampus kuda ; Hippocampus mohneki ; Hippocampus reidi ; Hippocampus trimaculatus ; Hippocampus abdominalis ; Hippocampus breviceps ; Hippocampus capensis ; Hippocampus whitei ; Hippocampus zosterae ; Hippocampus guttulatus
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26206 | 17342 | 2019-02-08 06:36:11 | 26206 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: The Mekong giant catfish (Pangasianodon gigas Chevey, 1930) is one of the largest freshwater fish in the world, measuring up to 3 m in length and weighing in excess of 300 kg. It is endemic to the Mekong River Basin area. It is found in Tonle Sap Lake, Tonle Sap River, and the Mekong River. It is not known to occur in the upper 2,000 km of the Mekong River. The current extent of occurrence is estimated at around 4,150 km. Historical reports indicate that the species was abundant in the early 1900s with 40-50 fish caught yearly in Nong Khai Province, north-east Thailand. However, since that time the number of fish caught has declined. This paper discusses several important information about Mekong Giant Catfish, such as rarity and size, natural food, natural spawning season and spawning grounds, and age and size at first maturity. Moreover, the breeding program and the stock enhancement activities of the Thai Department of Fisheries were also presented in the paper.
    Keywords: Aquaculture ; Freshwater fish ; Freshwater aquaculture ; Inland fisheries ; Endemic species ; Stocks ; Depleted stocks ; Fishery resources ; Stock assessment ; Stocking (organisms) ; Breeding ; Tagging ; Population genetics ; Thailand ; Pangasianodon gigas
    Repository Name: AquaDocs
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26211 | 17342 | 2019-02-01 08:35:40 | 26211 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Presented in the paper are the stock enhancement programs of the Union of Myanmar which is being implemented by the Department of Fisheries. The State’s vision is to assist the national economy by promoting livelihood programs for rural people through the development of the fisheries sector. To achieve such goal, one of the major activities is to undertake a stock enhancement program which has been implemented since 1983. The DOF subsidizes the annual seeding of freshwater fish and prawns into natural waters. Species used in seeding include common carp (Cyprinus carpio), tilapia (Oreochromis), rohu (Labeo rohita), catla (Catla catla), and featherbacks fish (Notopteridae), freshwater prawn Macrobrachium and tiger shrimp Penaeus monodon. Activities include annual stocking of seeds in the Ayeyarwaddy River and its tributaries, lakes, reservoirs, dams and other bodies of water.
    Keywords: Aquaculture ; Fisheries ; Stocking (organisms) ; Stocks ; Depleted stocks ; Fishery resources ; Stock assessment ; Overexploitation ; Rare species ; Protected resources ; Threatened species ; Vulnerable species ; Resource management ; Habitat ; Habitat improvement ; Livelihoods
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    Format: application/pdf
    Format: application/pdf
    Format: 117-120
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26208 | 17342 | 2019-02-01 08:26:45 | 26208 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: In the 1960s, the Japanese economy was starting to industrialize. The rapid increase in business investment in new factories and equipment stimulated a yearly economic growth rate of approximately 12% (METI 1970). However, these developments have disrupted coastal landscapes through land reclamation and industrial effluents (Fishery Agency 1980a). Furthermore, overfishing has accelerated with increased consumer spending and demand for fish protein. Consequently, coastal fish resources such as red sea bream (Pagrus major), kuruma prawn (Marsupenaeus japonicus) and swimming crab (Portunus trituberculatus) have been depleted and income of coastal fisherfolk has decreased (Fishery Agency, 1980). Under such conditions, the Japanese government initiated the Stock Enhancement Program in 1963 (Fishery Agency, 1980; Imamura, 1999). The program initially targeted red sea bream and kuruma prawn in the Seto Inland Sea in southern Japan which covers almost 3,000 islands (Imamura, 1999). Because the fundamental concept of stock enhancement programs was to compensate juvenile loss caused by high larval mortality in the ocean, development of mass juvenile production techniques was emphasized (Fishery Agency 1980a; Matsuoka, 1989). Therefore, the release of juveniles became a typical form of stock enhancement in Japan. The current number of target species for stock enhancement has increased to almost 80 species. Stock enhancement is undertaken by both the national government and local governments together with conservation of fishing ground and regulation of fish catches for resource management (Resource Association 1983a; Imamura 1999; Fishery Agency 2000; JASFA 2003a). This article reports the present status of stock enhancement in Japan from the organizational and technical viewpoints.
    Keywords: Aquaculture ; Fisheries ; Fishery resources ; Stocks ; Stock assessment ; Fishery organizations ; Hatcheries ; Fish ; Aquatic crustaceans ; Aquatic molluscs ; Spawning ; Seed production ; Resource conservation ; Protected resources ; Rare resources ; Resource management ; Stocking (organisms)
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    Format: application/pdf
    Format: 91-101
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26214 | 17342 | 2019-02-01 08:38:49 | 26214 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: World economic growth has led to considerable changes in the ecosystem in many places and has raised concerns on global resource management particularly aquatic animal resources and their living environment. In Vietnam, aquatic animal resources play an important role in the national economy and are one of the targets for economic development. However, under high population pressure, high demand for seafood has resulted in unfavorable living environment. Aquatic animal resource has been over-exploited and in some places reported to be declining; hence some species have become extinct or endangered. This paper provides a list some endangered freshwater, brackishwater, and marine species. Moreover, the seed production activities and the release strategies for resource conservation of the government of Vietnam are also presented.
    Keywords: Aquaculture ; Fisheries ; Rare species ; Habitat loss ; Species extinction ; Threatened species ; Vulnerable species ; Stock assessment ; Stocking (organisms) ; Stocks ; Freshwater fish ; Freshwater molluscs ; Freshwater organisms ; Marine fish ; Marine molluscs ; Marine organisms ; Brackishwater crustaceans ; Brackishwater fish ; Brackishwater molluscs ; Brackishwater organisms ; Resource conservation ; Resource depletion ; Rare resources ; Resource management
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    Format: application/pdf
    Format: application/pdf
    Format: 139-144
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26203 | 17342 | 2019-02-08 06:52:33 | 26203 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: In Palawan, Philippines, observed reduction of trochus shell resource in various areas was due to unregulated harvest mainly by compressor (hookah) divers and free diving fishers from other provinces. The latter migrate to Honda Bay for greater livelihood prospects (Gonzales, 2004), increasing the population of coastal communities along the Bay. According to fishers in Honda Bay, their shellfish resources were bountiful until traders and divers from other parts of the country came to Palawan in the 1970s, depleting topshell Trochus niloticus and other species. One of the objectives of Coastal Resource Management (CRM) is the regeneration of depleted resources and their sustainable use. On the other hand, the socio-economic objectives are: a) to alleviate poverty in coastal communities through added income and, b) to encourage responsible use of coastal resources through active participation of coastal communities in decision-making, planning, and implementation. The community-based topshell stock enhancement in Barangay Binduyan was assisted by the Fisheries Resource Management Project (FRMP) of the Bureau of Fisheries and Aquatic Resources of the Department of Agriculture (DA-BFAR). The objectives of this paper are to: 1) describe the processes in a community-managed stock enhancement project; 2) document monitoring and evaluation of the project; and 3) give recommendations to improve future community-managed stock enhancement project.
    Keywords: Aquaculture ; Fisheries ; Mollusc culture ; Marine molluscs ; Stock assessment ; Stocks ; Stocking (organisms) ; User participation ; Participatory approach ; Community planning ; Resource conservation ; Resource management ; Nature conservation ; Protected resources ; Threatened species ; Sustainability ; Sustainable development ; Philippines ; Trochus niloticus
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    Format: application/pdf
    Format: 49-59
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26135 | 17342 | 2019-01-22 06:54:32 | 26135 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Vertical salinity gradient columns were used to investigate the salinity preference of milkfish fry. Newly captured fry showed a preference for 32‰ salinity. Fry which had been in captivity for one to five days, at 12 or 22‰ salinity, had no salinity preference between waters of 12, 22 or 32‰ salinity.
    Keywords: Aquaculture ; Salinity ; Salinity effects ; Fry ; Fish larvae ; Milkfish culture ; Philippines ; Milkfish ; Chanos chanos
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 43-46
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26142 | 17342 | 2019-01-22 05:59:28 | 26142 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: The paper describes a simple and inexpensive method of handling and transporting wild sabalo captured from the sea.
    Keywords: Aquaculture ; Fisheries ; Marine fish ; Transportation ; Fish handling ; Capture-based aquaculture ; Brood stocks ; Milkfish culture ; Milkfish ; Chanos chanos
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 95-103
    Format: 9
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26140 | 17342 | 2019-01-22 06:13:58 | 26140 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Presented in this paper are the recommendations on current and future research activities for the biological investigations on milkfish (Chanos chanos). Included were the behavior and bio-ecology of milkfish in the wild. It also tackled the protocols in transporting broodstocks.
    Keywords: Aquaculture ; Biology ; Milkfish culture ; Research programmes ; Behaviour ; Fishery biology ; Ecology ; Taxonomy ; Geographical distribution ; Migrations ; Environmental effects ; Environmental factors ; Biological age ; Growth ; Growth rate ; Feeding ; Feeding behaviour ; Sexual maturity ; Reproduction ; Gonads ; Spawning ; Reproductive behaviour ; Fish eggs ; Fish larvae ; Larval development ; Incubation ; Pathology ; Fish physiology ; Synonymy ; Vernacular names ; Chanos chanos
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 58-70
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26152 | 17342 | 2019-01-22 03:10:47 | 26152 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: This account is a brief review of the investigation carried out in India on the various aspects of the biology of the milkfish. It covers the records of observations on the distribution of Chanos fry in the coastal areas, food and feeding of the fish, its growth, maturity, fecundity and spawning, and also certain experimental results on the physiological adaptation of the fish together with the histological structures of its kidney, pituitary and thyroid. While emphasizing the paucity of data on the adult milkfish in the wild, the priority areas where information is lacking especially on the spawning ground, reliable identifying characters of the egg as well as on the possible existence of different racial stocks have been discussed.
    Keywords: Aquaculture ; Biology ; Marine fish ; Fishery institutions ; Geographical distribution ; Feeding behaviour ; Fish physiology ; Histology ; Reproduction ; Reproductive behaviour ; Spawning ; Spawning grounds ; Spawning seasons ; Fish eggs ; Racial studies ; Milkfish ; India ; Chanos chanos
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    Format: application/pdf
    Format: application/pdf
    Format: 181-192
    Format: 12
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26147 | 17342 | 2019-01-22 05:22:51 | 26147 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: The paper reports the results of experimental rearing of milkfish fry in both fresh and brackishwater ponds in Sarawak. Date on the growth and survival of these imported fry are also given.
    Keywords: Aquaculture ; Rearing ; Aquaculture techniques ; Fry ; Freshwater aquaculture ; Brackishwater aquaculture ; Milkfish culture ; Pond culture ; Fish ponds ; Growth ; Survival ; Sarawak ; Malaysia ; Milkfish ; Chanos chanos
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 160-161
    Format: 2
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26144 | 17342 | 2019-01-22 05:49:50 | 26144 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: Milkfish is one of the most important food fishes in Taiwan. There are more than 16,000 ha of culture area and over 160 millions of fry are needed for milkfish farming industry every year. The fry are collected from the sea and also imported from other countries. However, due to several environmental factors, there is unpredictable fluctuations in the occurrence of these wild fry. In recent years, the demand for milkfish fry has gone up considerably owing mainly to the fast-growing populations, the natural resources being so limited that there is insufficient supply of stocking materials of this important foodfish. To solve the problem of shortage of milkfish fry, Tungkang Marine Laboratory started the preliminary work on artificial propagation of milkfish in 1970. In addition to capturing wild spawners, the Laboratory has also been raising the adult milkfish in tanks for this objective. After being reared for six years, one male and one female were dissected on 11 April 1976. The male had ripe sperms; the testes weighing 4.63 g with the GSI of 0.12. The gonad of the female weighed 21.20 g with the GSI of 0.66 and part of the ovarian oocytes was found to be at the oil droplet (yolk vesicle) stage. Judging from the condition of maturity of the above female, the feasibility of raising tank-reared spawners was ensured. It is believed that this is the first attempt on the world and is the prelude to successful artificial propagation by using tank-reared milkfish as spawner.
    Keywords: Aquaculture ; Biology ; Gonads ; Animal reproductive organs ; Food fish ; Milkfish culture ; Seed collection ; Fry ; Fish larvae ; Seed (aquaculture) ; Environmental factors ; Induced breeding ; Brood stocks ; Biological development ; Sexual maturity ; Sperm ; Fecundity ; Gonadosomatic index ; Culture tanks ; Milkfish ; Chanos chanos
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    Format: application/pdf
    Format: 121-132
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26146 | 17342 | 2019-01-22 05:37:43 | 26146 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: The program objective is to breed the milkfish, Chanos chanos (Forskal), in captivity and to raise the fry from the egg, undertaking any research and development which may be necessary to attain that goal. In this, the first year of the project, eight very mature fish were captured and deemed ready for final spawning inducement. One fish (with eggs 0.818 mm in diameter) hydrated and was partially ovulated by two injections of 25 mg salmon gonadotrophin SG-G100. The eggs were not fertilized. The injection procedure or excessive handling and sampling of three other fish resulted in early atresia (reabsorption) of the oocytes. Two fish died from the sampling and handling procedures, and two proved to be too immature with eggs below 0.6 mm in diameter. Preliminary results indicate that oocytes of 0.8 mm and above are at a critical stage (or beyond) at which immediate hypophysation is needed. Injection cannot be delayed. Excessive handling or stress at this stage causes rapid atresia of the oocytes. It appears that oocytes of about 0.7 mm are more suitable for reacting positively to injections. The size of an ovulated egg is about 1.2 mm in diameter. The level and dose rate of SG-G100 used for mullet (20) µg/g body weight) appears too high for the milkfish. A dose of between 12 and 15 µg/g body weight is suggested at present. A resident population of adults of varying ages, numbering over 50 fish, has been assembled. Some were brought from the island of Hawaii to Oahu by land and sea involving 18 hours of travel. All survived the journey. Consequently a small operating satellite field center has been established on Hawaii. A total of 179 dead adult fish have been used for future compilation of age, weight/length, GSI, scale and otolith data. All of the samples are stored. Determination of the GSI for Hawaiian fish indicated a rapid maturation of oocytes and spermatids in June, with a peak spawning period in July and early August. Adult fish have been placed under photoperiod and temperature-regulated conditions to promote maturation out of season. General husbandry methods have been developed for adults in captivity, and a diet formulated which appears to be acceptable. The work on health care is proving to be very informative. Safe handling systems have been developed using ice, and hypotheses made for the results of this treatment and general conditions of stress. Autopsies on dead fish have revealed growths and evidence of heart attack and gastritis. Techniques using commercially available human clinical test kits are proving useful indicators of stress; for example, the presence of hemoglobin and ketones in the mucus increases with stress. Eye lens protein analyses are being undertaken to determine any different racial origins of milkfish.
    Keywords: Aquaculture ; Biology ; Fisheries ; Milkfish culture ; Induced breeding ; Fry ; Spawning ; Oocytes ; Gonadosomatic index ; Sex hormones ; Light effects ; Photoperiodicity ; Temperature effects ; Artificial feeding ; Sexual maturity ; Brood stocks ; USA ; Milkfish ; Chanos chanos
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 139-159
    Format: 21
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26145 | 17342 | 2019-01-22 05:45:33 | 26145 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: A simple method is described for monitoring the spawning activity of fish held in suspended net enclosures. The method, which involves an airlift pump, has been used successfully with the threadfin, Polydactylus sexfilis, and has revealed important aspects of the daily, monthly and yearly spawning rhythms of this species. It is suggested that this approach may be useful in studies of Chanos chanos.
    Keywords: Aquaculture ; Milkfish culture ; Spawning ; Cage culture ; Aquaculture equipment ; Reproduction ; Culture tanks ; Reproductive behaviour ; Fish eggs ; Milkfish ; Chanos chanos ; Polydactylus sexfilis
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 133-138
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    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26213 | 17342 | 2019-02-01 08:38:06 | 26213 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-24
    Description: The paper provides a comprehensive list of endangered freshwater, brackishwater, and marine aquatic species in Thailand. The Thai Department of Fisheries is breeding some of the endangered species under the “Rehabilitation of Thai Local Fishes and Aquatic Animals Project.” Some of these species are bred for restocking in the wild.
    Keywords: Aquaculture ; Fisheries ; Resource conservation ; Resource management ; Habitat ; Habitat loss ; Rare species ; Nature conservation ; Protected resources ; Rare resources ; Threatened species ; Vulnerable species ; Freshwater crustaceans ; Freshwater fish ; Freshwater invertebrates ; Freshwater molluscs ; Freshwater organisms ; Marine organisms ; Marine fish ; Marine molluscs ; Marine crustaceans ; Brackishwater crustaceans ; Brackishwater fish ; Brackishwater molluscs ; Brackishwater organisms ; Stocks ; Depleted stocks ; Fishery resources ; Stock assessment
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 131-137
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