Studies on breeding and seed production of the new species of fish with high commercial value
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Aquaculture contributes significantly to food production and provides the means to generate increased revenue for countries in Southeast Asia. As the catch from the capture fisheries stagnate and population growth rate in the region continue to be among the highest in the world, the requirement for cheap sources of protein is expected to come from increased production of low trophic level species such as milkfish (Chanos chanos) and tilapia (Oreochromis spp.). There is also an increasing demand for high value fish species such as groupers and snappers particularly for the live food fish markets of affluent and developing countries in Asia. In order to meet the demand for more food fish and to develop new products for the export market, the most important component of any culture system must be met - that of adequate supply of fry and juveniles for culture Fry availability has been a major constraint in the development of culture systems for new species and in further increasing production of established culture species. The SEAFDEC Aquaculture Department is addressing the problem of fry availability through its research on breeding and seed production of several marine species. To date, commercially viable technologies for breeding and. seed production of milkfish, sea bass (Lates calcarifer) and rabbitfish (Siganus guttatus) have been developed and continue to be refined. Captive breeding and experimental hatchery production of grouper (Epinephelus coiodes) and the mangrove snapper (Lutjanus argentimaculatus) have also been achieved. Another major focus of SEAFDEC AQD’s research is the development of breeding and seed production technologies of endangered marine species such as the sea horse (Hipocampus spp.) and other marine ornamental fish. The Philippines and other Southeast Asian countries are the major suppliers of marine ornamental fish for the aquarium trade and for medicinal use. These fish species are caught from coral reefs and seagrass beds using destructive fishing techniques such as cyanide fishing that has resulted in the destruction of vast areas of the marine coastal environment. Captive breeding of these endangered species will pave the way for future restocking and conservation programs to ensure their survival. This paper provides an overview of research accomplishments in marine fish breeding and seed production, current activities, and future directions for research at SEAFDEC AQD.
In: Studies on Sustainable Production Systems of Aquatic Animals in Brackish Mangrove Areas [Ibaraki, Japan]: Japan International Research Center for Agricultural Sciences. pp. 30-41
PublisherJapan International Research Center for Agricultural Sciences
Finfishes; Milkfish culture; Sea bass culture; Rabbitfish culture; Grouper culture; Snapper culture; Breeding; Seed production; Aquarium fishes; Philippines; Snappers; Red snapper; Mangrove red snapper; Milkfish; Rabbitfish; Groupers; Sea bass; Lutjanus argentimaculatus; Chanos chanos; Lates calcarifer; Epinephelus coioides
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BookEB Coniza, MR Catacutan & PA Caballero - 2012 - Aquaculture Department, Southeast Asian Fisheries Development Center
Series: Aquaculture extension manual; No. 53The mangrove red snapper is among the high-value marine fishes with great potential for export. Snapper is important to coastal fishery and ideal for aquaculture particularly in Southeast Asia. Grow-out culture of snapper are described - pond culture and culture in cages inside the ponds. In the pond culture, the whole area can be maximized and the available natural food can be utilized by snapper. In rearing snapper in cages inside the pond, fish sampling and harvesting are easily done and also in preventing of disease infection and securing of fish stocks during flooding. In both culture methods a good site would have a mangrove buffer space about 20-100 m that lies between the ponds and the source of water like river or sea. Pond soil with a good water retention property is desirable for dike construction. Water supply should be adequate year-round, free from pollutants and run-off flooding. Pond supplies, labor and technology should be available on the selected site which is also accessible to markets with peaceful locale. The pond for growing snapper should be prepared well in order to promote good growth of fish, to minimize pollution, and prevents the proliferation of pathogens. Stocking of healthy and larger uniform size juveniles will mean higher survival, faster growth and shorter culture period. Proper handling of juveniles during harvest, size-grading, counting, packing, transport, acclimation and stocking should be observed and should be done during the cooler part of the day. Recommended juveniles for grow-out is about 20-100 g average body weight (ABW) and stocking densities of 5,000/ha in ponds, and at 5 pcs/m3 or 5,000 pcs/ha when stocked in cages inside the pond. During culture, good water quality is maintained and when necessary the cleaning of net cages, repair of dike leaks and seepages, and aeration are to be considered. Snapper dietary protein is about 48-50%. The following are the factors to consider in the feeding management of snapper: total stock (pcs), survival (%), ABW (g), feed rate (% biomass), feed type, feed size, feeding frequency and time. Economic analysis based on 0.422 ha pond shows that feeds accounted for 60-67% and juveniles contribute 23-25% of the variable cost. The feed conversion ratios, return on investments, payback period and discounted benefit-cost ratios are 2.5 and 2.6; 203 and 43%; 0.46 and 1.76 yr; 1.4 and 1.2 for culture of snapper in pond and culture in cages inside the pond, respectively, are likewise acceptable.
BookJ Madrones-Ladja, N Opiña, M Catacutan, E Vallejo & V Cercado - 2012 - Aquaculture Department, Southeast Asian Fisheries Development Center
Series: Aquaculture extension manual; No. 54This extension manual describes nursery pond requirements, nursery rearing procedures, common diseases of young marine fish, and economic analysis of cage nursery as an enterprise separate from hatchery and grow-out culture.