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No Thumbnail AvailableProjectProgramme / project reportSouth China sea fisheries development and coordinating programme. Preliminary fish seed resources survey along the coast of Peninsular Malaysia 1978
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No Thumbnail AvailableProjectProgramme / project reportPreliminary studies on the effects of fresh and fermented pig manure on fish production
Network of Aquaculture Centres in Asia
1988Also available in:
No results found.The growth of several cultivated fishes of Cyprinidae was studied using cognate fresh and fermented pig manure and the equivalent fertilizers N and P as sole inputs to different experimental groups of fish ponds. Experiment I was conducted from June to October 1986, experiment II from March to October 1987. The proportions of fish production from chemical-fertilized ponds (C), fermented pig manured ponds (F1), and fresh pig manured ponds (F2) were 100:156:226 and 100:294:382 respectively. The ratio of fish production of F1 ponds to F2 ponds was 100 to 145 in experiment I and 100 to 130 in experiment II, respectively.The chlorophyl content, zooplankton biomass, bacterial activity and BOD were lower in the C ponds than in the F1 and F2 ponds, while the DO concentration was higher. There was little difference in the concentration of NH4-N and PO4-P among the experimental ponds. The physico-chemical parameters in the F1 and F2 ponds were not always in conformity with the fish production. Some parameters were contradictory in these two experiments. In the experiment I, the content of NH4-N in the F1 ponds was lower than that in the F2 ponds, and the content of chlorophyl and the biomass of zooplankton in the F1 ponds were greater than those in the F2 ponds. In contrast, in experiment II all these three parameters were reversed in the F1 and F2 ponds. These results indicate that part of the fish production in the C ponds came from the natural planktonic food chain, while in the F1 and F2 ponds, much of the production was derived from the manure detritus as well as from the planktonic food chain. The nutrient value of fermented pig manure is probably less than that of fresh manure because of bacterial decomposition during fermentation. There is a complicated relationship among various physico-chemical factors after manure application in the F1 and F2 ponds. -
ProjectProgramme / project reportIndia - A chilled seawater (CSW) system for fishing and carrier vessels engaged in the small pelagic species fishery of southwest India. A report prepared for the pelagic fishery investigation on the southwest coast - phase II - project. Field document 1
Pelagic Fishery Investigation on the South-West Coast, India, IND/75/038
1980Also available in:
No results found.Chilled seawater systems are a comparatively recent innovation. The Consultant was familiar with progress made on the Pacific coast of Canada where the development of systems for salmon and herring transport and storage has been intensive and CSW systems are now the most common method for short-term preservation of fish. Several attempts were made to introduce the handling of sardine and mackerel in shallow plastic boxes, which is the standard procedure in the Mediterranean sardine industry, and quality results were excellent. This method of handling did not, howeve~ prove practical for commercial use since the fishermen are used to handling in bulk and on deck. Moreover, refrigerated seawater systems were unfeasible not only as the capital cost was prohibitive for installation in the small vessels (30-45 ft), but also because they presented technical problems of maintenance and operation beyond the capabilities of the fishermen. Thus, it appeared that a chilled seawater system would i deally suit the present conditions of the growing purse seine industry of southwest India
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