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DocumentControl of Salting Schedule and its Effect on the Quality and Storage Life of Cured Fish 1998
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No Thumbnail AvailableProjectThe use of rock salt, sea salt, rock salt brine and salt stock solution for larval culture of Macrobrachium rosenbergii 1980
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No results found.The demand for giant freshwater prawns has increased considerably in domestic and foreign markets. This has resulted in higher prices and thus categorized prawns as an aquatic animal of great economic value. Many people have taken up prawn farming as their profession. Normally all larval stages require brackish water. Specimens reared in pure freshwater all die within a few days. After metamorphosis freshwater should be provided for them until they are fully grown - ready for mating and egg-layi ng, then they have to be introduced once more into brackish water. Therefore, prawn farms which have to cater for breeding, hatching and rearing should preferably be situated near the sea since, transportation of seawater to a farm located far away from the sea costs a lot of expenses. In order to eliminate factors that limit production in the field of breeding and rearing of juvenile prawns, a research, training and development project on giant freshwater prawns has been carried out by the Chacheongsao Fisheries Station, Freshwater Fisheries Division, Fisheries Department. The work described in this paper reports the result of an experiment where rock salt, sea salt and north-eastern brine were successfully mixed with freshwater and salt stock solutionc to rear larvae. The mixture ratio has to be appropriate to the quantity of mineral salts required for the breeding and rearing of juvenile prawns so that it simulates the mixture of seawater and freshwater used normally. Success in this work would reduce considerably the cost of transportation of seawater to the farm. It is hoped that in the future the successful result obtained from this experiment would be utilized in breeding and culturing of giant freshwater prawn all over Thailand, in particular in the north-eastern part of Thailand, where plenty of rock salt and brine can be obtained for this purpose. -
No Thumbnail AvailableProjectBrine shrimp (Artemia salina) inoculation in tropical salt ponds: a preliminary guide for use in Thailand 1979
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No results found.This work paper is prepared in view of the wish of the Thai Department of Fisheries to inoculate salt ponds with Artemia salina to produce cysts. Artemia cysts are used to obtain live food in many aquacultural operations, but especially in the hatchery of the giant freshwater prawn, Macrobrachium rosenbergii. These inoculations, if successful, could encourage the Thai Government in the future to conduct experiments in large-scale cyst production. Indeed, up to this date, Thailand completely de pends on import of expensive Artemia cysts from abroad. The yearly expenditure in cysts by the Department of Fisheries for the national fisheries stations, is estimated to be more than US$50 000. The inoculation ponds considered are: (i) ponds in the National Fishery Station at Samut Sakhorn (still to be completed), and (ii) privately-owned salt ponds of salt farmers in the vicinity of the National Fishery Station at Chachoengsao. Although previously, several inoculations in other parts of t he world have proven to be successful, no written guides are yet available. Trial inoculations in Thailand being considered important, the necessity was felt to gather all available information on Artemia inoculations and cyst production into one working paper to serve as guide on improving the chances of a successful experiment.
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