Use of crude salt in rearing of freshwater giant prawn, Macrobrachium rosenbergii (de Man) larvae
Three different types of culture media: (i) 100% brine (B 100 ), (ii) 75% brine and 25% crude salt (B 75 CS 25 ), and 50% brine and 50% crude salt (B 50 CS 50) were tested to evaluate the possible use of brackish water reconstituted from the crude salt for the production of M. rosenbergii post-larvae. The production rate of 25.26±0.20 PI/l with a corresponding survival rate of 84.20±0.66% was significantly higher (P<0.05) for the larvae reared on B100 than that of 22.10±0.57 Pl/l with a corresponding survival rate of 73.68±1.89% on B50CS50. Larvae cultured on B75CS25 did not show any significant difference (P<0.05) in production as well as in survival of post-larvae than that on B100. The result shows that, for rearing of prawn larvae, use of brine can be replaced up to 25% without any undue reduction in production of post-larvae. However, the production as well as survival rate of post-larvae with 50% replacement (B50CS50) is also appreciable. It is assumed that the mineral constituents of natural seawater might have some triggering effects on prawn larvae in closing their larval cycle.
| Main Authors: | , , |
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| Format: | article biblioteca |
| Language: | English |
| Published: |
2003
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| Subjects: | Biology, Fisheries, M. rosenbergii, Larvae, Crude salt, |
| Online Access: | http://hdl.handle.net/1834/33153 |
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