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Osmotic stress resistance as a quality diagnostic for penaeid postlarvae
Rees, J.F.; Curé, K.; Piyatiratitivorakul, S.; Menasveta, P.; Sorgeloos, P. (1994). Osmotic stress resistance as a quality diagnostic for penaeid postlarvae, in: Chou, L.M. et al. (Ed.) The 3rd Asian Fisheries Forum. pp. 1025-1028
In: Chou, L.M. et al. (Ed.) (1994). The 3rd Asian Fisheries Forum. Asian Fisheries Society: Manila. , meer
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| Auteurs | | Top |
- Rees, J.F., meer
- Curé, K., meer
- Piyatiratitivorakul, S.
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- Menasveta, P.
- Sorgeloos, P., meer
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| Abstract |
Penaeus monodon postlarvae (PL-5) were reared for 10 days on Artemia nauplii enriched with various levels (2.65, 5.30, 12.60, 22.35 and 31.20 mg/g DW) of (n-3) highly unsaturated fatty acids (HUFA). On day 5 and 10, their resistance to osmotic shocks (transfer from 30 ppt to 0, 5, and 10 ppt diluted seawater) was analyzed. After 5 days, postlarvae fed Artemia containing 12.6 mg/g (n-3)HUFA or more had a significantly higher resistance (p<0.05) than controls. Five days later, no significant difference could be detected among the treatments. A positive correlation was found between the stress resistance of PL-10 and the survival recorded five days later in each tank (p<0.02). It is concluded that the resistance to osmotic stress is a valuable quality indicator for penaeid postlarvae. On the other hand, neither growth rate, nor their size can be considered adequate quality criteria. |
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