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Resume Modcling of resistance to salinity shocks of Prizaeus rannamci postlarvae. The notion of penaeid shrimp postlarvae quality, which implics a survival potential, is still a subjective parameter. Tlic zootcchnical criteria and the visual observations arc not sufficicnt to cvaluate the physiological condition of the hatchcry rcarcd postlarvae. The resistance of postlarvae to salinity shocks is a rcprcscntative criteria of their condition. The goal of this study is to present a non-linear regression modcl at 2 variables (sizc, salinity) for the P. vannamei postlarvae rcsistancc to salinity shocks. Between the second and the twcnticth day after metamorphosis; 5 salinity shocks (20, 15, 10, 5 and 2'/,,) were tested daily, each one with 50 postlarvac. Survival rates were recorded after 2 hrs. Concurrently, thc postlarvac growth in the rearing tank was studicd by thc daily mcasurcment of 30 individuals. The survival to thc salinity shocks improves with the size which increases linearly.

Modélisation de la résistance aux chocs de salinité des postlarves dePenaeus vannamei