Combined effect of temperature and salinity on the Thermotolerance and osmotic pressure of juvenile white shrimp litopenaeus vannamei (Boone)

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• 作者：Ana Denisse Re^a ; ^{denisre@cicese.mx} ; ^{denise_re2004@yahoo.com} ; Fernando Dí ; az^a ; Elizabeth Ponce-Rivas^b ; Ivonne Giffard^c ; Ma.Enriqueta Muñ ; oz-Marquez^d ; Hector M. Sigala-Andrade^b
• 关键词：Salinity ; Temperature ; CTMax ; Osmotic pressure ; Litopenaeus vannamei
• 刊名：Journal of Thermal Biology
• 出版年：2012
• 期刊代码：100_03064565
• 类别：bio
• 出版时间：October, 2012
• 卷：37
• 期：6
• 页码：413-418
• 文件大小：386 K

摘要

Thermotolerance (CTMax) was determined in L. vannamei in three salinities and five acclimation temperatures 20, 23, 26, 29 and 32 掳C. In white shrimp, the CTMax was not significantly affected by salinity (P>0.05). A direct relationship was obtained between CTMax and acclimation temperature. The end point of the CTMax in L. vannamei exposed to different combinations of temperature and salinity was defined as the loss of the righting response (LRR). The acclimation response ratio (ARR) for the juveniles of white shrimp ranged from 0.42 to 0.49; values in agreement with other crustaceans from tropical and sub tropical climates. The osmotic pressure of the hemolymph was measured in control organisms and in organisms exposed to CTMax; significant differences were found in organisms maintained in 10 and 40 psu, but there were no significant differences in hemolymph osmotic pressure in those that were acclimated to 26 psu.