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标题：Effect of temperature on the metabolism, behaviour and oxygen requirements of Sparus aurata
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作者：Mette Remen ; Marit A. J. Nederlof ; Ole Folkedal 等
期刊名称：Aquaculture Environment Interactions
印刷版ISSN：1869-215X
电子版ISSN：1869-7534
出版年度：2015
卷号：7
期号：2
页码：115-123
出版社：Inter-Research
摘要：We investigated the effect of temperature on the limiting oxygen saturation (LOS) of gilthead sea bream Sparus aurata. This threshold was defined as the % O₂ saturation where fish no longer upheld their routine metabolic rate (RMR, the metabolic rate of fed and active fish) during a progressive decline in oxygen saturation. S. aurata (398 ± 10 g, mean ± SE) were kept in 3 replicate tanks and subjected to 3 changes in temperature: 16 to 20°C, 20 to 16°C and 16 to 12°C. At each temperature, fish were left to acclimatize for 8 to 10 d, before daily feed intake (DFI), the routine oxygen consumption rate (routine MO₂, mg kg^-1 min^-1) and the LOS were measured. In addition, at 20°C the swimming speed was measured in fish subjected to a decline in O₂ from full air saturation to levels below the LOS (minimum of 8-10% O₂). For the temperature range tested (12-20°C), DFI, MO₂ and LOS increased exponentially with temperature (7.5-, 3.6- and 2.2-fold, respectively) with mean (± SE) LOS being 17 ± 1, 21 ± 0 and 35 ± 5% O₂ at 12, 16 and 20°C, respectively. A gradual decline in swimming activity was observed as O₂ declined below the LOS, indicating increasing metabolic stress and/or a ‘sit-out’ coping strategy which may prolong survival time in severe hypoxia. The results show the importance of temperature as an influential variable over the environmental O₂ requirements of S. aurata.
关键词：Hypoxia ; Aquaculture ; Metabolism ; Behaviour ; P_crit ; S_crit ; Oxygen threshold ; Feeding rate ; Temperature