Influence of temperature, oxygen and salinity on the metabolism of the European sea bass
Influence of temperature, oxygen and salinity on the metabolism of the European sea bass
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DOI：
10.1016/s1385-1101(99)00019-2
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发表时间：
1999-09-01
影响因子：
2
通讯作者：
Lagardère, JP
中科院分区：
文献类型：
--
作者：
Claireaux, G;Lagardère, JP
标准（SMR）和常规（RMR）代谢率组（4至5个人）的欧洲海鲈鱼（Dicentrarchus labrax）进行了测量，在以下因素的组合：温度（10，15，20和25摄氏度），氧含量（空气饱和度为1.5毫克dm（-3））和盐度（30，20，10和5份千分之一）。然后通过方差分析分析这些环境条件对鱼类代谢需求的影响。在10、15、20和25摄氏度时，标准代谢率分别为36、65、89和91 mg O-2 kg（-1）h（-1），而常规耗氧量涵盖了大部分代谢范围。渗透调节成本与通过通气的代谢活动有关。环境盐度和温度之间的相互作用突出了这种关系。然而，我们无法检测盐度和常规代谢率之间的相互作用，或盐度和氧合水平之间的相互作用。为了更准确地描述水体充氧对鱼类代谢性能的限制，我们测定了各实验温度下的极限氧浓度曲线。我们随后通过模拟低音活跃代谢率（AMR）和代谢范围（MS）作为环境温度和氧合的函数。这些数学模型允许的控制和限制的影响，水温和氧含量的物种的代谢能力的特点。因此，在10、15和20 ℃下的AMR估计分别为65、160和360 mg O-2 kg（-1）h（-1）。然而，在较高的温度（25摄氏度）AMR略有下降（至340毫克O-2公斤（-1）小时（-1））。低音MS在10至20摄氏度之间增加了9倍，但在更高的温度下减少。本研究有助于我们目前的理解环境因素对鲈鱼的代谢的影响，并提供了一个生物能量学的基础上，研究环境约束如何管理的空间和时间分布格局的这个物种。(C)1999 Elsevier Science B. V.保留所有权利。
Standard (SMR) and routine (RMR) metabolic rates of groups (4 to 5 individuals) of European sea bass (Dicentrarchus labrax) were measured at combinations of the following factors: temperature (10, 15, 20 and 25 degrees C), oxygenation level (air saturation to 1.5 mg dm(-3)) and salinity (30, 20, 10 and 5 parts per thousand). The influence of these environmental conditions on fish metabolic demand was then analysed through ANOVA. At 10, 15, 20 and 25 degrees C, standard metabolic rates were 36, 65, 89, and 91 mg O-2 kg(-1) h(-1), respectively, while routine oxygen consumptions covered most of the metabolic range accessible. Osmoregulatory costs are linked to metabolic activity through ventilation. This relationship was highlighted by the observed interaction between environmental salinity and temperature. We were, however, unable to detect interactions between salinity and routine metabolic rate, or between salinity and oxygenation level. In order to delineate mon precisely the restrictions imposed by water oxygenation on fish metabolic performance we determined the limiting oxygen concentration curves at each experimental temperature. We followed up by modelling the bass active metabolic rate (AMR) and metabolic scope (MS) as functions of both ambient temperature and oxygenation. These mathematical models allowed the characterisation of the controlling and limiting effects of water temperature and oxygen content on the metabolic capacity of the species. Thus, AMR at 10, 15 and 20 degrees C were estimated at 65, 160 and 360 mg O-2 kg(-1) h(-1), respectively. However, at higher temperature (25 degrees C) AMR dropped slightly (to 340 mg O-2 kg(-1) h(-1)). Bass MS increased by a factor of 9 between 10 and 20 degrees C, but diminished at higher temperatures. The present study contributes to our current understanding of the influences of environmental factors on the metabolism of sea bass and provides a bioenergetic basis for a study of how environmental constraints govern the spatial and temporal distribution pattern of this species. (C) 1999 Elsevier Science B.V. All rights reserved.