Critical swimming speed: its ecological relevance
Critical swimming speed: its ecological relevance
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DOI：
10.1016/s1095-6433(01)00462-7
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发表时间：
2001-12-01
影响因子：
2.3
通讯作者：
Plaut, I
中科院分区：
文献类型：
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作者：
Plaut, I
临界游泳速度（U-crit）是衡量鱼类游泳能力的标准。为了进行这种测量，将鱼引入水洞中，其中水流速度可以由研究者控制。在测量开始时，水流速度较低，约为1体长（BL）s（-1），然后以规定的间隔逐渐增加。鱼倾向于在水洞中保持自己的位置，直到疲劳开始。利用鱼类疲劳的时间和速度来计算临界游动速度。该程序广泛用于评估环境条件和污染物对鱼类性能的影响。由于该程序是在远不能代表鱼类所经历的大多数自然环境的条件下进行的，因此对其生态和生态生理学相关性提出了质疑。很少有研究考察临界游泳速度和似乎更生态相关的特征之间的相关性。相关分析表明，U-压积与常规活动、开阔水域鱼类的代谢率和体尺、代谢率和体尺呈正相关。这些数据间接表明生态相关的U-压积，但直接测量U-压积生殖成功或生存需要评估这种相关性。(C)2001 Elsevier Science Inc. All rights reserved.
Critical swimming speed (U-crit) is a standard measurement to assess swimming capabilities of fishes. To conduct this measurement a fish is introduced into a water tunnel in which the current velocity can be controlled by the investigator. At the beginning of the measurement water velocity is low, approximately I body length (BL) s(-1), and is then incrementally increased at prescribed intervals. Fishes tend to maintain their position in the water tunnel against the current until fatigue sets in. The time and velocity at which the fish fatigue are used to calculate the critical swimming speed. This procedure is widely used to assess the effects of environmental conditions and pollutants on fish performance. Since the procedure is conducted in conditions that are far from representing most natural environment experienced by fishes, doubts have been raised about its ecological and ecophysiological relevance. Few studies examined correlations between critical swimming speed and traits that seem to be more ecologically relevant. Positive correlations were found between U-crit and routine activity, metabolic rates and body size of open water, planktivorous fishes, metabolic rates and body size. These data indirectly suggest ecological relevancy of U-crit, but direct measurements relating U-crit to reproductive success or survival are required to assess such relevancy. (C) 2001 Elsevier Science Inc. All rights reserved.