Acoustic telemetry versus monitored longline fishing for studying the vertical distribution of pelagic fish: bigeye tuna (Thunnus obesus) in French Polynesia
Acoustic telemetry versus monitored longline fishing for studying the vertical distribution of pelagic fish: bigeye tuna (Thunnus obesus) in French Polynesia
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DOI：
10.1016/s0165-7836(02)00180-7
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发表时间：
2003-02
影响因子：
2.4
通讯作者：
P. Bach;L. Dagorn;A. Bertrand;E. Josse;C. Misselis
中科院分区：
文献类型：
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作者：
P. Bach;L. Dagorn;A. Bertrand;E. Josse;C. Misselis
这项研究比较详细的，几乎连续的，观察大眼金枪鱼，Thunnus obesus配备了电子标签，离散观察大量的个人从捕捞实验，以验证使用仪器延绳钓研究鱼类的垂直分布。我们表明，从两种不同的观测技术，就不同的环境变量（温度，溶解氧（DO），猎物分布）的深度分布是相似的。大眼金枪鱼似乎不受垂直方向鱼饵的吸引（渔具没有改变鱼饵的垂直分布），因此可以使用仪器延绳来研究中上层鱼种的垂直行为。这种技术，当使用适当的部署策略，因此，可以代表一种替代电子标签（声学或档案标签）时，有必要确定鱼类的垂直分布的大小或性别，在不同的环境中的渔业相互作用的研究。
This study compares detailed, nearly continuous, observations on bigeye tuna, Thunnus obesus equipped with electronic tags, with discrete observations on a larger number of individuals from fishing experiments in order to validate the use of instrumented longlines to study the vertical distribution of fish. We show that the depth distributions obtained from the two different observation techniques regarding different environmental variables (temperature, dissolved oxygen (DO), prey distribution) are similar. Bigeye tuna do not seem to be attracted by baits in the vertical dimension (no modification of their vertical distribution by the fishing gear), which allows the use of instrumented longlines to study the vertical behaviour of pelagic species. This technique, when used with appropriate deployment strategy, could therefore represent an alternative to electronic tags (acoustic or archival tags) when there is a need to determine the vertical distribution of fish species by size or sex, in different environments for the study of fishery interactions.