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首页> 外文期刊>ICES Journal of Marine Science >Application of three-dimensional acoustic telemetry to assess the effects of rapid recompression on reef fish discard mortality
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Application of three-dimensional acoustic telemetry to assess the effects of rapid recompression on reef fish discard mortality

机译：三维声遥测技术在评估快速再压缩对珊瑚鱼丢弃物死亡率的影响中的应用

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摘要

Geopositioning underwater acoustic telemetry was used to test whether rapid recompression with weighted return-to-depth (descender) devices reduced discard mortality of red snapper (n=141) and gray triggerfish (n=26) captured and released at 30-60m depths at two 15km(2) study sites in the northern Gulf of Mexico. Cox proportional hazards modelling indicated red snapper released with descender devices had significantly lower discard mortality within the first 2d (95% CI = 18.8-41.8% for descender-released vs. 44.0-72.4% for surface-released, unvented fish), while there was no significant effect of descender devices on discard mortality of gray triggerfish. Predation by large pelagic predators was estimated to account 83% of red snapper and 100% of gray triggerfish discard mortality. Discard mortality due to predation has likely been overlooked in previous mark-recapture, laboratory, and enclosure studies, suggesting cryptic population losses due to predation on discards may be underestimated for red snapper and gray triggerfish. Large-area three-dimensional positioning acoustic telemetry arrays combined with collaboration and data sharing among acoustic telemetry researchers have the potential to advance our knowledge of the processes affecting discard mortality in reef fishes and other taxa.
机译：地理定位水下声遥测技术用于测试在30-60m深度处捕获并释放的红鲷鱼（n = 141）和灰色引金鱼（n = 26）的丢弃率，并通过加权深度返回（下降）设备进行快速重新压缩是否降低。在墨西哥湾北部的两个15公里（2）研究地点。考克斯比例风险模型表明，使用下降装置释放的红鲷鱼在头2天内丢弃率显着降低（下降释放的95％CI = 18.8-41.8％，表面释放的无通风鱼类的44.0-72.4％）下降装置对灰色引金鱼的丢弃死亡率无显着影响。大型中上层捕食者的捕食估计占红鲷鱼的83％和灰色引金鱼丢弃率的100％。在先前的标记回收，实验室和围捕研究中，可能会忽略因捕食而造成的丢弃物死亡率，这表明对于红鲷鱼和灰色trigger鱼而言，因捕食而造成的隐性种群损失可能被低估了。大面积三维定位声学遥测阵列，以及声学遥测研究人员之间的协作和数据共享相结合，有可能增进我们对影响礁鱼和其他类群丢弃物死亡率的过程的了解。

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