We tested the ability of venting and descender (recompression) devices to increase the relative survival of released Black Sea Bass Centropristis striata, a physoclistous reef species with high discard rates in hook‐and‐line fisheries that operate in the U.S. Atlantic Ocean and Gulf of Mexico. We caught fish via hook and line from waters that were 38 m deep, a depth where Black Sea Bass often exhibit signs of barotrauma and may be unable to submerge after release. Fish were conventionally tagged and vented with either an 11‐gauge cannula or a 16‐gauge needle, descended using a descender (recompression) device, or released as tagged controls (no venting or recompression). Tests of independence were used to determine the relationship between submergence and treatment (excluding recompressed fish) as well as between submergence and tag return rate. Tag‐recapture data were used to inform a Cox proportional hazards model that evaluated the survival of fish treated with each experimental device relative to the control group. A significantly greater proportion of fish submerged when treated with either venting device relative to the controls, and the fish that submerged had a greater proportion of tag returns relative to those that did not submerge. Venting and recompression increased postrelease survival compared with the controls. The results provide guidance to managers who seek methods to reduce discard mortality rates in hook‐and‐line fisheries for this important species. Future studies should examine the use of these devices at a range of depths to determine their effectiveness.

中文翻译：

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排气和下降装置的功效在黑海鲈释放后生存率提高的情况下

我们测试了排气和下降（再压缩）装置增加释放的黑鲈鱼Centropristis纹状体的相对存活的能力是在美国大西洋和墨西哥湾作业的钩钓渔业中丢弃率高的浮游珊瑚礁物种。我们通过钩和线从深38 m的水域中钓到鱼，该深度处黑海鲈鱼经常表现出气压伤的迹象，放出后可能无法淹没。通常用11口径的插管或16口径的针对鱼进行标记和排放，使用下降器（减压）装置下降，或作为标记的对照释放（不排放或再压缩）。使用独立性测试来确定淹没与处理（不包括压缩鱼）之间的关系以及淹没与标签返回率之间的关系。标签捕获数据用于告知Cox比例风险模型，该模型评估了每种实验设备相对于对照组处理的鱼的存活率。与对照相比，用任一通风装置处理时，淹没的鱼类比例要大得多，并且被淹没的鱼类的标签回报率要高于未淹没的鱼类。与对照组相比，通气和再压缩增加了释放后的存活率。研究结果为管理者提供了指导，他们寻求方法来降低这种重要种类的钩钓渔业中的丢弃物死亡率。未来的研究应深入研究这些设备的使用，以确定其有效性。与对照相比，用任一通风装置处理时，淹没鱼的比例要大得多，并且被淹没的鱼的标签返还率要高于未淹没的鱼。与对照组相比，通气和再压缩增加了释放后的存活率。研究结果为管理者提供了指导，他们寻求方法来降低这种重要种类的钩钓渔业中的丢弃物死亡率。未来的研究应深入研究这些设备的使用情况，以确定其有效性。与对照相比，用任一通风装置处理时，淹没鱼的比例要大得多，并且被淹没的鱼的标签返还率要高于未淹没的鱼。与对照组相比，通气和再压缩增加了释放后的存活率。研究结果为管理者提供了指导，他们寻求方法来降低这种重要种类的钩钓渔业中的丢弃物死亡率。未来的研究应深入研究这些设备的使用，以确定其有效性。研究结果为管理者提供了指导，他们寻求方法来降低这种重要种类的钩钓渔业中的丢弃物死亡率。未来的研究应深入研究这些设备的使用，以确定其有效性。研究结果为管理者提供了指导，他们寻求方法来降低这种重要种类的钩钓渔业中的丢弃物死亡率。未来的研究应深入研究这些设备的使用，以确定其有效性。