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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Simulated catch-and-release using experimental hyperbaric chamber trials reveal high levels of delayed mortality due to barotrauma in mulloway (Argyrosomus japonicus)
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Simulated catch-and-release using experimental hyperbaric chamber trials reveal high levels of delayed mortality due to barotrauma in mulloway (Argyrosomus japonicus)

机译：使用实验性高压室试验模拟捕获和释放揭示了由于毛牛鱼（Argyrosomus japonicus）的Barotrauma造成高水平的延迟死亡率

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摘要

A key factor affecting survival of fish captured from depth and subsequently released is barotrauma - a suite of injuries caused by expanding swim bladder gas and formation of gas embolisms resulting from the decreasing ambient pressure experienced during capture. Mulloway (Argyrosomus japonicus) are an economically-important fishery species in southern Australia often released from deep-water capture suffering from barotrauma. Hyperbaric chambers were therefore used to simulate various catch and release (C&R) scenarios on A. japonicus which allowed the influences of capture depth, surface duration and repressurization on survival and behaviour to be examined in a controlled environment combined with long-term monitoring post-simulation. In Experiment 1, simulated C&R from an acclimation pressure equivalent to 10, 30 or 50 m depth (n = 24 per depth) with a 2 min surface interval resulted in 8% mortality from 10 m increasing to 46 and 50% mortality from 30 and 50 m respectively; mortality delayed by an average of 64 d (range 5-219 d). A second C&R simulation depressurized A. japonicus individuals from either 10 or 30 m - followed by either repressurization after 10 min (Group R), or no repressurization (Group S) (n = 8 for each group). There was 0% mortality from 10 m for both groups, but from 30 m mortality was 100% for Group S and 88% for Group R. All Group S mortality and 38% of Group R mortality was immediate ( 10 min), the remaining 50% of Group R mortality delayed by an average of 21 d. Barotrauma symptoms also increased in severity with increasing depth and surface interval. Immediate mortality was consistent with the formation of gas embolisms in tissues, whereas delayed mortality was likely caused by declining physical condition resulting from loss of buoyancy control caused by gas escape via swim bladder perforation and body wall rupture. Results from these experiments show the potential for delayed mortality in barotrauma-affected A. japonicus to be considerable even when successfully repressurized, casting substantial doubt over the suitability of A. japonicus as a deep-water C&R target species.
机译：影响从深度和随后释放的鱼类存活的关键因素是Barotrauma - 通过扩大游泳膀胱气体和捕获期间经历的环境压力导致的气体栓塞形成引起的一套伤害。 Mluloway（Argyrosomus japonicus）是澳大利亚南部的经济上重要的渔业物种，往往从巴罗拉姆的深水捕获中释放。因此，高压室用于模拟A. japonicus上的各种捕获和释放（C＆R）情景，该方案允许在受控环境中检查的捕获深度，表面持续时间和再加压性的影响以及在受控环境中进行的生存和行为结合长期监测模拟。在实验1中，从等于10,30或50μm的灌注压力（每深度n = 24）的模拟C＆R，2分钟表面间隔导致8％的死亡率从10米增加到46和50％的死亡率分别为50米;死亡率延迟平均64d（范围5-219 d）。第二个C＆R模拟从10或30 m的japonicus个体减压 - 然后在10分钟（r）后的反压缩，或者没有反尿精（群体）（每组n = 8）。对于这两个群体10米的死亡率为0％，但群体的30米的死亡率为100％，r的88％。所有集团的死亡率和38％的r死亡率是立即（<10分钟），剩下50％的r死亡率的平均延迟了21天。巴黎鲁姆症状在严重程度也随着深度和表面间隔的增加而增加。直接死亡率与组织中的气体栓塞的形成一致，而延迟死亡率可能是由于通过游泳膀胱穿孔和身体墙壁破裂而导致的浮力控制损失导致的物理状况下降。这些实验的结果表明，即使在成功反刍的情况下，粳稻的延迟死亡率也具有相当大的，延长了粳稻作为深水C＆R靶样的适用性。

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