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首页> 外文期刊>Fisheries Research >Experimental hyperbaric chamber trials reveal high resilience to barotrauma in Australian snapper (Chrysophrys auratus)
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Experimental hyperbaric chamber trials reveal high resilience to barotrauma in Australian snapper (Chrysophrys auratus)

机译：实验性高压室试验显示澳大利亚鲷鱼（Chrysophrys Auratus）的巴蒂拉姆纳高恢复力

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摘要

A key factor affecting survival of fish which are captured at depth and subsequently released is barotrauma. Barotrauma are a suite of injuries which occur as a result of the decreasing ambient pressure experienced by a fish during capture and are caused by expanding swim bladder gas and formation of gas embolisms. Snapper (Chrysopluys auratus) are of key importance to both commercial and recreational fisheries in southern Australia and are often released after capture suffering from barotrauma. Previous research has yielded inconsistent results for survival of C. awaits after suffering barotrauma, in part due to influences related to capture, 'cage' effects and the use of only very short term post-catch and release monitoring. This study therefore used laboratory hyperbaric chambers to simulate the pressure changes associated with capture to investigate whether barotrauma was a direct cause of mortality in C. auratus. The influences of depth and repressurization on mortality, behaviour and symptoms due to barotrauma could therefore be examined in a controlled environment independent of capture and 'cage' effects combined with long-term monitoring (220 d) post-simulation. In a pilot experiment C. auratus (n = 12) were depressurized from 8 bar ( approximate to 70 m depth), before being repressurized after 2 min at 1 bar (atmospheric pressure) resulting in agitated in-chamber behaviours and abdominal distension as a result of swim bladder perforation, but 100% survival. A second experiment depressurized C. auratus from 4 bar ( approximate to 30 m depth); one treatment group (n = 32) were repressurized after 10 min again resulting in behaviour and symptoms indicative of swim bladder perforation and 100% survival, the other group (n = 32) was left at 1 bar and exhibited many additional external and internal barotrauma symptoms and suffered 16% mortality. Despite the death of a single control individual, statistical analyses found a significant effect of treatment on mortality. Mortality occurred within 15 min of depressurization and the cause of death was consistent with the formation of gas embolisms. Staged post-mortems performed on C. currants that had been depressurized from 4 bar to induce swim bladder perforation indicated that swim bladders were healed sufficiently to hold gas after just 2 d. C. auratus were shown to be a remarkably robust species to the effects of barotrauma, particularly if repressurized quickly ( & 10 min) after capture and this resilience is likely reflective of their characteristic semi-pelagic physiology. This study also demonstrated the usefulness of laboratory hyperbaric chambers to examine the long term (& 200 d) effects of depressurization on deep water fish species independent of capture and 'cage' effects.
机译：影响深度和随后释放的鱼类存活的关键因素是巴罗拉姆。巴黎鲁姆是一套伤害，由于捕获期间鱼类的环境压力降低，并且是通过扩大游泳膀胱气体和瓦斯栓塞的形成引起的。 Snapper（Chrysopluys Auratus）对澳大利亚南部的商业和休闲渔业有重视，并且经常在遭受巴罗拉姆的痛苦后释放。以前的研究在患有Barotrauma患有Barotrauma后，C的生存结果产生了不一致的结果，部分原因是由于与捕获，'笼子的效果和仅限于捕获后和释放监测的使用的影响。因此，该研究使用了实验室高压室来模拟与捕获相关的压力变化，以研究Barotrauma是否是C. auratus中的死亡率的直接原因。因此，在受控环境中，可以在独立于捕获和'笼子'效果的受控环境中检查深度和压制化对死亡率，行为和症状引起的死亡率，行为和症状的影响与长期监测（220 d）进行模拟后。在试验实验中，Auratus（n = 12）从8巴（近似至70米深度）减压，然后在1巴（大气压）后2分钟后压制化，导致室内行为搅拌和腹部差游泳膀胱穿孔的结果，但存活100％。第二种实验从4巴（近30米深度）减压C. auratus;在10分钟后再次阻遏一次治疗组（n = 32）导致表明游泳膀胱穿孔和100％存活的行为和症状，另一组（n = 32）留在1巴，并展出了许多额外的外部和内部巴拉姆纳症状和16％的死亡率。尽管单一控制的人死亡，但统计分析发现了对死亡率进行的显着影响。死亡率在减压15分钟内发生，死亡原因与瓦斯栓塞的形成一致。在C的验尸中表演的验浆体从4巴诱导游泳膀胱穿孔的浆果上进行了减少的浆果表明，游泳衣在仅2天之后，游泳膀胱愈合以保持气体。 C.αuratus被证明是一种非常强大的物种，特别是Barotrauma的影响，特别是如果在捕获后迅速重压（＆amp; 10分钟），并且这种弹性可能反映其特征半胸腺生理学。本研究还证明了实验室高压室的有用性，以检查长期（＆amp; 200 d）减压对深水鱼类的影响，与捕获和'笼子'效果无关。

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