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首页> 外文期刊>ICES Journal of Marine Science >Integrating reflexes with physiological measures to evaluate coastal shark stress response to capture
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Integrating reflexes with physiological measures to evaluate coastal shark stress response to capture

机译：将反射与生理措施相结合，以评估沿海鲨鱼对捕获的压力反应

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In both commercial and recreational fisheries, sharks are captured and released alive to comply with regulations or due to low economic value or voluntary conservation ethic. As a result, understanding the physiological and behavioural responses of sharks to capture stress is important for determining subsequent effects of fisheries interactions on a species-specific basis, as well as for identifying factors that influence mortality. Here, we employed a suite of conventional blood physiology endpoints (glucose, lactate, and haematocrit) integrated with assessments of reflex impairment on blacktip (Carcharhinus limbatus), great hammerhead (Sphyrna mokarran), nurse (Ginglymostoma cirratum) and sandbar sharks (Carcharhinus plumbeus) captured via experimental drumline gear. We documented a wide range of species-specific differences in all parameters assessed, with nurse sharks consistently having the lowest relative levels of physiological disturbance and reflex impairment; and with great hammerheads exhibiting the highest level of physiological disturbance and reflex impairment, suggesting higher vulnerability to fishing. In general, increases in lactate were positively associated with hook time and correlated with reflex impairment assessment. Moreover, reflex indices showed significant impairment with hook time, with the "jaw" reflex emerging as the most potential predictor of disturbance. Our study results connect previously reported species-specific at-vessel and post-release mortality rates to their physiological disturbance and reflex impairment.
机译：在商业和休闲渔业中，鲨鱼都被捕捞并活着放出，以遵守法规或由于经济价值低下或出于自愿的保护伦理。因此，了解鲨鱼捕获压力的生理和行为反应对于确定特定物种间渔业相互作用的后续影响以及确定影响死亡率的因素非常重要。在这里，我们采用了一套常规的血液生理终点指标（葡萄糖，乳酸和血细胞比容），并结合了对黑刺（Carcharhinus limbatus），大锤头（Sphyrna mokarran），护士（Ginglymostoma cirratum）和沙洲鲨（Carcharhinus plumbeus）的反射障碍的评估。 ）通过实验性的鼓线齿轮捕获。我们记录了评估的所有参数中各种物种特异性的差异，而nurse鲨始终具有最低的生理干扰和反射障碍相对水平；大锤头表现出最高水平的生理紊乱和反射损伤，表明对捕鱼的脆弱性更高。通常，乳酸的增加与钩子时间呈正相关，并与反射损伤评估相关。此外，反射指数显示出与钩挂时间有关的显着损害，“下颌”反射成为最可能的干扰预测指标。我们的研究结果将先前报道的物种特异性血管和释放后死亡率与它们的生理紊乱和反射障碍联系起来。

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