Empirical evaluations of how overexploited marine fishes respond to capture stress (physiologically and behaviourally) have become increasingly important for informed fisheries management. These types of studies are, however, lacking for many protected species. Here, we conducted a novel study on the physiology of juvenile white sharks Carcharodon carcharias (139−325 cm fork length), a globally protected and ecologically important predator, in response to a standard fishery interaction using shark-management-alert-in-real-time (SMART) drumlines as part of a bather protection program. Specifically, we assessed the influence of short-term capture duration (average: ~30 min; range: 10−75 min) and other biological (size) and environmental (temperature) variables on blood plasma amino acids and fatty acids, which play essential roles as energy substrates as well as in maintaining physiological functions. None of the assessed amino acids or fatty acids were affected by capture duration, but some were influenced by shark size and water temperature. Our results support the notion that white shark physiology is robust to capture at short capture durations, which has important implications for the fate of released individuals.

中文翻译：

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短期捕获对白鲨生理机能的影响 Carcharodon carcharias：氨基酸和脂肪酸

对过度捕捞的海洋鱼类如何应对捕捞压力（生理和行为）的实证评估对于知情渔业管理变得越来越重要。然而，许多受保护物种缺乏这些类型的研究。在这里，我们对幼年白鲨 Carcharodon carcharias（叉长 139-325 厘米）的生理学进行了一项新研究，这是一种受全球保护且具有生态重要性的捕食者，以响应使用鲨鱼管理现实警报的标准渔业相互作用-time (SMART) 鼓声作为沐浴者保护计划的一部分。具体而言，我们评估了短期捕获持续时间（平均：~30 分钟；范围：10-75 分钟）和其他生物（大小）和环境（温度）变量对血浆氨基酸和脂肪酸的影响，它们作为能量底物以及维持生理功能发挥着重要作用。评估的氨基酸或脂肪酸均不受捕获持续时间的影响，但有些受鲨鱼大小和水温的影响。我们的结果支持这样一种观点，即白鲨生理机能在较短的捕获时间内捕获是稳健的，这对被释放个体的命运具有重要意义。