The maximum intrinsic rate of population increase (r_max) represents a population's maximum capacity to replace itself and is central to fisheries management and conservation. Species with lower r_max typically have slower life histories compared to species with faster life histories and higher r_max. Here, we posit that metabolic rate is related to the fast–slow life history continuum and the connection may be stronger for maximum metabolic rate and aerobic scope compared to resting metabolic rate. Specifically, we ask whether variation in r_max or any of its component life-history traits – age-at-maturity, maximum age, and annual reproductive output – explain variation in resting and maximum metabolic rates and aerobic scope across 84 shark and teleost species, while accounting for the effects of measurement temperature, measurement body mass, ecological lifestyle, and evolutionary history. Overall, we find a strong connection between metabolic rate and the fast-slow life history continuum, such that species with faster population growth (higher r_max) generally have higher maximum metabolic rates and broader aerobic scopes. Specifically, r_max is more important in explaining variation in maximum metabolic rate and aerobic scope compared to resting metabolic rate, which is best explained by age-at-maturity (out of the life history traits examined). In conclusion, teleosts and sharks share a common fast–slow physiology/life history continuum, with teleosts generally at the faster end and sharks at the slower end, yet with considerable overlap. Our work improves our understanding of the diversity of fish life histories and may ultimately improve our understanding of intrinsic sensitivity to overfishing.

中文翻译：

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海洋鱼类的新陈代谢、种群增长和快慢生命史连续体

人口最大内在增长率（r _max）代表人口自我更新的最大能力，对于渔业管理和保护至关重要。与具有较快生命史和较高r _{max 的物种相比，具有较低}r _max的物种通常具有较慢的生命史。在这里，我们假设代谢率与快慢生命史连续体相关，并且与静息代谢率相比，最大代谢率和有氧范围的联系可能更强。具体来说，我们询问r _max或其任何组成生命史特征（成熟年龄、最大年龄和年繁殖产量）的变化是否可以解释 84 种鲨鱼和硬骨鱼物种的静息和最大代谢率以及有氧范围的变化，同时考虑测量温度、测量体重、生态生活方式和进化历史的影响。总体而言，我们发现代谢率与快-慢生命史连续体之间存在密切联系，因此种群增长较快（r _max较高）的物种通常具有较高的最大代谢率和更广泛的需氧范围。具体来说，与静息代谢率相比， r _max在解释最大代谢率和有氧范围的变化方面更重要，这最好通过成熟年龄（在所检查的生活史特征之外）来解释。总之，硬骨鱼和鲨鱼具有共同的快慢生理/生活史连续体，硬骨鱼通常处于较快的一端，鲨鱼处于较慢的一端，但有相当大的重叠。我们的工作提高了我们对鱼类生活史多样性的理解，并可能最终提高我们对过度捕捞的内在敏感性的理解。