Ocean warming and deoxygenation are affecting the physiological performance of marine species by increasing their oxygen demand while reducing oxygen supply. Impacts on organisms (e.g., growth and reproduction) can eventually affect entire populations, altering macroecological dynamics and shifting species’ distribution ranges. To quantify the effect of warming and deoxygenation on marine organisms, Penn et al. (2018) and Deutsch et al. (2020) developed two metabolic indices that integrate physiological, biogeographic and climatic data. Here, we develop an alternative index, referred to as Aerobic Growth Index (AGI) based on an approach that integrates the von Bertalanffy growth and metabolic theory. We compare the results derived from the application of AGI with those of the two previously published metabolic indices for six species: Atlantic blue crab (Callinectes sapidus), sharpsnout seabream (Diplodus puntazzo), Atlantic cod (Gadus morhua), Australian spiny lobster (Panulirus cygnus), red drum (Sciaenops ocellatus) and common cuttlefish (Sepia officinalis). The baseline (1971–2000) habitat suitability values of AGI are significantly and positively correlated with both metabolic indices (R² ≥ 0.92). All three indices also show similar spatial patterns and magnitudes of viable habitat loss by the end of the 21st century (2071–2100) relative to baseline conditions under a high greenhouse gas trajectory (Representative Concentration Pathway 8.5). Our results support the applicability and use of AGI to better understand the impacts of warming and deoxygenation on global marine fishery resources. Given the uncertainties surrounding mechanisms linking temperature, oxygen and biogeography, there is a need for different indicators to account for these uncertainties in climate change projections.

海洋变暖和脱氧通过增加海洋的氧气需求，同时减少氧气供应，正在影响海洋物种的生理性能。对生物的影响（例如生长和繁殖）最终会影响整个种群，改变宏观生态动力学并改变物种的分布范围。为了量化变暖和脱氧对海洋生物的影响，Penn等人。（2018）和Deutsch等。（2020）开发了两个代谢指数，它们整合了生理，生物地理和气候数据。在这里，我们基于整合了冯·贝塔朗菲的生长和代谢理论的方法，开发了一种替代指数，称为有氧生长指数（AGI）。我们将应用AGI得出的结果与先前公布的六个物种的两个代谢指标的结果进行了比较：in（Callinectes sapidus），锋利的鲷鱼（Diplodus puntazzo），大西洋鳕（Gadus morhua），澳大利亚多刺龙虾（Panulirus cygnus），红鼓（Sciaenops ocellatus）和普通墨鱼（Sepia officinalis）。AGI的基线（1971–2000年）栖息地适宜性值与两个代谢指标均显着正相关（R ² ≥0.92）。相对于在高温室气体排放量下的基准条件（代表浓度途径8.5），到21世纪末（2071-2100年），所有这三个指数都显示出相似的空间格局和可行的栖息地丧失程度。我们的结果支持AGI的适用性和使用，以更好地了解变暖和脱氧对全球海洋渔业资源的影响。鉴于围绕温度，氧气和生物地理学的关联机制存在不确定性，因此需要不同的指标来说明气候变化预测中的这些不确定性。