ObjectiveWe investigate the interacting effects of fishery selectivity and sexual dimorphism by using the fisheries for Southern Flounder Paralichthys lethostigma and Summer Flounder P. dentatus as case studies. In both species, females are larger than males, and temperature‐sensitive sex determination can lead to an increased proportion of males at sexual differentiation in warmer temperatures.MethodsWe developed a size‐, age‐, and sex‐structured population dynamics model for each species to understand how temperature‐induced sex reversal will interact with harvesting to impact population productivity. We considered scenarios with realistic sex ratios and varying levels of fishing pressure.ResultOur models of these species show that population egg production, abundance, biomass, and catch will all be constrained if sex ratios at differentiation become more male‐biased. For both species, climate‐induced changes to the sex ratio in early‐life stages could have a greater impact on relative catch than fishing mortality. We demonstrate that the spawning potential ratio may not be sensitive to climate‐induced changes in the sex ratio unless we account for changes in the sex ratio at differentiation in the historic baseline reproductive potential.ConclusionThese findings underscore the importance of utilizing sex‐specific stock assessments for species with temperature‐sensitive sex determination mechanisms.

中文翻译：

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模拟气候驱动的性别逆转对南方和夏鲽种群动态的潜在影响

目的以南方牙鲆渔业为研究对象，探讨渔业选择性与性二态性的交互作用。黑牙牙鲆和夏季比目鱼齿斑蝽作为案例研究。在这两个物种中，雌性都比雄性大，温度敏感的性别决定可能导致在温暖的温度下进行性别分化的雄性比例增加。方法我们为每个物种开发了一个体型、年龄和性别结构的种群动态模型了解温度引起的性逆转如何与收获相互作用，从而影响人口生产力。我们考虑了现实性别比例和不同捕捞压力水平的情景。结果我们对这些物种的模型表明，如果分化时的性别比例变得更加偏向雄性，那么种群产蛋量、丰度、生物量和捕获量都将受到限制。对于这两个物种来说，生命早期阶段气候引起的性别比例变化对相对捕获量的影响可能比对捕捞死亡率的影响更大。我们证明，产卵潜力比率可能对气候引起的性别比率变化不敏感，除非我们考虑历史基线繁殖潜力分化时性别比率的变化。结论这些发现强调了利用特定性别种群评估的重要性对于具有温度敏感性别决定机制的物种。