Climate change can hamper sustainable growth in the aquaculture industry by amplifying and adding to other environmental challenges. In Norway, salmon lice-induced mortality in wild salmonid populations is identified as a major risk factor for further expansion. Higher temperatures will induce increased production of salmon lice larvae, decreased developmental time from non-infective nauplii to infectious copepods, and higher infectivity of copepodids. In a warmer climate, a modelling exercise shows how these three factors lead to a significant increase in the infection pressure from farmed to wild salmonids, where the infectivity of copepodids is the term with the highest sensitivity to temperature changes. The total infection pressure gradually increases with increasing temperature, with an estimated twofold if the temperature increases from 9°C to 11°C. Thus, making it even harder to achieve a sustainable expansion of the industry with rising water temperature. This study demonstrates how bio-hydrodynamic models might be used to assess the combined effects of future warmer climate and infection pressure from salmon lice on wild salmonids. The results can be used as an early warning for the fish-farmers, conservation stakeholders and the management authorities, and serve as a tool to test mitigation strategies before implementation of new management plans.

中文翻译：

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气候变暖对挪威水产养殖鲑鱼虱感染压力的影响

气候变化会放大和增加其他环境挑战，从而阻碍水产养殖业的可持续发展。在挪威，野生鲑鱼种群中鲑鱼虱引起的死亡被确定为进一步扩大的主要风险因素。较高的温度将导致鲑鱼虱幼虫的产量增加，从非感染性无节幼体到感染性桡足类的发育时间缩短，以及桡足类的感染性更高。在温暖的气候中，模拟练习显示了这三个因素如何导致从养殖鲑鱼到野生鲑鱼的感染压力显着增加，其中桡足类的感染性是对温度变化最敏感的术语。总感染压力随着温度的升高而逐渐增加，如果温度从 9°C 增加到 11°C，估计会增加两倍。因此，随着水温的升高，更难实现行业的可持续扩张。这项研究展示了如何使用生物流体动力学模型来评估未来气候变暖和鲑鱼虱对野生鲑鱼的感染压力的综合影响。结果可用作养鱼者、保护利益相关者和管理当局的早期预警，并作为在实施新的管理计划之前测试缓解策略的工具。这项研究展示了如何使用生物流体动力学模型来评估未来气候变暖和鲑鱼虱对野生鲑鱼的感染压力的综合影响。结果可用作养鱼者、保护利益相关者和管理当局的早期预警，并作为在实施新的管理计划之前测试缓解策略的工具。这项研究展示了如何使用生物流体动力学模型来评估未来气候变暖和鲑鱼虱对野生鲑鱼的感染压力的综合影响。结果可用作养鱼者、保护利益相关者和管理当局的早期预警，并作为在实施新的管理计划之前测试缓解策略的工具。