Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Multispecies fisheries, particularly those that routinely adapt the timing, location, and methods of fishing to prioritize fishery targets, present a challenge to traditional single-species management approaches. Efforts to develop robust management for multispecies fisheries require an understanding of how priorities drive the network of interactions between catch of different species, especially given the added challenges presented by climate change. Using 35 years of landings data from a southern California recreational fishery, we leveraged empirical dynamic modelling methods to construct causal interaction networks among the main species targeted by the fishery. We found strong evidence for dependencies among species landings time series driven by apparent hierarchical catch preference within the fishery. In addition, by parsing the landings time series into anomalously cool, normal, and anomalously warm regimes (the last reflecting ocean temperatures anticipated by 2040), we found that network complexity was highest during warm periods. Our findings suggest that as ocean temperatures continue to rise, so too will the risk of unintended consequences from single-species management in this multispecies fishery.

中文翻译：

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海表温度对多物种休闲渔业中物种登陆相互作用网络结构和连通性的影响

加拿大渔业和水生科学杂志，印刷前。
多物种渔业，特别是那些经常调整捕捞时间、地点和方法以优先考虑渔业目标的渔业，对传统的单一物种管理方法提出了挑战。为多物种渔业发展稳健管理的努力需要了解优先事项如何推动不同物种捕捞量之间的相互作用网络，特别是考虑到气候变化带来的额外挑战。使用来自南加州休闲渔业的 35 年上岸数据，我们利用经验动态建模方法在渔业所针对的主要物种之间构建因果交互网络。我们发现了强有力的证据表明渔业中明显的等级捕捞偏好驱动的物种上岸时间序列之间的依赖关系。此外，通过将着陆时间序列解析为异常凉爽、正常和异常温暖的状态（预计到 2040 年的最后一次反映海洋温度），我们发现网络复杂性在温暖时期最高。我们的研究结果表明，随着海洋温度的持续上升，这种多物种渔业中单一物种管理产生意外后果的风险也将增加。