Fisheries bycatch risk to marine megafauna is intensified in Lagrangian coherent structures
Fisheries bycatch risk to marine megafauna is intensified in Lagrangian coherent structures
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DOI：
10.1073/pnas.1801270115
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发表时间：
2018-07-10
影响因子：
11.1
通讯作者：
Bograd, Steven J.
中科院分区：
文献类型：
--
作者：
Scales, Kylie L.;Hazen, Elliott L.;Bograd, Steven J.
在海洋捕捞渔业中，非目标鱼种的附带捕获（兼捕）是生态和经济可持续性的主要障碍。减少兼捕的关键是了解目标和非目标鱼种的生境要求以及动态海洋环境的异质性和可变性的影响。虽然已经报告了海洋捕捞渔业和分类上多种多样的海洋脊椎动物栖息地之间的重叠模式，但对混捕事件的实时物理驱动因素缺乏机械理解。从描述模式转向理解过程，我们将拉格朗日分析应用于高分辨率海洋模型输出，以阐明驱动渔业相互作用的基本机制。我们发现，海洋巨型动物的副渔获物的可能性加强吸引拉格朗日相干结构与中尺度和中尺度细丝，锋，涡。这些结果突出了海洋动态结构的实时跟踪如何支持渔业可持续性和推进基于生态系统的管理。
Incidental catch of nontarget species (bycatch) is a major barrier to ecological and economic sustainability in marine capture fisheries. Key to mitigating bycatch is an understanding of the habitat requirements of target and nontarget species and the influence of heterogeneity and variability in the dynamic marine environment. While patterns of overlap among marine capture fisheries and habitats of a taxonomically diverse range of marine vertebrates have been reported, a mechanistic understanding of the real-time physical drivers of bycatch events is lacking. Moving from describing patterns toward understanding processes, we apply a Lagrangian analysis to a high-resolution ocean model output to elucidate the fundamental mechanisms that drive fisheries interactions. We find that the likelihood of marine megafauna bycatch is intensified in attracting Lagrangian coherent structures associated with submesoscale and mesoscale filaments, fronts, and eddies. These results highlight how the real-time tracking of dynamic structures in the oceans can support fisheries sustainability and advance ecosystem-based management.