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首页> 外文期刊>Marine ecology progress series >Partial migration of striped bass: revisiting the contingent hypothesis
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Partial migration of striped bass: revisiting the contingent hypothesis

机译：条纹鲈鱼的部分迁移：重新审视或然假设

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Partial migration, by which contingents within populations undertake divergent migrations, is common in marine fishes but remains poorly documented. Intrapopulation groups of fish with similar seasonal migration behaviors were noted early in the fisheries literature and have attracted increased interest for their role in population resilience to environmental change and fishing. Here, we used acoustic telemetry to test historical hypotheses on contingent structure for striped bass Morone saxatilis in the Hudson River, New York (USA), which harbors one of the largest populations of this species. Season and region of release were used as design elements to evaluate 3 principal contingents. In total, 51 implanted striped bass were detected in New York Harbor (NYH), Hudson River, and other estuarine and coastal receiver arrays from June 2010 through December 2011. Multivariate analyses of >500 000 recoveries confirmed predictions of 3 broad contingent behaviors, viz. those that principally utilized (1) the Upper Hudson River Estuary, (2) the NYH and Lower Hudson River Estuary, and (3) coastal waters, but commingled in upper Hudson River spawning habitats during late spring. All contingents occupied NYH, but their transit routes into and out of the harbor varied significantly. Further behavioral diversity was observed within contingents, including size-specific differential migration, multiple natal origins (natal divergence), and non-annual (skipped) spawning. Contingent structure within Hudson River striped bass likely distributes the influences of regional fisheries, pollution, and other en vironmental forces, promoting stability and persistence in the overall population.
机译：部分迁移由种群内的特遣队进行不同的迁移，这种迁移在海水鱼类中很常见，但文献记载仍然很少。早期在渔业文献中注意到具有相似季节性迁徙行为的鱼类种群内种群，并因其在种群对环境变化和捕鱼的适应力中的作用而引起了越来越多的兴趣。在这里，我们使用声学遥测技术测试了纽约哈德逊河（美国）中斑纹鲈鲈Morone saxatilis的可能结构的历史假设，该种群是该物种中最大的种群之一。使用释放的季节和区域作为设计要素来评估3个主要特遣队。从2010年6月到2011年12月，在纽约港（NYH），哈德逊河以及其他河口和沿海接收器阵列中总共检测到51种条纹鲈鱼。对> 500 000回收率的多变量分析证实了3种或有行为的预测，即。主要利用（1）上哈德逊河河口，（2）NYH和下哈德逊河河口以及（3）沿海水域，但又混入了哈德逊河上流产卵栖息地于春季末。所有特遣队都占领了纽约州，但进出港口的过境路线差异很大。在特遣队中还观察到了更多的行为多样性，包括特定大小的差异迁徙，多个出生地（出生发散）和非年度（跳过）产卵。哈德逊河条纹鲈鱼内的特有结构可能会分布区域渔业，污染和其他环境力量的影响，从而促进总体人口的稳定和持久性。

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