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首页> 外文期刊>ICES Journal of Marine Science >Local recruitment of Atlantic cod and putative source spawning areas in a coastal seascape
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Local recruitment of Atlantic cod and putative source spawning areas in a coastal seascape

机译：在沿海海景中的大西洋鳕鱼和推定源产卵区的本地招聘

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摘要

Increased knowledge on connectivity is crucial to our understanding of the population dynamics, genetic structure, and biogeography of many coastal species. In coastal marine populations, the main factor for structuring is thought to be the degree of isolation and confinement, limiting genetic exchange between populations. However, many offshore populations use the coastal areas as nursery grounds, but venture back to natal spawning grounds as adults. Therefore, increased knowledge on the connectivity between coastal and offshore populations is crucial to ensure correct assessment of coastal living resources. Here, we combine genetic assignment data of Atlantic cod recruits sampled in 2017 and 2018 (as 0- and 1-group cod, respectively) in outer Oslofjord (eastern Skagerrak) with a biophysical model for the Skagerrak region over the time period from spawning to settlement in 2017. We located the most probable spawning locations of Atlantic cod recruits by "back-tracking" larval drift trajectories and found putative source areas on both sides of the outer Oslofjord, as well as potential upstream sources in the North Sea and Kattegat. Findings are discussed with regards to suitable management strategies and potential for restoration of coastal cod populations.
机译：增加了对连接知识对于我们对许多沿海物种的人口动态，遗传结构和生物地理学的理解至关重要。在沿海海洋群体中，结构化的主要因素被认为是孤立和限制的程度，限制人口之间的遗传交流。然而，许多海上人口使用沿海地区作为托儿所地面，但冒险回到当地人作为成年人的产卵场地。因此，提高了对沿海和海上人口之间的连接的知识至关重要，以确保对沿海生活资源的正确评估。在这里，我们将在2017年和2018年（分别为0-和1组COD）中的大型鳕鱼recence的遗传分配数据与Skagerrak地区的生物物理模型一起在外部奥斯勒罗夫杂志（东部Skagerrak）中，从而在产卵到2017年结算。我们通过“背部跟踪”幼虫漂移轨迹以及在外部奥斯洛夫jord两侧找到的推定源区域以及北海和克塔塔特的潜在上游来源，找到了大西洋鳕鱼新招募的最可能产卵。关于适当的管理策略和恢复沿海鳕鱼群的潜力讨论了调查结果。

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