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首页> 外文期刊>Marine biology >Fine-scale population structure of common bottlenose dolphins (Tursiops truncatus) in offshore and coastal waters of the US Gulf of Mexico
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Fine-scale population structure of common bottlenose dolphins (Tursiops truncatus) in offshore and coastal waters of the US Gulf of Mexico

机译：美国墨西哥湾近海和沿海水域的宽吻海豚（Tursiops truncatus）的小规模种群结构

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摘要

Patterns of dispersal and population structure of highly mobile marine fauna in the open ocean are not well understood. Much insight, however, can be gained from using common bottlenose dolphins (Tursiops truncatus), one of the most abundant marine mammals in the northern Gulf of Mexico (GOMx), as a model to better understand these aspects of the marine realm. Populations of common bottlenose dolphins in estuarine environments show evidence of strong population structure; however, whether this species similarly partitions the open ocean to the point that genetically differentiated populations are present is unknown. Such information is essential to accurately assess natural and anthropogenic impacts and is crucial for effective conservation and management. We used mitochondrial DNA control region sequence data, 19 microsatellite and 39 single nucleotide polymorphism loci to identify population structure of T. truncatus in coastal and offshore waters of the northern GOMx. Bayesian clustering and a multivariate method of discriminant analysis identified seven genetically distinct populations and levels of genetic differentiation were in line with other recognized populations of T. truncatus. The newly identified populations do not correspond to the currently delineated management stocks, suggesting revision may be necessary to establish accurate representation and effective management of the existing biological populations of T. truncatus in these waters. The finding of significant population structure in dolphins living in open-ocean waters augments the growing body of evidence indicating pelagic waters are not homogeneous even for highly mobile species.
机译：在公海中，高度活动的海洋动物群的扩散和种群结构的模式尚未得到很好的理解。但是，使用普通的宽吻海豚（Tursiops truncatus）（可以作为墨西哥北部北部最丰富的海洋哺乳动物之一）作为模型来更好地了解海洋领域的各个方面，可以得到很多见识。在河口环境中，普通宽吻海豚的种群显示出强大的种群结构。然而，该物种是否同样将海洋分隔成具有遗传分化种群的点尚不清楚。这些信息对于准确评估自然和人为影响至关重要，对于有效的保护和管理至关重要。我们使用线粒体DNA控制区序列数据，19个微卫星和39个单核苷酸多态性基因座来识别在北部GOMx沿海和近海水域的run藜种群结构。贝叶斯聚类和判别分析的多变量方法确定了七个遗传上不同的种群，遗传分化水平与其他公认的t藜种群相同。新发现的种群与目前划定的管理种群不符，建议对这些水域中的t藜现有生物种群建立准确的代表性和有效管理的必要修订。在开放海域生活的海豚中发现重要的种群结构，这增加了越来越多的证据表明，即使对于高度活动的物种，远洋水域也不均匀。

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    《Marine biology》 |2017年第8期|160.1-160.15|共15页
  • 作者

    Vollmer Nicole L.; Rosel Patricia E.;

  • 作者单位

    Univ Louisiana Lafayette, Dept Biol, POB 42451, Lafayette, LA 70504 USA|NOAA, Natl Marine Fisheries Serv, Southeast Fisheries Sci Ctr, 646 Cajundome Blvd, Lafayette, LA 70506 USA|NOAA, Natl Marine Fisheries Serv, Natl Systemat Lab, Natl Museum Nat Hist,Smithsonian Inst, MRC 153,POB 37012, Washington, DC 20013 USA;

    NOAA, Natl Marine Fisheries Serv, Southeast Fisheries Sci Ctr, 646 Cajundome Blvd, Lafayette, LA 70506 USA;

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