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首页> 外文期刊>Marine biology >Fine-scale population structure of estuarine bottlenose dolphins (Tursiops truncatus) assessed using stable isotope ratios and fatty acid signature analyses
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Fine-scale population structure of estuarine bottlenose dolphins (Tursiops truncatus) assessed using stable isotope ratios and fatty acid signature analyses

机译：使用稳定的同位素比率和脂肪酸特征分析评估河口宽吻海豚（Tursiops truncatus）的小规模种群结构

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摘要

Stable isotope ratios and fatty acid signature analyses were employed to examine the fine-scale population structure of a year-round resident population of 600-800 bottlenose dolphins {Tursiops truncatus) in the Indian River Lagoon (IRL), Florida. The IRL, a 250-km-long estuary running along the central east coast of Florida (28.0°N, 80.6°W), is comprised of the northern and southern IRL, Mosquito Lagoon (ML), Banana River (BR), and St. Lucie Estuary. Samples of skin and blubber were collected from dead stranded (n = 61, 1994-2004) and live dolphins (n = 153, 2002-2007, 2010, 2011) from throughout the IRL and surrounding environs. Using stable isotopes (SI), dolphins could be assigned to a ML subpopulation, a St. Lucie Estuary subpopulation, and an IRL subpopulation. Fatty acid signature analysis (FASA) allowed for finer resolution, detecting ML and BR subpopulations, a separation of northern and southern IRL subpopulations, and a St. Lucie Estuary subpopulation. Differences between sexes were detectable within subpopulations using FASA, but not using SI. This may indicate that males and females are foraging in similar locations at a similar trophic level (detected using SI), but are varying in the types or proportions of specific prey (indicated by FASA). The combination of these complementary analyses results in a powerful tool for assessing fine-scale population substructure.
机译：稳定的同位素比率和脂肪酸特征分析用于检查佛罗里达州印第安河泻湖（IRL）的600-800瓶宽吻海豚（Tursiops truncatus）的常年常住人口的精细规模种群结构。 IRL是一条长250公里的河口，沿佛罗里达中部东海岸（北纬28.0°，北纬80.6°）延伸，由北和南IRL，蚊子泻湖（ML），香蕉河（BR）和圣露西河口。从整个IRL和周围地区的死链（n = 61，1994-2004）和活海豚（n = 153，2002-2007，2010，2011）中收集皮肤和油脂样本。使用稳定同位素（SI），可以将海豚分配给ML亚群，St。Lucie河口亚群和IRL亚群。脂肪酸特征分析（FASA）可实现更高分辨率，检测ML和BR亚群，分离IRL北部和南部IRL亚群以及St. Lucie河口亚群。在使用FASA的亚人群中可检测到性别差异，但使用SI则无法检测。这可能表明雄性和雌性正在相似的营养水平上在相似的位置觅食（使用SI检测），但是特定猎物的类型或比例有所不同（由FASA指示）。这些互补分析的结合产生了一个用于评估小规模人口子结构的强大工具。

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    《Marine biology》 |2014年第6期|1307-1317|共11页
  • 作者

    N. E. Browning; S. D. McCulloch; G. D. Bossart; G. A. J. Worthy;

  • 作者单位

    Physiological Ecology and Bioenergetics Lab, Department of Biology, University of Central Florida, Orlando, FL 32816, USA;

    Marine Mammal Research and Conservation Program, Center for Marine Ecosystems Health, Harbor Branch Oceanographic Institute at Florida Atlantic University, Fort Pierce, FL 34946, USA;

    Georgia Aquarium, Atlanta, GA 30313, USA;

    Physiological Ecology and Bioenergetics Lab, Department of Biology, University of Central Florida, Orlando, FL 32816, USA,Hubbs-SeaWorld Research Institute, San Diego, CA 92109, USA;

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