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首页> 外文期刊>Marine biology >Fine-scale genetic structure in Lahille's bottlenose dolphins (Tursiops truncatus gephyreus) is associated with social structure and feeding ecology
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Fine-scale genetic structure in Lahille's bottlenose dolphins (Tursiops truncatus gephyreus) is associated with social structure and feeding ecology

机译：拉希尔的宽吻海豚（Tursiops truncatus gephyreus）的精细遗传结构与社会结构和饲养生态相关

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Varying levels of population structure may arise from interactions between intrinsic behavioral and demographic factors and extrinsic environmental factors. Social organization, habitat use, resource partitioning, or even individual preferences are putative drivers of population genetic differentiation over fine spatial scales. Here, genome-wide data from single-nucleotide polymorphisms (SNPs) and carbon and nitrogen stable isotope data were used to examine population structure and niche partitioning among three social units of bottlenose dolphins with strong home range overlap in a relatively small geographic area in southern Brazil. Results from model-based and model-free analyses of population structure supported the delineation of two populations, one with preferences for estuarine waters and another strictly coastal, consistent with isotopic niche differentiation. These findings suggest that genetic and ecological structuring is mainly driven by habitat use. At finer scale, we also detected low but significant genetic differentiation among the three social units. The outcomes of this study provide new insights into population structure of Lahille's bottlenose dolphins in the Patos Lagoon estuary and its adjacent coastal waters, which are exposed to increasing levels of anthropogenic disturbances, such as intensive artisanal fisheries, pollution, and boat traffic. Although for demographic studies, the estuary and the coastal dolphins should be treated separately, for conservation purposes, we recommend that the three social units be regarded as different entities.
机译：人口结构的不同水平可能源于内在行为和人口统计学因素与外在环境因素之间的相互作用。社会组织，栖息地的使用，资源的划分，甚至个人的偏好，都是在精细空间尺度上人口遗传分化的推定驱动力。在这里，来自单核苷酸多态性（SNP）的全基因组数据以及碳和氮稳定同位素数据被用于检查南部相对较小地理区域的宽吻海豚三个社会单位中具有强烈家域重叠的种群结构和生态位分配。巴西。基于模型和无模型的人口结构分析结果支持了两个种群的划分，一个种群偏爱河口水域，另一个严格沿岸种群，这与同位素生态位分化相一致。这些发现表明，遗传和生态结构主要是由栖息地利用驱动的。在更精细的规模上，我们还检测到三个社会单位之间的遗传分化较低，但很明显。这项研究的结果为Patos泻湖河口及其邻近沿海水域中Lahille的宽吻海豚的种群结构提供了新的见识，后者面临着越来越多的人为干扰，例如密集的手工渔业，污染和船只运输。尽管对于人口统计学研究，应将河口和沿海海豚分开对待，但出于保护目的，我们建议将这三个社会单位视为不同的实体。

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    《Marine biology》 |2020年第3期|34.1-34.16|共16页
  • 作者

    Genoves Rodrigo Cezar; Fruet Pedro F.; Botta Silvina; Beheregaray Luciano B.; Moeller Luciana M.; Secch Eduardo R.;

  • 作者单位

    Univ Fed Rio Grande FURG Museu Oceanog Prof Eliezer de C Rios Rio Grande RS Brazil|Univ Fed Rio Grande FURG Lab Ecol & Conservacao Megafauna Marinha EcoMega Inst Oceanog Rio Grande RS Brazil|Univ Fed Rio Grande FURG Programa Posgrad Oceanog Biol Rio Grande RS Brazil|Kaosa Rio Grande RS Brazil|Flinders Univ S Australia Cetacean Ecol Behav & Evolut Lab Adelaide SA Australia|Flinders Univ S Australia Mol Ecol Lab Adelaide SA Australia;

    Univ Fed Rio Grande FURG Museu Oceanog Prof Eliezer de C Rios Rio Grande RS Brazil|Univ Fed Rio Grande FURG Lab Ecol & Conservacao Megafauna Marinha EcoMega Inst Oceanog Rio Grande RS Brazil|Kaosa Rio Grande RS Brazil|ICMBio MMA Ctr Nacl Pesquisa & Conservacao Mamiferos Aquat C Santos SP Brazil;

    Univ Fed Rio Grande FURG Lab Ecol & Conservacao Megafauna Marinha EcoMega Inst Oceanog Rio Grande RS Brazil|Univ Fed Rio Grande FURG Programa Posgrad Oceanog Biol Rio Grande RS Brazil;

    Flinders Univ S Australia Mol Ecol Lab Adelaide SA Australia;

    Flinders Univ S Australia Cetacean Ecol Behav & Evolut Lab Adelaide SA Australia|Flinders Univ S Australia Mol Ecol Lab Adelaide SA Australia;

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