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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Habitat partitioning and fine scale population structure among insular bottlenose dolphins (Tursiops aduncus) in a tropical lagoon
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Habitat partitioning and fine scale population structure among insular bottlenose dolphins (Tursiops aduncus) in a tropical lagoon

机译：热带泻湖中岛状宽吻海豚（Tursiops aduncus）的栖息地分配和精细种群结构

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摘要

Among marine organisms, little is known on patterns of intra-species habitat partitioning, whereas many studies have examined niche segregation at the multi-species community level. In this study, we investigated the fine-scale population structure and patterns of within-species habitat use of Indo-Pacific bottlenose dolphins (Tursiops aduncus) in a tropical lagoon of the Indian Ocean (Mayotte, 45°10'E/12°50'S). First, we assessed genetic population structure using mtDNA and 14 microsatellite markers to determine if bottlenose dolphins around Mayotte belong to one or several panmictic groups. The analyses revealed no mitochondrial polymorphism and the presence of a single population at Hardy-Weinberg equilibrium. Second, we assessed whether a community structure exists within the bottlenose population. A community is an assemblage of individuals using a common home range. Photo-identification data were used to assess individual home range size and habitat preferences. Home range analysis revealed the presence of at least two communities of bottlenose dolphins around Mayotte: one occurring in the shallower waters inside the lagoon and a second in the vicinity of a deeper reef bank, situated further offshore in the northern part of the island. Stable isotope analyses of δ~(13)C and δ~(15)N were performed to detect intra-species segregation of habitat and resource use. However, no significant structure across the population was detected. Nevertheless, this study highlights that, even at small spatial scales, individual and between community variations of habitat preferences occur in bottlenose dolphin populations. Intra-species niche partitioning may explain habitat segregation in these insular delphinids.
机译：在海洋生物中，对物种内部栖息地分区模式的了解甚少，而许多研究则在多物种群落水平上研究了生态位隔离。在这项研究中，我们调查了印度洋热带泻湖（马约特岛，东经45°10'E / 12°50'S）中印度洋-太平洋宽吻海豚（Tursiops aduncus）在物种内栖息地的精细规模种群结构和模式）。首先，我们使用mtDNA和14个微卫星标记评估了遗传种群结构，以确定马约特岛附近的宽吻海豚是否属于一个或几个恐慌组。分析显示没有线粒体多态性，并且在Hardy-Weinberg平衡下只有一个种群。其次，我们评估了宽吻种群内是否存在社区结构。社区是使用共同家庭范围的个人的集合。使用照片识别数据来评估各个家庭范围的大小和栖息地偏好。家庭范围分析显示，马约特岛周围至少有两个宽吻海豚群落：一个在泻湖内较浅的水域中发生，另一个在更深的礁石岸附近（位于岛的北部离岸）附近。对δ〜（13）C和δ〜（15）N进行了稳定的同位素分析，以检测物种内部的生境隔离和资源利用。但是，未在整个人群中发现明显的结构。然而，这项研究强调，即使在小空间尺度上，宽吻海豚种群中也会出现栖息地偏好的个体和社区之间的变化。物种内的生态位分配可能解释了这些岛屿飞燕草的生境隔离。

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    Jeremy Kiszka; Benoit Simon-Bouhet; Caroline Gastebois; Claire Pusineri; Vincent Ridoux;

  • 作者单位

    LIENSs (Littoral, Environnement et Sotiites), UMR 6250, CNRS-Universite de La Rochelle, Institut du Littoral et de I'Environnement, 2 rue Olympe de Gouges, F-17000, La Rochelle, France,Direction de I'Environnement et du Devetoppement Durable, Collectivity Dipartementale de Mayotte, BP 101 F-97600 Mamoudzou, Mayotte, France;

    LIENSs (Littoral, Environnement et Sotiites), UMR 6250, CNRS-Universite de La Rochelle, Institut du Littoral et de I'Environnement, 2 rue Olympe de Gouges, F-17000, La Rochelle, France;

    LIENSs (Littoral, Environnement et Sotiites), UMR 6250, CNRS-Universite de La Rochelle, Institut du Littoral et de I'Environnement, 2 rue Olympe de Gouges, F-17000, La Rochelle, France;

    Office National de la Chasse et de la Faune Sauvage, cellule technique Ocian Indien, Mayotte, BP 27, F-97600 Coconi, Mayotte, France;

    LIENSs (Littoral, Environnement et Sotiites), UMR 6250, CNRS-Universite de La Rochelle, Institut du Littoral et de I'Environnement, 2 rue Olympe de Gouges, F-17000, La Rochelle, France;

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  • 正文语种 eng
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  • 关键词

    community formation; home range; indo-pacific bottlenose dolphin; intra-species segregation; population structure; tursiops aduncus;

    机译：群落形成;居所范围;太平洋宽吻海豚;物种内隔离;种群结构;突突类;

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