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首页> 外文期刊>Marine biology >To roam or to home: site fidelity in a tropical coastal shark
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To roam or to home: site fidelity in a tropical coastal shark

机译：漫游或回家：在热带沿海鲨鱼中保真度

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摘要

Understanding patterns in site fidelity is important for defining the ecological role of species in the systems they use and for gauging the effects of human impacts on their populations. We analyzed long-term movement data of adult spottail sharks (Carcharhinus sorrah) in Cleveland Bay, Australia, to define the degree of site fidelity this species shows to coastal areas. Individuals were monitored in the study site for 28-566 days, and residency index (i.e., proportion of days present to total monitoring period) ranged from 0.08 to 0.95. Using a randomization procedure, we determined that the movement paths for 90 % of individuals (11 female and 7 male) were more constrained than random, with individuals exhibiting a high degree of site fidelity to consistent areas within the study site. Examining distances moved revealed that individuals used the same areas repeatedly and remained in close proximity (i.e., <6 km) to their location of first detection. While some individuals consistently used and returned back to the same locations, low residency among others suggests that a portion of the population may roam more widely. Long-term site fidelity to consistent areas may be a successful behavioral strategy for C. sorrah by increasing individual fitness through spatial familiarity and knowledge of resources.
机译：了解场所保真度的模式对于定义物种在其使用的系统中的生态作用以及衡量人类对其种群的影响至关重要。我们分析了澳大利亚克利夫兰湾的成年斑尾鲨（Carcharhinus sorrah）的长期运动数据，以确定该物种对沿海地区显示的保真度。在研究地点对个体进行了28-566天的监控，其居住指数（即在总监控天数中所占天数的比例）为0.08至0.95。使用随机化程序，我们确定90％的个体（11名女性和7名男性）的移动路径比随机性更受限制，其中个体对研究区域内的一致区域表现出高度的站点保真度。检查距离后发现，人们反复使用相同的区域，并且与他们的首次发现位置保持紧密距离（即<6 km）。虽然有些人一直使用并返回到相同的地点，但是居住地低的人表明一部分人口可能会更广泛地漫游。通过提高空间适应性和对资源的了解来提高个体适应度，长期对场地一致的地点保真度可能是C. sorrah的成功行为策略。

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  • 来源
    《Marine biology》 |2012年第8期|p.1647-1657|共11页
  • 作者

    Danielle M. Knip; Michelle R. Heupel; Colin A. Simpfendorfer;

  • 作者单位

    Fishing and Fisheries Research Centre, School of Earth and Environmental Sciences, James Cook University, Townsville, QLD 4811, Australia,Sea Around Us Project, Fisheries Centre, The University of British Columbia, 2202 Main Mall, Vancouver, British Columbia V6T 1Z4, Canada;

    Australian Institute of Marine Science and James Cook University, Townsville, QLD 4811, Australia;

    Fishing and Fisheries Research Centre, School of Earth and Environmental Sciences, James Cook University, Townsville, QLD 4811, Australia;

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