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首页> 外文期刊>Marine ecology progress series >Communal or competitive? Stable isotope analysis provides evidence of resource partitioning within a communal shark nursery
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Communal or competitive? Stable isotope analysis provides evidence of resource partitioning within a communal shark nursery

机译：共同的还是竞争的？稳定的同位素分析为社区鲨鱼苗圃内的资源分配提供了证据

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摘要

Quantifying the diet of sympatric co-occurring predatory species is a challenging task, made more so when investigations attempt to focus on specific age groups. This is the task that confronts efforts to understand dietary resource partitioning among co-occurring juvenile shark species within nursery areas. Here, stable isotope analysis (δ~(13)C and δ~(15)N) is used to overcome these challenges in describing species dietary resource partitioning strategies within the communal shark nursery area of Cleveland Bay, Queensland, Australia. We analyzed the isotopic composition of 3 distinct tissues, (muscle, blood plasma, and red blood cells), for 7 species of shark and 3 species of large predatory teleost to investigate whether these communal areas support their diverse array of predators without the need for resource partitioning strategies. Clustered δ~(15)N values for all examined species indicated feeding within the same trophic level: however, wide ranging δ~(13)C values denoted exploitation of several primary carbon sources. Our results demonstrate inter-species resource partitioning strategies at work within the examined communal shark nursery, altering the previous interpretation of these areas as resource-rich and/or competition-limited environments.
机译：量化同族共生掠食性动物的饮食是一项艰巨的任务，当调查尝试着眼于特定年龄组时，这一点就显得尤为艰巨。这是努力了解育苗区内同生幼鲨物种之间饮食资源分配的努力所面临的任务。在这里，稳定的同位素分析（δ〜（13）C和δ〜（15）N）被用来克服这些挑战，来描述澳大利亚昆士兰州克利夫兰湾的共同鲨鱼苗圃区内的物种饮食资源分配策略。我们分析了7种鲨鱼和3种大型掠食性硬骨鱼的3种不同组织（肌肉，血浆和红细胞）的同位素组成，以研究这些公共区域是否在不需要捕食者的情况下支持它们多样化的捕食者资源分配策略。所有受检物种的聚集δ〜（15）N值均表明其营养水平相同；然而，较大的δ〜（13）C值范围较大则表明已利用了几种主要碳源。我们的结果表明，在所检查的共同鲨鱼苗圃中，种间资源分配策略在起作用，从而改变了以前对这些地区的解释，即资源丰富和/或竞争受限的环境。

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  • 来源
    《Marine ecology progress series》 |2011年第2011期|p.263-276|共14页
  • 作者

    Michael J. Kinney; Nigel E. Hussey; Aaron T. Fisk; Andrew J. Tobin; Colin A. Simpfendorfer;

  • 作者单位

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

    Great Lakes Institute for Environmental Science, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada;

    Great Lakes Institute for Environmental Science, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada;

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

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

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  • 正文语种 eng
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  • 关键词

    coastal; dietary overlap; muscle; niche partitioning; plasma; red blood cells;

    机译：沿海;饮食重叠;肌肉;生态位分区;等离子体;红细胞;

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