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首页> 外文期刊>Marine biology >Food resource partitioning in a Mediterranean demersal fish assemblage: the effect of body size and niche width
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Food resource partitioning in a Mediterranean demersal fish assemblage: the effect of body size and niche width

机译：地中海深水鱼类组合中的食物资源分配：体型和生态位宽度的影响

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摘要

We investigated the effects of body size, feeding strategy and depth distribution on the trophic resource partitioning among the 26 dominant fish consumers in a fish assemblage on the central Mediterranean shelf-break. The fish assemblage was structured in two major trophic guilds: epibenthic and zooplanktonic feeders, according to the position of each predator along the benthos-plankton gradient. Within each main guild, the species were segregated along a prey-size or fish-size gradient into five further guilds. Fish size and prey size were strongly correlated, indicating that the prey-size niche can be well explained by predator size. Fish consumers showed a significant negative correlation between the similarity in prey type and the similarity in depth distribution; most species with similar trophic preferences segregated along the depth dimension. The only predators overlapping in both food and depth preferences were those with a more specialist trophic behavior. These results suggest that fish body size and depth preferences are the two main niche dimensions, explaining a large part of the coexistence between the Mediterranean shelf-break fish consumers.
机译：我们调查了地中海中部陆架断裂带鱼类组合中26个主要鱼类消费者中体重，饲喂策略和深度分布对营养资源分配的影响。根据每个捕食者沿底栖生物-浮游生物梯度的位置，将鱼群分为两个主要的营养行会：表皮和浮游动物。在每个主要行会中，该物种沿着猎物大小或鱼类大小的梯度分为五个另外的行会。鱼的大小和猎物的大小密切相关，表明猎物大小的生态位可以很好地解释为捕食者的大小。鱼类消费者的猎物类型相似度与深度分布相似度之间存在显着的负相关。多数具有相似营养偏好的物种沿深度方向分离。唯一在食物和深度偏好上都重叠的捕食者是那些具有更专业的营养行为的食肉动物。这些结果表明，鱼的体型和深度偏爱是两个主要的利基维度，这说明了地中海货架期鱼类消费者之间并存的很大一部分。

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  • 来源
    《Marine biology》 |2010年第3期|565-574|共10页
  • 作者

    Francesco Colloca; Paolo Carpentieri; Elena Balestri; Giandomenico Ardizzone;

  • 作者单位

    Department of Animal and Human Biology, University of Rome 'La Sapienza', V.le dell'Universita, 32,00185 Rome, Italy;

    rnDepartment of Animal and Human Biology, University of Rome 'La Sapienza', V.le dell'Universita, 32,00185 Rome, Italy;

    rnDepartment of Animal and Human Biology, University of Rome 'La Sapienza', V.le dell'Universita, 32,00185 Rome, Italy;

    rnDepartment of Animal and Human Biology, University of Rome 'La Sapienza', V.le dell'Universita, 32,00185 Rome, Italy;

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