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首页> 外文OA文献 >Role of food availability in the bathymetric distribution of the starfish 'Marthasterias glacialis' (Lamk.) on reefs of northern Portugal
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Role of food availability in the bathymetric distribution of the starfish 'Marthasterias glacialis' (Lamk.) on reefs of northern Portugal

机译：食物供应量在葡萄牙北部珊瑚礁上的海星“ Marthasterias glacialis”（Lamk。）的等深线分布中的作用

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[EN] We examined whether the abundance and size of the starfish Marthasterias glacialis (Lamk.) exhibit a depth-dependent partitioning on subtidal reefs. We tested the hypothesis that differences in food availability can result in habitat partitioning along a depth gradient. The abundance and size of M. glacialis was registered at 4 depth strata: 0-4 m, 4-8 m, 8-12 m, and >12 m; we also recorded the number of food items that they were preying on. The abundance and size of M. glacialis decreased with depth. Mussels (Mytilus galloprivincialis) were the most preyed food item across all depth strata, followed by gastropods, sea urchins and barnacles; M. glacialis also consumed a significantly larger amount of mussels in feeding experiments compared with sea urchins and gastropods. The abundance of M. galloprivincialis beds decreased with depth. The clear link between the decrease in abundance and size of M. glacialis with depth and the decay of the most consumed prey (mussels) suggest that food availability may play an important role in the vertical distribution of this starfish, though wave-associated turbulence in the first few metres of the subtidal could also limit the abundance of M. glacialis.
机译：[EN]我们检查了海星Marthasterias glacialis（Lamk。）的丰度和大小在潮下珊瑚礁上是否表现出深度依赖的划分。我们检验了以下假设：食物可获得性的差异会导致沿深度梯度的生境分配。冰川分枝杆菌的丰度和大小在4个深度层记录：0-4 m，4-8 m，8-12 m和> 12 m；我们还记录了他们捕食的食物数量。冰川分枝杆菌的丰度和大小随深度而降低。贻贝（Mytilus galloprivincialis）是所有深度地层中被捕食最多的食物，其次是腹足动物，海胆和藤壶。与海胆和腹足类动物相比，在进食实验中，M。glacialis还消耗了大量贻贝。 Galloprivincialis床的丰度随深度而降低。冰川支原体的丰富度和大小随深度的减少与最消耗的猎物（贻贝）的衰减之间的明确联系表明，尽管海浪中的波浪相关湍流，食物的可获得性可能在该海星的垂直分布中发挥重要作用。潮下带的前几米也可能会限制冰川分枝杆菌的丰度。

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    Tuya, F.; Duarte, Pedro;

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  • 年度 2012
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