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首页> 外文期刊>Marine ecology >Feeding behavior in Caribbean surgeonfishes varies across fish size, algal abundance, and habitat characteristics
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Feeding behavior in Caribbean surgeonfishes varies across fish size, algal abundance, and habitat characteristics

机译：加勒比海科鱼类的喂养行为在鱼类大小，藻类丰度和栖息地特征上变化

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摘要

Feeding behavior of coral reef fishes often determines their species-specific ecological roles. We studied the two most common Caribbean surgeonfishes (Acanthurus coeruleus and Acanthurus tractus) to examine their species-specific grazing rates and feeding preferences and how these differed with environmental context. We quantified the feeding activity of both surgeonfishes at four spur and groove reefs in the Florida Keys, USA, that varied in fish abundance, rugosity, algal community composition, and sediment loading. Overall, A. tractus fed twice as fast as A. coeruleus. Both species selected for turf algae but avoided feeding on turf algae that had become laden with sediment. Selectivity for upright macroalgae was more complex with A. tractus targeting Dictyota spp., while A. coeruleus avoided Dictyota spp. relative to the alga's abundance. Both species selected for epiphytes growing on other organisms such as macroalgae and sponges. However, several of these feeding patterns changed with ontogeny. For example, larger individuals of both species fed more frequently on long, sediment-laden algal turf and less frequently on Dictyota spp. compared to smaller sized individuals. In addition, A. tractus also increased its preference for upright calcareous algae as they attained larger sizes. Overall, the disparity in feeding preferences of surgeonfishes likely indicates subtle differences in species-specific ecological roles. Both A. coeruleus and A. tractus likely prevent development of turf algae and thus maintain algal communities in the early stages of succession. Additionally, A. tractus may also help reduce macroalgal abundance by targeting common macroalgal species.
机译：珊瑚礁鱼的喂养行为往往决定了他们的物种特异性生态作用。我们研究了两种最常见的加勒比海疗法（Acanthurus Coeruleus和Acanthurus cractus），以检查它们的物种特异性放牧率和饲养偏好以及这些环境的偏好以及这些环境的不同。我们量化了美国佛罗里达群岛群群的四个刺骨和沟槽礁的饲养活性，在鱼类丰度，难以，藻类群落组合物和沉积物负荷中变化。总体而言，A.达颅夫喂他们的两倍，如A. Coeruleus。两种用于草皮藻类的物种，但避免喂养已经沉重沉积物的草皮藻类。直立型大甲杆的选择性更复杂，涉及靶向Dictyota SPP，而A. Coeruleus避免了Dictyota SPP。相对于藻类的丰富。两种所选择的两种物种在其他生物中生长，如甲状腺果糖和海绵。然而，这些饲养模式中的几种随着组织化而变化。例如，两种物种的较大个体更频繁地喂养长，沉积的藻类藻类，并且在dictyota spp上较少。与较小的尺寸的人相比。此外，A.1Actus还增加了对直立钙质藻类的偏好，因为它们达到了更大的尺寸。总体而言，外科鱼类喂养偏好的差异可能表明物种特异性生态作用的微妙差异。 A. Coeruleus和A.托术可能预防草皮藻类的发育，从而维持连续的早期阶段的藻类社区。另外，A.塔梗也可以通过靶向常见的大甲术物种来帮助减少大规模丰富。

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