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首页> 外文期刊>Estuarine Coastal and Shelf Science >Feeding ecology and trophic relationships of fish species in the lower Guadiana River Estuary and Castro Marim e Vila Real de Santo Antonio Salt Marsh
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Feeding ecology and trophic relationships of fish species in the lower Guadiana River Estuary and Castro Marim e Vila Real de Santo Antonio Salt Marsh

机译：瓜迪亚纳河下游河口和Castro Marim e Vila Real de Santo Antonio Salt Marsh鱼类的摄食生态学和营养关系

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In this study we analyze the feeding ecology and trophic relationships of some of the main fish species (Soleidae, Moronidae, Mullidae, Sparidae, Mugilidae, and Batrachoididae) of the lower Estuary of the Guadiana River and the Castro Marim e Vila Real de Santo Antonio Salt Marsh. We examined the stomachs of 1415 fish caught monthly between September 2000 and August 2001. Feeding indices and coefficients were determined and used along with the results of multivariate analysis to develop diagrams of trophic interactions (food webs). Results show that these species are largely opportunistic predators. The most important prey items are amphipods, gobies (Gobiidae), shrimps (Palaemon serratus and Crangon crangon), and polychaete worms. The lower Estuary and associated salt marshes are important nurseries and feeding grounds for the species studied. In this area, it is therefore important to monitor the effects of changes in river runoff, nutrient input, and temperature that result from construction of the Alqueva Dam upstream.
机译：在这项研究中，我们分析了瓜迪亚纳河下游河口和Castro Marim e Vila Real de Santo Antonio的一些主要鱼类（Soleidae，Moronidae，Mullidae，Sparidae，Mugilidae和Batrachoididae）的摄食生态学和营养关系。盐沼。我们检查了2000年9月至2001年8月之间每月捕获的1415条鱼的胃。确定了摄食指数和系数，并将其与多变量分析的结果一起用于建立营养相互作用（食物网）图。结果表明，这些物种主要是机会性掠食者。最重要的猎物是两栖动物，虾虎鱼（Gobiidae），虾（Palaemon serratus和Crangon crangon）和多毛et蠕虫。下游河口和相关的盐沼是所研究物种的重要苗圃和觅食地。因此，在该地区，重要的是监测上游Alqueva大坝建设对河流径流，养分输入和温度变化的影响。

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