ABSTRACT Species that exploit the same type of environmental resources are defined as a guild, which have similar needs in the use of food or habitat. It was analyzed the diet of five waterbirds’ offsprings species (Neotropic Cormorant (Nannopterum brasilianus), Reddish Egret (Egretta rufescens), Boat-billed Heron (Cochlearius cochlearius), Snowy Egret (Egretta thula) and Great Egret (Ardea alba)), by prey identification and calculated the relative importance, overlap and breadth diet. The general diet of the piscivorous guild consisted of 17 fish species from 13 genera and eight families. The highest overlap was between the Reddish Egret and Boat-billed Heron. Fish species dominated the diets of all studied waterbirds, Poecilia velifera was the most abundant prey species in each of the birds, suggesting that they are abundant in the wetlands system of northern Yucatan. Diet overlap in waterbirds species depends on the use of resources and feeding habitat. Since reproductive success largely depends on the availability of food resources, mainly of resident or estuarine fishes. The information about diet is important for the conservation of waterbirds.

中文翻译：

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墨西哥湾东南部热带红树林水鸟的饲养生态

摘要 开发相同类型环境资源的物种被定义为一个公会，它们在食物或栖息地的使用方面具有相似的需求。分析了五种水鸟后代物种（新热带鸬鹚（Nannopterum brasilianus）、红白鹭（Egretta rufescens）、船嘴鹭（Cochlearius cochlearius）、白鹭（Egretta thula）和大白鹭（Ardea）的饮食，通过对猎物的识别和计算，计算出食物的相对重要性、重叠度和广度。食鱼行会的一般饮食包括来自 13 个属和 8 个科的 17 种鱼类。重叠度最高的是红白鹭和船嘴鹭之间。鱼类在所有研究的水鸟的饮食中占主导地位，Poecilia velifera 是每种鸟类中最丰富的猎物，表明它们在尤卡坦北部的湿地系统中很丰富。水鸟物种的饮食重叠取决于资源的使用和觅食栖息地。由于繁殖成功在很大程度上取决于食物资源的可用性，主要是居民或河口鱼类。有关饮食的信息对于保护水鸟很重要。