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首页> 外文期刊>Estuarine Coastal and Shelf Science >Spatial versus temporal patterns in fish assemblages of a tropical estuarine coastal lake: The Ebrie Lagoon (Ivory Coast)
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Spatial versus temporal patterns in fish assemblages of a tropical estuarine coastal lake: The Ebrie Lagoon (Ivory Coast)

机译：热带河口沿海湖泊鱼群的时空格局：埃布里泻湖（象牙海岸）

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摘要

The fish assemblages of the Ebrie lagoon (Ivory Coast) were sampled by experimental fishing over the entire lagoon using a purse seine net. The sampling was conducted in the two main hydroclimatic seasons for this ecosystem, i.e. in the dry season (March-April) and in the wet season (August—September). The results obtained showed a fish assemblage organized around a consistently occurring group of twenty species. When analysed in terms of ecological categories, the seasonal influence led to a cycle in the assemblages from freshwater to marine around this permanent species pool, with a seasonal renewal of the assemblage. At the scale of the lagoon, there were variations in the composition of the assemblages that clearly distinguished the western part from the eastern one. The limit was situated at the Vridi canal, a wide artificial channel permanently connecting the lagoon to the sea. To the west, the assemblage was characterised by a strong spatial uniformity and low seasonal variability. To the east, the assemblage formed two different entities; one assemblage with pronounced freshwater affinities occurring in a side arm and the other assemblage with great seasonal variability under the alternating influence of seawater in the dry season and freshwater in the wet season. This part of the lagoon functioned somewhat like a typical estuary.
机译：埃布里泻湖（象牙海岸）的鱼群是通过使用围网围网的整个泻湖进行实验性捕捞而取样的。在该生态系统的两个主要水气候季节进行了采样，即在旱季（3月至4月）和雨季（8月至9月）。获得的结果表明，鱼群围绕一贯出现的二十种物种进行了组织。当从生态类别的角度分析时，季节性影响导致该永久物种库周围的组合从淡水到海洋循环，并随着组合的季节性更新。在泻湖的规模上，组合的组成存在差异，从而使西部地区与东部地区明显地区分开。极限位于弗里迪运河，弗里迪运河是一条宽阔的人工河道，永久地将泻湖与海洋相连。在西方，这种组合的特征是强烈的空间均匀性和较低的季节变化性。在东部，集合体形成了两个不同的实体。一个组合在侧臂上具有明显的淡水亲和力，而另一个组合在干旱季节的海水和潮湿季节的淡水交替影响下具有很大的季节性变化。泻湖的这部分功能有点像典型的河口。

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