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首页> 外文期刊>Marine ecology progress series >Large spatial scale variation of demersal fish assemblage structure on the continental shelf of the NW Mediterranean Sea
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Large spatial scale variation of demersal fish assemblage structure on the continental shelf of the NW Mediterranean Sea

机译：地中海西北部大陆架上的沉鱼组合结构的空间尺度变化

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The spatial structure of demersal fish assemblages on the continental shelf of the NW Mediterranean Sea was examined on a large scale between the Straits of Gibraltar and the Gulf of Lions. In contrast to its predominant role in the spatial distribution of species composition, described worldwide, it seems depth has only a limited effect on the distribution patterns of the total abundance and diversity of demersal fishes. In addition, evidence is provided for the division of the whole study area into 3 geographical fish assemblages. The influence of Atlantic inputs and the semi-permanent Almeria-Oran hydrographic front play a key role in defining the Alboran Sea as a specific fish fauna area. Moreover, the clear differentiation between 2 distinct assemblages in the Gulf of Lions and the Catalan Sea could be partly linked to the North Balearic front. These results contribute to the current debate on the definition of spatial units for the purpose of demersal fisheries management. They also stress the complexity of developing an ecosystem approach which deals simultaneously with species composition and biodiversity aspects of ecosystems management.
机译：在直布罗陀海峡和狮子湾之间，对西北地中海大陆架上的沉鱼组合的空间结构进行了大规模研究。与在全世界范围内描述的其在物种组成的空间分布中的主要作用相反，似乎深度对沉鱼的总丰度和多样性的分布方式只有有限的影响。此外，还提供了将整个研究区域划分为3种地理鱼类组合的证据。大西洋投入物和半永久性的阿尔梅里亚-奥兰河水文锋线的影响在将阿尔伯兰海定义为特定鱼类区系方面发挥着关键作用。此外，狮子湾和加泰罗尼亚海的两种不同组合之间的明显区别可能部分与北巴利阿里锋有关。这些结果促进了当前关于以底层渔业管理为目的的空间单位定义的辩论。他们还强调了开发生态系统方法的复杂性，该方法同时处理生态系统管理的物种组成和生物多样性方面。

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