Biogeography of epibenthic crustaceans on the shelf and upper slope off the Iberian Peninsula Mediterranean coasts:: implications for the establishment of natural management areas
Biogeography of epibenthic crustaceans on the shelf and upper slope off the Iberian Peninsula Mediterranean coasts:: implications for the establishment of natural management areas
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DOI：
10.3989/scimar.2002.66s2183
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发表时间：
2002-07-01
期刊：
影响因子：
1.4
通讯作者：
Torres, P
中科院分区：
文献类型：
--
作者：
Abelló, P;Carbonell, A;Torres, P
根据1994年至1999年期间每年春季沿着伊比利亚半岛地中海沿岸（从直布罗陀海峡到Creus角）进行的6次底拖网调查收集的数据，分析了大陆架和上斜坡下至800米深度的底表甲壳类动物的出现和水深分布模式。共研究了598个有效的拖运物，共提供了108种十足类，两种口足类，一种磷虾，一种糠虾和一种等足类。根据地貌特征，将研究区分为七个区，并分别分析了每个区的发生模式和深度丰度。每个鱼种的详细水深分布数据均已列出。沿着研究区域可以辨别出两个主要的地理区域，它们大致可以在帕洛斯角分开：西南部的阿尔沃兰海和帕洛斯角西北部的地中海西北部（黎凡特海和加泰罗尼亚海）。阿尔沃兰海（地中海最西部地区）的大陆架极其狭窄，而地中海西北部的大陆架则要宽得多。大西洋沃茨进入地中海的影响在阿尔沃兰海特别强烈，这表明大西洋物种丰富度特别高。在西地中海范围内，阿尔沃兰海区域显示出重要的动物区系特征，因此可将其视为一个可能的单独的底层渔业自然管理区。
The patterns of occurrence and bathymetric distribution of epibenthic crustaceans on the continental shelf and upper slope down to a depth of 800 m are analysed based on data gathered during six demersal trawl surveys performed annually in spring along the Mediterranean coasts of the Iberian Peninsula (from the Straits of Gibraltar to Cape Creus) between 1994 and 1999. A total of 598 valid hauls has been studied providing a total of 108 species of decapods, two stomatopods, one euphausiid, one mysid and one isopod. The study area has been subdivided into seven sectors according to their geomorphological characteristics, and the patterns of occurrence and abundance by depth have been analysed separately for each of the sectors. Detailed data on bathymetric distribution are presented for each species. Two main biogeographical areas can be discerned along the study area, which can approximately be separated at Palos Cape: the Alboran Sea to the southwest, and the northwestern Mediterranean (Levantine and Catalan Seas) northwest of Palos Cape. The continental shelf in the Alboran Sea (the most western area of the Mediterranean) is extremely narrow whereas it is much wider in the northwestern Mediterranean. The influence of Atlantic waters entering the Mediterranean is particularly strong in the Alboran Sea which shows a particularly high species richness of Atlantic affinity. Within the context of the western Mediterranean Sea, the Alboran Sea region shows important faunistic characteristics such that it might be considered as a possible separate natural management area for demersal fisheries.