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首页> 外文期刊>Journal of sea research >Habitat use of shrimps in the intertidal and shallow subtidal seagrass beds of the tropical Banc d'Arguin, Mauritania
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Habitat use of shrimps in the intertidal and shallow subtidal seagrass beds of the tropical Banc d'Arguin, Mauritania

机译：在毛里塔尼亚热带班奇达贡的潮间带和浅潮带下海草床上对虾的栖息地使用

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The Banc d'Arguin in Mauritania is an area characterised by shallow waters and tidal flats with extensive seagrass beds. The aim of this study was to determine the role of the Banc d'Arguin tidal flats as a habitat and a nursery for shrimps. Shrimps were sampled in the Baie d'Aouatif in the intertidal (ponds, Zostera noltii seagrass beds and bare sediment) with a push net during high and low tide, a beam trawl during high tide and in the subtidal (Cymodocea nodosa and Zostera noltii seagrass beds) with a beam trawl during low and high tide from January to March 2002. In total, eleven shrimp species (9349 individuals) were found, the most abundant of which were Palaemon elegans, Hippolyte longirostris, H. inermis (in subtidal) and Peneaus spp., whereas Athanas nitescens, Leander tenuicornis, Palaemon adspersus, Pontophilus fasciatus, Sicyonia carinata and Processa edulis subsp. crassipes were less abundant. At high tide in the intertidal all species were mainly found in sheltered areas (ponds and seagrass) rather than in unvegetated habitats. Mark-recapture experiments showed that shrimps migrate between intertidal ponds during high tide. Densities in the subtidal were similar during high and low tide, suggesting that there is no substantial tidal migration to and from the tidal flats for any of the species. Two subtidal shrimp species seemed to prefer Cymodocea nodosa beds. A large fraction of the individuals of five shrimp species carried eggs. Ten of the eleven species caught were also found as juveniles. The results of this study, and earlier studies, indicate that many shrimp species reproduce in or near the tidal-flat area of the Banc d'Arguin. Some shrimp species, notably Penaeus kerathurus and P. notialis, are likely to use the area as a nursery, migrating offshore as adults. This suggests that the Banc d'Arguin is an important resource for commercial fishery.
机译：毛里塔尼亚的阿尔金银行（Banc d'Arguin）是一个以浅水和滩涂为特征的区域，那里有大量海草床。这项研究的目的是确定Banc d'Arguin滩涂作为虾的栖息地和苗圃的作用。在潮间带的Baie d'Aouatif（池塘，诺斯特海藻海藻床和裸露的沉积物）中对虾进行采样，在涨潮和退潮时使用推网，在涨潮时以及潮间带（网状藻和诺斯特海藻）使用网状拖网进行采样。在2002年1月至3月的涨潮和退潮期间使用束拖网。总共发现了11种虾类（9349种），其中最丰富的是秀丽线虫，长沙棘，无脊椎动物（潮间带）和Peneaus spp。，而Athanas nitescens，Leander tenuicornis，Palaemon adspersus，faponciatus fasciatus，Sicyonia carinata和Processa edulis subsp。十字花科植物较少。在潮间带涨潮时，所有物种主要发现在庇护区（池塘和海草），而不是在无植被的栖息地。标记捕获实验表明，在涨潮期间虾在潮间池塘之间迁移。在涨潮和退潮期间，潮汐下层的密度相似，这表明任何种类的潮汐层间都没有实质性的潮汐迁移。两种潮下对虾物种似乎更喜欢Cymodocea nodosa病床。五对虾种类的很大一部分个体都携带卵。在被捕的11种物种中，有10种还被发现为少年。这项研究以及早期研究的结果表明，许多虾物种在阿尔金岛的潮滩地区或附近繁殖。一些虾类物种，特别是对虾（Penaeus kerathurus）和公对虾（P. notialis），很可能将这一地区用作苗圃，成年后向海外迁移。这表明，Arguin银行是商业渔业的重要资源。

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