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首页> 外文期刊>ICES Journal of Marine Science >Dredging for edible cockles (Cerastoderma edule) on intertidal flats: short-term consequences of fisher patch-choice decisions for target and non-target benthic fauna
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Dredging for edible cockles (Cerastoderma edule) on intertidal flats: short-term consequences of fisher patch-choice decisions for target and non-target benthic fauna

机译：潮间带的可食用蛤（Cerastoderma edule）的疏:：渔民选择目标和非目标底栖动物选择的短期后果

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摘要

Intertidal flats in the Dutch Wadden Sea are protected by national and international treaties. Still, mechanical dredging for edible cockles Cerastoderma edule was allowed in 74% of 1200 km2 of intertidal flats. Cumulatively, between 1992 and 2001,19% of the intertidal area was affected by mechanical cockle-dredging at least once. On the basis of a grid of 2650 stations sampled annually, we evaluate the extent to which cockle-dredging from 1998 to 2003 was selective with respect to non-target macrozoobenthic intertidal fauna. In all 4 years that comparisons could be made, to-be-dredged areas contained greater diversity of macrobenthic animals than areas that remained undredged. Targeted cockles were 2.5 times more abundant in areas that were to be dredged shortly, but other species also occurred in higher densities in these areas. Small amphipods and some bivalves occurred less in to-be-dredged areas than elsewhere. In terms of short-term responses to dredging, four non-target species showed a significant decrease in abundance 1 year after dredging. Only Tellina tenuis showed an increase a year after dredging.
机译：荷兰瓦登海的潮间带公寓受到国家和国际条约的保护。尽管如此，在1200平方公里的潮间带中的74％仍允许对可食用的蛤类皮肤粉刺进行机械疏ed。在1992年至2001年之间，潮间带面积的累计累积至少有19次受到机械鸟蛤的影响。在每年采样的2650个站点的网格的基础上，我们评估了1998年至2003年间鸟蛤疏-相对于非目标大齿足类潮间动物的选择性程度。在可以比较的所有4年中，要挖泥的区域比没有挖泥的区域包含更大的底栖动物多样性。在不久要疏dr的区域中，有针对性的鸟蛤的数量增加了2.5倍，但是在这些区域中密度较高的其他物种也出现了。小型两栖动物和一些双壳类动物在待挖区域的发生率比其他地方少。就疏dr的短期反应而言，疏four后1年，四种非目标物种的丰度显着下降。挖泥一年后，只有Tellina tenuis有所增加。

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