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首页> 外文期刊>ICES Journal of Marine Science >The role of closed areas in rebuilding monkfish populations in the Gulf of Maine
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The role of closed areas in rebuilding monkfish populations in the Gulf of Maine

机译：禁区在缅因湾重建安康鱼种群中的作用

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The use of fish closures as a management tool to protect juvenile fish habitat and adult spawning grounds has become increasingly popular, although knowledge of the direct effects of marine closures on juvenile fish populations is limited. Given that monkfish landings account for a considerable percentage of the monetary value derived from the groundfish fishery in new England, investigating the factors that influence monkfish population dynamics will assist managers in sustaining this important natural resource. We conducted bottom-trawl surveys to determine the effects of closure status [inside vs. outside the Western Gulf of Maine Closure Area (WGMCA)] and habitat type (mud bottom in isolation from gravel or cobble bottom vs. mud that is next to these more complex habitats) on the distribution, abundance, and diet composition of monkfish (Lophius americanus) in the Gulf of Maine. Surprisingly, the abundance of adult monkfish did not differ in vs. out of the closure, and juvenile monkfish were more abundant outside of the WGMCA, where they also exhibited higher feeding intensity and consumed more prey biomass. Monkfish diet and condition results implied that the boulder and ledge bottom is essential monkfish habitat and that these effects were independent of the WGMCA.
机译：尽管对海洋封锁对少年鱼类种群的直接影响的了解有限，但使用鱼类封锁作为保护少年鱼类生境和成年产卵场的管理工具已变得越来越普遍。考虑到僧侣上岸量在新英格兰的底层鱼类捕捞中所占货币价值中占相当大的百分比，因此调查影响僧侣种群动态的因素将有助于管理者维持这一重要的自然资源。我们进行了底拖网调查，以确定封闭状态[缅因州西湾封闭区（WGMCA）内部与外部的封闭状态]和栖息地类型（与砾石或卵石底部隔离的泥浆底部与旁边的泥浆相比）的影响更复杂的栖息地）在缅因湾的安康鱼（美洲Lophius）的分布，丰度和饮食组成上。出人意料的是，成年安康鱼的丰度在关闭时与未关闭时没有差异，在WGMCA之外，幼安康鱼更丰富，在那里它们也表现出较高的摄食强度并消耗了更多的猎物生物量。安康鱼的饮食和状况结果表明，巨石和壁架底部是安康鱼必不可少的栖息地，这些影响与WGMCA无关。

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