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首页> 外文期刊>ICES Journal of Marine Science >Feeding hotspots for four northwest Atlantic groundfish species
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Feeding hotspots for four northwest Atlantic groundfish species

机译：西北大西洋四种底栖鱼类的觅食热点

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摘要

We used predator distribution and stomach content data to estimate the annual per capita rate of consumption for four representative predator species from the northwestern Atlantic Ocean, and considered how consumption is influenced by depth, bottom salinity, sediment grain size, location variables, and species-specific diet components. We found that geographic variables and species-specific prey resources were significantly associated with consumption rates, a pattern consistent with predator-prey theory. Prey categories comprised of fish were particularly important for a more mobile predator (silver hake Merluccius bilinearis), whereas benthic invertebrate prey were consistently important for a more sedentary predator (little skate Raja erinacea). Hotspots in consumption rates that overlap with particular prey resources were highlighted by the significance of location variables (longitude) for winter flounder Pseudopleuronectes americanus, silver hake, little skate, and sea raven Hemitripterus americanus. Depth was an important explanatory factor for consumption by little skate, but the explanatory value of abiotic habitat factors was low for the other three species. Greater emphasis on species-specific food habits, migratory patterns, and ecological interactions at the synoptic scales relevant to fisheries is needed for fisheries management.
机译：我们使用捕食者的分布和胃中含量数据估算了西北大西洋上四种代表性捕食者物种的年人均食用率，并考虑了食用量如何受到深度，底部盐度，沉积物粒度，位置变量和物种的影响-特定的饮食成分。我们发现地理变量和特定物种的猎物资源与消费率显着相关，这与捕食者－猎物理论相一致。鱼类组成的猎物类别对于更具活动性的捕食者（银色无须鳕线虫）尤其重要，而底栖无脊椎动物捕食者对于久坐的捕食者（小溜冰鞋Raja erinacea）始终具有重要意义。与美洲比目鱼，银鳕鱼，小滑冰和美洲掠夺半翅目比目鱼相比，位置变量（经度）的重要性突出了与特定猎物资源重叠的消费率热点。深度是小轮滑冰消费的重要解释因素，但其他三个物种的非生物栖息地因素的解释价值较低。渔业管理需要在与渔业有关的天气尺度上更加强调特定物种的饮食习惯，迁徙模式和生态相互作用。

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