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首页> 外文期刊>Reviews in Fish Biology and Fisheries >Dynamics of snow crab (Chionoecetes opilio) movement and migration along the Newfoundland and Labrador and Eastern Barents Sea continental shelves
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Dynamics of snow crab (Chionoecetes opilio) movement and migration along the Newfoundland and Labrador and Eastern Barents Sea continental shelves

机译：雪蟹的动态（Chionoecetes Opilio）沿着纽芬兰和拉布拉多和东部的牧人和东部牧人海陆架的运动和迁移

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摘要

This study uses survey and tagging data and cluster analysis to interpret dynamics of ontogenetic movements and seasonal migrations in snow crab (Chionoecetes opilio) along the Newfoundland and Labrador (NL) continental shelves. Most historic literature from Atlantic Canada suggests snow crab undertake small-scale ontogenetic movements while observations of seasonal migrations had been near-exclusive to the inshore. Information on both types of movement in the most spatially expansive offshore region of Atlantic Canada, in NL, was lacking. We find that that both ontogenetic movements and seasonal migrations occur in most areas of the NL offshore, with ontogenetic movements generally down-slope and seasonal migrations generally upslope. Conservative estimates of average ontogenetic movements range from 54 to 72 km for both males and females in the largest offshore regions while seasonal migrations are slightly smaller, with two independent studies on the Grand Bank producing average estimates of 43-46 km and an adjacent tagging study in a smaller inshore bay producing an average estimate of 25 km. Ontogenetic movements appear associated with a search for warm water while seasonal migrations appear associated with both mating and molting in shallow water. On average, morphometrically mature crab of both sexes move less vertical distance than morphometrically immature crab during seasonal migrations. We investigate plausible explanations for ontogenetic movements and spring migrations and detail how bottom temperature affects crab distribution and life history dynamics. We further document movement patterns from tagging studies on the burgeoning snow crab stock in the Eastern Barents Sea toward establishing consistencies in species behaviour on the global scale. Finally, we discuss explanations for historical disparities in the literature between scales of movement for snow crab in the Eastern Bering Sea of Alaska versus Atlantic Canada and advance perspectives on life history theory for the species.
机译：本研究使用调查和标记数据和集群分析，以沿着纽芬兰和拉布拉多（NL）欧式架子的雪蟹（Chionoecetes Opilio）中的Ontogence运动和季节迁徙的动态。大西洋加拿大的大多数历史文学建议雪蟹在季节迁徙的观察时临近雪蟹队进行了小规模的植入运动。缺乏关于大西洋加拿大最空间广泛的离岸地区的两种运动的信息。我们发现，在NL离岸的大多数区域发生了围母运动和季节迁移，通常是沿着斜坡和季节性迁移的Ontogence动作。在最大的海上地区的男性和女性中，平均围粒体运动的保守估计范围为54至72公里，而季节性迁移略小，则宏伟银行的一个独立研究，生产平均估计值43-46公里和相邻的标签研究在一个较小的近岸湾，平均估计为25公里。与浅水中的配合和蜕皮一起出现的季节性迁移时，与温水的搜索相关联的植入运动。平均而言，两性成熟螃蟹在季节迁移期间，两性的成熟螃蟹在季节性迁移期间的情况下移动距离较少。我们调查了对植入运动和弹簧迁移的合理解释和细节底部温度如何影响螃蟹分布和生命历史动态。我们进一步记录了在东部寒须海中新的雪蟹股标签研究的转移模式，以在全球规模上建立物种行为的常量。最后，我们讨论了阿拉斯加东部雪蟹在雪蟹队的文献中的历史差异的解释，与大西洋加拿大，提前看着物种生活史理论的前景。

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