ABSTRACT: Bivalve aquaculture sites attract a variety of large benthic species. Previous studies have shown that American lobster Homarus americanus are more abundant in mussel Mytilus edulis farms than in areas outside of them, suggesting that farms provide lobsters with adequate food and shelter. This study used acoustic telemetry to evaluate the influence of longline mussel farms on lobster movement behavior. In 2014, 60 lobsters were acoustically tagged on a boat and released in a mussel farm and at 2 reference sites outside the farm. Most lobsters (92%) left the monitored area within 1 d post-tagging; those released in reference sites moved northeast, whereas those released in the farm moved in random directions. Of the 16 lobsters that stayed or returned to the study area over the course of the 2 mo experiment, 10 displayed nomadic movements, 3 displayed small, local movements—presumably associated with foraging behavior, and 3 displayed both movements. The time lobsters spent within a site, distance travelled, and walking speed did not differ between the farm and reference sites. A second experiment was done in 2017 over 2 mo to evaluate tagging method (‘on boat’ and in situ tagging) effects on lobster movement behavior. The experiment followed movements by 50 lobsters, half for each treatment, and showed that tagging method can affect walking speed during the first 24 h, but had no impact on the residence time and the distance travelled by the lobsters.

中文翻译：

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美国龙虾 Homarus americanus 的运动与近海贻贝 Mytilus edulis 水产养殖有关

摘要：双壳类水产养殖场吸引了各种大型底栖物种。以往的研究表明，美洲龙虾Homarus americanus在贻贝贻贝中含量更高农场比在它们以外的地区，这表明农场为龙虾提供了足够的食物和住所。本研究使用声学遥测来评估延绳贻贝养殖场对龙虾运动行为的影响。2014 年，60 只龙虾在船上进行了声学标记，并在贻贝养殖场和养殖场外的 2 个参考点放归。大多数龙虾 (92%) 在标记后 1 d 内离开了监测区域；那些在参考地点被释放的人向东北移动，而那些在农场被释放的人则向随机方向移动。在 2 个月的实验过程中停留或返回研究区域的 16 只龙虾中，10 只表现出游牧运动，3 只表现出小的局部运动——可能与觅食行为有关，3 只表现出两种运动。龙虾在一个站点内度过的时间，旅行的距离，农场和参考​​地点之间的步行速度没有差异。2017 年在 2 个月内完成了第二次实验，以评估标记方法（“在船上”和原位标记）对龙虾运动行为的影响。实验跟踪了 50 只龙虾的运动，每个处理一半，表明标记方法可以影响前 24 小时的步行速度，但对龙虾的停留时间和行进距离没有影响。