Horizontal movements, vertical-habitat utilization and diet of the jumbo squid (Dosidicus gigas) in the Pacific Ocean off Baja California Sur, Mexico
Horizontal movements, vertical-habitat utilization and diet of the jumbo squid (Dosidicus gigas) in the Pacific Ocean off Baja California Sur, Mexico
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DOI：
10.1016/j.pocean.2010.04.017
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发表时间：
2010-07-01
影响因子：
4.1
通讯作者：
Ramos-Castillejos, Jorge
中科院分区：
文献类型：
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作者：
Bazzino, Gaston;Gilly, William F.;Ramos-Castillejos, Jorge
我们部署了四个弹出式档案传输（PAT）标签上的巨型鱿鱼（Dosidicus gigas）收集在太平洋关闭的主要入口，以马格达莱纳湾的下加利福尼亚半岛在2005年6月。这是在加州湾以外的地区首次成功地在巨型鱿鱼上部署PAT标签。通过ARGOS卫星系统获得了其中三个标签的简要数据：第四个标签已实际回收。所有被标记的鱿鱼往往在标记后在浅大陆架上停留几天，然后转移到离岸更深的水域。四只鱿鱼中有三只似乎向南迁移，而第四只则留在马格达莱纳湾近海。所有的鱿鱼花了大部分白天的时间在深度与缺氧的氧气最低层，并在夜间，他们花了大部分时间在上50米的水柱。胃内容物分析和标签的温度-深度数据在标记后的第一天显示，鱿鱼饲养的中上层红蟹（Pleuroncodes planipes）和几个较大的，浅海鱼类在大陆架关闭马格达莱纳湾在季节性近岸涌升。将我们的结果与以前在加州湾收集的结果进行比较，发现Dosidicus gigas可以改变其行为和饮食，以适应当地的环境条件。这种适应性可能是影响D.吉加斯入侵和殖民新的地区。(C)2010爱思唯尔有限公司版权所有。
We deployed four pop-up archival-transmitting (PAT) tags on jumbo squid (Dosidicus gigas) collected in the Pacific Ocean off the main entrance to Magdalena Bay on the Baja California peninsula in June 2005. This is the first successful deployment of PAT tags on jumbo squid in an area outside the Gulf of California. Summary data were obtained through the ARGOS satellite system for three of the tags: the fourth tag was physically recovered. All of the tagged squid tended to remain on the shallow continental shelf for several days after tagging and then moved offshore into deeper water. Three of the four squid appeared to migrate in a general southerly direction while the fourth remained offshore of Magdalena Bay. All of the squid spent most daylight hours at depths that were associated with the hypoxic oxygen minimum layer, and at night they spent a majority of time in the upper 50 m of the water column. Stomach content analysis and tag temperature-depth data during the first days after tagging revealed that the squid were feeding on pelagic red crabs (Pleuroncodes planipes) and several larger, neritic fishes over the continental shelf off Magdalena Bay during a seasonal nearshore upwelling. Comparison of our results with those previously collected in the Gulf of California reveal that Dosidicus gigas can vary its behavior and diet to suit local environmental conditions. This adaptability is likely to be an important factor in the ability of D. gigas to invade and colonize new areas. (C) 2010 Elsevier Ltd. All rights reserved.