Movement Patterns of Hooded Seals (Cystophora cristata) in the Northwest Atlantic Ocean during the Post-Moult and Pre-Breed Seasons
Movement Patterns of Hooded Seals (Cystophora cristata) in the Northwest Atlantic Ocean during the Post-Moult and Pre-Breed Seasons
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西北大西洋冠海豹（Cystophora cristata）在换毛后和繁殖前季节的运动模式
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发表时间：
2009
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通讯作者：
A. Rosing
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作者：
Julie M. Andersen;Y. F. Wierma;G. Stenson;M. Hammill;A. Rosing
冠海豹（Cystophora cristata）在西北大西洋期间换羽后和繁殖前的运动模式还不清楚。在这里，我们详细描述了21海豹的运动模式，这一时期的基础上收集的信息，从卫星连接的时间深度记录器（SLTDRs）。这项研究提供了重要的基线信息，需要了解的生态要求和模式的栖息地选择的物种。成年和亚成年的冠海豹标记SLTDRs后，直接在格陵兰东南部蜕皮在2004年7月，2005年和2007年。由于标记日期和到达繁殖地的日期不同，使用了8月1日至2月28日之间的数据，所有海豹的跟踪持续时间为211天（2005年为212天），但一只幼海豹的标记仅持续了154天。标签产生36107个位置固定（SD = 410.64，平均值= 1719.38）。虽然在迁移过程中海豹的轨迹之间存在个体差异，但种群的总体模式相似。在7月蜕皮后，个体沿着大陆架地区沿着前往戴维斯海峡和巴芬湾，然后沿着拉布拉多大陆架向南沿着移动，直到3月到达繁殖地。雌性倾向于穿过拉布拉多海，到达拉布拉多大陆架，然后前往巴芬湾地区，而雄性倾向于直接前往那里。大多数海豹在3月份结束了在前线（纽芬兰和拉布拉多南部），尽管一些标记的海豹可能属于戴维斯海峡繁殖种群，一只雄性海豹属于圣劳伦斯湾繁殖种群。7只海豹表现出向东迁移的趋势，可能与东北大西洋种群重叠。这将支持泛系种群结构的理论。
Movement patterns of hooded seals (Cystophora cristata) in the Northwest Atlantic in the period following moulting and prior to breeding are not well known. Here, we describe in detail the movement patterns of 21 seals for this period based on information gathered from satellite linked time depth recorders (SLTDRs). This study provides important baseline information necessary to understand the ecological requirements and patterns in habitat selection for the species. Adult and sub-adult hooded seals were tagged with SLTDRs directly after moulting in SE Greenland during July 2004, 2005 and 2007. Due to variation in tag date and arrival date to the breeding grounds, data between 1 Aug–28 Feb were used which gave all seals a track duration of 211 days (212 in 2005) except for one juvenile where the tag lasted for only 154 days. The tags yielded 36 107 location fixes (SD = 410.64, mean = 1 719.38). Although there was individual variation between seal trajectories during migration, the population shared a similar overall pattern. After moulting in July individuals travelled along the continental shelf area up to Davis Strait and Baffin Bay, thereafter moving southwards along the Labrador shelf until they arrived at the breeding grounds by March. Females tended to cut across the Labrador Sea and arrived at the Labrador shelf before heading up to the Baffin Bay area, while males tended to move straight there. The majority of the seals ended up at the Front (off Newfoundland and Southern Labrador) by March although a few of the tagged seals may have belonged to the Davis Strait breeding population and one male belonged to the Gulf of St. Lawrence breeding population. Seven seals displayed an eastward migratory pull and might have overlapped with the Northeast Atlantic population. This would support the theory of a panmitic population structure.