Sex-related differences in the postmolt distribution of Weddell seals ( Leptonychotes weddellii ) in the southern Weddell Sea
Sex-related differences in the postmolt distribution of Weddell seals ( Leptonychotes weddellii ) in the southern Weddell Sea
复制标题
威德尔海南部威德尔海豹 ( Leptonychotes weddellii ) 蜕皮后分布的性别相关差异
DOI：
10.1111/mms.12461
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发表时间：
2017
影响因子：
2.3
通讯作者：
Langley I
中科院分区：
文献类型：
--
作者：
Langley I
威德尔海南部的威德尔海豹（Leptonychotes weddellii）种群处于大陆架边缘的独特位置，南部为广阔的陆架沃茨，北部为深南大洋。我们描述了这个种群冬季分布的性别相关差异，来自2011年2月在年度蜕皮结束时部署的20个电导率-温度-深度卫星中继数据记录仪收集的数据。计算区域每日速度，并使用状态空间模型来估计行为状态到沿着个人轨迹的位置。据GLSTE估计，男性和较小的个体在较浅的水域潜水，每天的部署距离较短（男性14.6 ± 2.26 km/d，女性18.9 ± 2.42 km/d），男性估计在较浅的水域潜水（男性604 ± 382 m，女性1，875 ± 1，458 m）。男性和较小的个体也被估计为更多的居民;男性平均花费83.4% ± 7.7%的时间在居民行为状态中，而女性为74.1% ± 7.1%。威德尔海南部的雄性和雌性威德尔海豹采取不同策略的证据在其他沿着极地分布的地方还没有显示出来。
The population of Weddell seals (Leptonychotes weddellii) in the southern Weddell Sea is in a unique position on the continental shelf edge, with vast shelf waters to the south, and deep Southern Ocean to the north. We describe sex‐related differences in the winter distribution of this population, from data collected by 20 conductivity‐temperature‐depth satellite relay data loggers deployed in February 2011 at the end of the annual molt. The regional daily speed was calculated, and a state‐space model was used to estimate behavioral states to positions along individuals’ tracks. GLMMs estimated that males and smaller individuals, diving in shallower water, traveled less far per day of deployment (males 14.6 ± 2.26 km/d, females 18.9 ± 2.42 km/d), and males were estimated to dive in shallower water (males 604 ± 382 m, females 1,875 ± 1,458 m). Males and smaller individuals were also estimated to be more resident; males spent an average 83.4% ± 7.7% of their time in a resident behavioral state, compared to females at 74.1% ± 7.1%. This evidence that male and female Weddell seals in the southern Weddell Sea are adopting different strategies has not been shown elsewhere along their circumpolar distribution.