Possible Linkages Between Ecosystem Measures and the Demographics of a Weddell Seal Population

9420818 Siniff威德尔海豹是一种重要的高营养级物种， 由于它靠近南极支助设施，一直是长期研究的重点。 最广泛的调查涉及麦默多站的威德尔海豹种群，那里的研究和监测工作始于20世纪60年代初，并从那时起一直持续下去。 该项目的目标是：1）通过完成对出生于麦克默多健全种群的所有幼崽进行标记所需的实地工作，继续进行长期标记研究，并更换先前标记的个体上的标记，以便它们不会从标记种群中丢失; 2）每年更新人口参数估计数，并继续分析和检验与这一数据库有关的假设。 为了支持这些分析，我们将进行标记-再捕获调查，这是获得当前捕获-再捕获模型所需的所有估计所必需的。

9420818 Siniff The Weddell seal is an important upper trophic level species that has been the focus of long-term studies because of its proximity to Antarctic support facilities. The most extensive investigations have involved the Weddell seal population at McMurdo Station where research and monitoring efforts began in the early 1960s and have continued since that date. The objectives of this project are 1) to continue the long-term tagging studies by completing the field work necessary to tag all pups born into the McMurdo sound population and to replace tags on previously tagged individuals so they will not be lost from the tagged population and 2) to update estimates of population parameters annually and to continue the analyses and test of hypotheses associated with this data base. In support of these analyses we will carry out mark-recapture surveys that are necessary to obtain all the estimates required for current capture-recapture models.