期刊
JOURNAL OF MAMMALOGY
卷 101, 期 1, 页码 121-128出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/jmammal/gyz184
关键词
conservation; generalized linear models; Halichoerus grypus; population recovery; rates of increase; recolonization
类别
资金
- National Marine Fisheries Service-Northeast Fisheries Science Center (NMFS-NEFSC)
- National Marine Fisheries Service-Sea Grant (NMFS-SG) Fellowship
- National Oceanographic and Atmospheric Administration (NOAA) Office of Science and Technology
Gray seals were historically distributed along the northeastern coast of the United States, but bounties and lack of protection reduced numbers and they were rarely observed for most of the 20th century. Once protections were enacted, the population started to rebound. Here, we describe the recolonization and recovery of gray seals in the United States, focusing on the re-establishment of pupping sites. We fit individual generalized linear models to various time series (1988-2019) to estimate rates of increase in observed pup counts at four of the more data-rich sites. Annual rate of increase at individual sites ranged from -0.2% (95% CI: -2.3-1.9%) to 26.3% (95% CI: 21.6-31.4%). The increase in sites and number of pups born in the United States is driven by population growth and immigration from Canadian colonies and is part of a larger recovery of the Northwest Atlantic population. Wildlife protection, a healthy source population, habitat availability, and species traits that allow for dispersal and high productivity were all important factors in this recovery.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据