Rates of increase in gray seal (Halichoerus grypus atlantica) pupping at recolonized sites in the United States, 1988–2019
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 recoloni...
Published in: | Journal of Mammalogy |
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American Society of Mammalogists
2019
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Online Access: | https://doi.org/10.1093/jmammal/gyz184 |
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ftbioone:10.1093/jmammal/gyz184 2024-06-02T08:12:15+00:00 Rates of increase in gray seal (Halichoerus grypus atlantica) pupping at recolonized sites in the United States, 1988–2019 Stephanie A. Wood Kimberly T. Murray Elizabeth Josephson James Gilbert Stephanie A. Wood Kimberly T. Murray Elizabeth Josephson James Gilbert world 2019-12-13 text/HTML https://doi.org/10.1093/jmammal/gyz184 en eng American Society of Mammalogists doi:10.1093/jmammal/gyz184 All rights reserved. https://doi.org/10.1093/jmammal/gyz184 Text 2019 ftbioone https://doi.org/10.1093/jmammal/gyz184 2024-05-07T00:55:54Z 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. Text Northwest Atlantic BioOne Online Journals Journal of Mammalogy 101 1 121 128 |
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English |
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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. |
author2 |
Stephanie A. Wood Kimberly T. Murray Elizabeth Josephson James Gilbert |
format |
Text |
author |
Stephanie A. Wood Kimberly T. Murray Elizabeth Josephson James Gilbert |
spellingShingle |
Stephanie A. Wood Kimberly T. Murray Elizabeth Josephson James Gilbert Rates of increase in gray seal (Halichoerus grypus atlantica) pupping at recolonized sites in the United States, 1988–2019 |
author_facet |
Stephanie A. Wood Kimberly T. Murray Elizabeth Josephson James Gilbert |
author_sort |
Stephanie A. Wood |
title |
Rates of increase in gray seal (Halichoerus grypus atlantica) pupping at recolonized sites in the United States, 1988–2019 |
title_short |
Rates of increase in gray seal (Halichoerus grypus atlantica) pupping at recolonized sites in the United States, 1988–2019 |
title_full |
Rates of increase in gray seal (Halichoerus grypus atlantica) pupping at recolonized sites in the United States, 1988–2019 |
title_fullStr |
Rates of increase in gray seal (Halichoerus grypus atlantica) pupping at recolonized sites in the United States, 1988–2019 |
title_full_unstemmed |
Rates of increase in gray seal (Halichoerus grypus atlantica) pupping at recolonized sites in the United States, 1988–2019 |
title_sort |
rates of increase in gray seal (halichoerus grypus atlantica) pupping at recolonized sites in the united states, 1988–2019 |
publisher |
American Society of Mammalogists |
publishDate |
2019 |
url |
https://doi.org/10.1093/jmammal/gyz184 |
op_coverage |
world |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
https://doi.org/10.1093/jmammal/gyz184 |
op_relation |
doi:10.1093/jmammal/gyz184 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1093/jmammal/gyz184 |
container_title |
Journal of Mammalogy |
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101 |
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1 |
container_start_page |
121 |
op_container_end_page |
128 |
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1800758642568331264 |