Space use of Pacific harbor seals (Phoca vitulina richardii) from two haulout locations along the Oregon coast.
Background There are approximately 10,000-12,000 Pacific harbor seals (Phoca vitulina richardii) inhabiting the Oregon coast, and unlike other species of pinnipeds in this region, are reliably present year-round. Despite this, and drastic rebounds in population since the enactment of the Marine Mamm...
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ftdoajarticles:oai:doaj.org/article:abe8e9c7a5e2498e9ad008de243c9646 2023-05-15T17:58:54+02:00 Space use of Pacific harbor seals (Phoca vitulina richardii) from two haulout locations along the Oregon coast. Sheanna Steingass Markus Horning Amanda M Bishop 2019-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0219484 https://doaj.org/article/abe8e9c7a5e2498e9ad008de243c9646 EN eng Public Library of Science (PLoS) https://doi.org/10.1371/journal.pone.0219484 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0219484 https://doaj.org/article/abe8e9c7a5e2498e9ad008de243c9646 PLoS ONE, Vol 14, Iss 7, p e0219484 (2019) Medicine R Science Q article 2019 ftdoajarticles https://doi.org/10.1371/journal.pone.0219484 2022-12-31T09:14:29Z Background There are approximately 10,000-12,000 Pacific harbor seals (Phoca vitulina richardii) inhabiting the Oregon coast, and unlike other species of pinnipeds in this region, are reliably present year-round. Despite this, and drastic rebounds in population since the enactment of the Marine Mammal Protection Act, limited data is available for the present period regarding their space use at sea, and within estuarine, riverine, or bay areas within the state. Objective To examine site-based differences in space use for 24 adult Pacific harbor seals captured and outfitted with satellite transmitters at two predominant haulout sites on the Oregon Coast, USA. Design We captured 24 adult harbor seals from two haulout sites on the Central Oregon coast between September 2014-16 and fitted them with external Wildlife Computers SPOT5 satellite transmitters to track movement. Using state-space modeled locations derived from satellite telemetry data, we evaluated spatial behavior of these animals using a correlated random walk model via R package crawl. Kernel density estimation was subsequently used to calculate home range and core area for each animal. Percent use of open ocean habitat versus use of estuaries, rivers and bays was quantified, as was an initial examination of presence within five newly-established marine reserves in Oregon. Examination of haulout site-related differences in spatial behavior were examined for seals captured in Netarts and Alsea Bays, Oregon and haul out behavior related to time of day, season, and tidal level was also investigated. Results The average individual home range for seals was 364.47 ± 382.87 km2 with seals captured in Alsea bay demonstrating a significantly higher home range area than those captured in Netarts Bay. Alsea bay seals also tended to range farther from shore than Netarts Bay animals. The average calculated core area for seals encompassed on average 29.41 ± 29.23 km2 per animal, however the home range of one animal was so small, core area could not be calculated. Use ... Article in Journal/Newspaper Phoca vitulina Directory of Open Access Journals: DOAJ Articles Pacific PLOS ONE 14 7 e0219484 |
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Medicine R Science Q |
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Medicine R Science Q Sheanna Steingass Markus Horning Amanda M Bishop Space use of Pacific harbor seals (Phoca vitulina richardii) from two haulout locations along the Oregon coast. |
topic_facet |
Medicine R Science Q |
description |
Background There are approximately 10,000-12,000 Pacific harbor seals (Phoca vitulina richardii) inhabiting the Oregon coast, and unlike other species of pinnipeds in this region, are reliably present year-round. Despite this, and drastic rebounds in population since the enactment of the Marine Mammal Protection Act, limited data is available for the present period regarding their space use at sea, and within estuarine, riverine, or bay areas within the state. Objective To examine site-based differences in space use for 24 adult Pacific harbor seals captured and outfitted with satellite transmitters at two predominant haulout sites on the Oregon Coast, USA. Design We captured 24 adult harbor seals from two haulout sites on the Central Oregon coast between September 2014-16 and fitted them with external Wildlife Computers SPOT5 satellite transmitters to track movement. Using state-space modeled locations derived from satellite telemetry data, we evaluated spatial behavior of these animals using a correlated random walk model via R package crawl. Kernel density estimation was subsequently used to calculate home range and core area for each animal. Percent use of open ocean habitat versus use of estuaries, rivers and bays was quantified, as was an initial examination of presence within five newly-established marine reserves in Oregon. Examination of haulout site-related differences in spatial behavior were examined for seals captured in Netarts and Alsea Bays, Oregon and haul out behavior related to time of day, season, and tidal level was also investigated. Results The average individual home range for seals was 364.47 ± 382.87 km2 with seals captured in Alsea bay demonstrating a significantly higher home range area than those captured in Netarts Bay. Alsea bay seals also tended to range farther from shore than Netarts Bay animals. The average calculated core area for seals encompassed on average 29.41 ± 29.23 km2 per animal, however the home range of one animal was so small, core area could not be calculated. Use ... |
format |
Article in Journal/Newspaper |
author |
Sheanna Steingass Markus Horning Amanda M Bishop |
author_facet |
Sheanna Steingass Markus Horning Amanda M Bishop |
author_sort |
Sheanna Steingass |
title |
Space use of Pacific harbor seals (Phoca vitulina richardii) from two haulout locations along the Oregon coast. |
title_short |
Space use of Pacific harbor seals (Phoca vitulina richardii) from two haulout locations along the Oregon coast. |
title_full |
Space use of Pacific harbor seals (Phoca vitulina richardii) from two haulout locations along the Oregon coast. |
title_fullStr |
Space use of Pacific harbor seals (Phoca vitulina richardii) from two haulout locations along the Oregon coast. |
title_full_unstemmed |
Space use of Pacific harbor seals (Phoca vitulina richardii) from two haulout locations along the Oregon coast. |
title_sort |
space use of pacific harbor seals (phoca vitulina richardii) from two haulout locations along the oregon coast. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2019 |
url |
https://doi.org/10.1371/journal.pone.0219484 https://doaj.org/article/abe8e9c7a5e2498e9ad008de243c9646 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Phoca vitulina |
genre_facet |
Phoca vitulina |
op_source |
PLoS ONE, Vol 14, Iss 7, p e0219484 (2019) |
op_relation |
https://doi.org/10.1371/journal.pone.0219484 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0219484 https://doaj.org/article/abe8e9c7a5e2498e9ad008de243c9646 |
op_doi |
https://doi.org/10.1371/journal.pone.0219484 |
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PLOS ONE |
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14 |
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