Stability in The Proportion of Harbor Seals Hauled Out Under Locally Ideal Conditions
We monitored the haul-out behavior of 68 radio-tagged harbor seals (Phoca vitulina) during the molt season at two Alaskan haul-out sites (Grand Island, August-September 1994; Nanvak Bay, August-September 2000). For each site, we created a statistical model of the proportion of seals hauled out as a...
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ftunivnebraskali:oai:digitalcommons.unl.edu:usdeptcommercepub-1151 2023-11-12T04:24:39+01:00 Stability in The Proportion of Harbor Seals Hauled Out Under Locally Ideal Conditions Simpkins, Michael Withrow, David Cesarone, Jack Boveng, Peter 2003-10-01T07:00:00Z application/pdf https://digitalcommons.unl.edu/usdeptcommercepub/145 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1151/viewcontent/Boveng_MMS_2003_Stability_in_proportion.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/usdeptcommercepub/145 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1151/viewcontent/Boveng_MMS_2003_Stability_in_proportion.pdf Publications, Agencies and Staff of the U.S. Department of Commerce Environmental Sciences text 2003 ftunivnebraskali 2023-10-30T10:43:04Z We monitored the haul-out behavior of 68 radio-tagged harbor seals (Phoca vitulina) during the molt season at two Alaskan haul-out sites (Grand Island, August-September 1994; Nanvak Bay, August-September 2000). For each site, we created a statistical model of the proportion of seals hauled out as a function of date, time of day, tide, and weather covariates. Using these models, we identified the conditions that would result in the greatest proportion of seals hauled out. Although those “ideal conditions” differed between sites, the proportion of seals predicted to be hauled out under those conditions was very similar (81.3% for Grand Island and 85.7% for Nanvak Bay). The similar estimates for both sites suggest that haul-out proportions under locally ideal conditions may be constant between years and geographic regions, at least during the molt season. Text Phoca vitulina University of Nebraska-Lincoln: DigitalCommons@UNL Grand Island ENVELOPE(-112.602,-112.602,56.334,56.334) |
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Open Polar |
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University of Nebraska-Lincoln: DigitalCommons@UNL |
op_collection_id |
ftunivnebraskali |
language |
unknown |
topic |
Environmental Sciences |
spellingShingle |
Environmental Sciences Simpkins, Michael Withrow, David Cesarone, Jack Boveng, Peter Stability in The Proportion of Harbor Seals Hauled Out Under Locally Ideal Conditions |
topic_facet |
Environmental Sciences |
description |
We monitored the haul-out behavior of 68 radio-tagged harbor seals (Phoca vitulina) during the molt season at two Alaskan haul-out sites (Grand Island, August-September 1994; Nanvak Bay, August-September 2000). For each site, we created a statistical model of the proportion of seals hauled out as a function of date, time of day, tide, and weather covariates. Using these models, we identified the conditions that would result in the greatest proportion of seals hauled out. Although those “ideal conditions” differed between sites, the proportion of seals predicted to be hauled out under those conditions was very similar (81.3% for Grand Island and 85.7% for Nanvak Bay). The similar estimates for both sites suggest that haul-out proportions under locally ideal conditions may be constant between years and geographic regions, at least during the molt season. |
format |
Text |
author |
Simpkins, Michael Withrow, David Cesarone, Jack Boveng, Peter |
author_facet |
Simpkins, Michael Withrow, David Cesarone, Jack Boveng, Peter |
author_sort |
Simpkins, Michael |
title |
Stability in The Proportion of Harbor Seals Hauled Out Under Locally Ideal Conditions |
title_short |
Stability in The Proportion of Harbor Seals Hauled Out Under Locally Ideal Conditions |
title_full |
Stability in The Proportion of Harbor Seals Hauled Out Under Locally Ideal Conditions |
title_fullStr |
Stability in The Proportion of Harbor Seals Hauled Out Under Locally Ideal Conditions |
title_full_unstemmed |
Stability in The Proportion of Harbor Seals Hauled Out Under Locally Ideal Conditions |
title_sort |
stability in the proportion of harbor seals hauled out under locally ideal conditions |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2003 |
url |
https://digitalcommons.unl.edu/usdeptcommercepub/145 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1151/viewcontent/Boveng_MMS_2003_Stability_in_proportion.pdf |
long_lat |
ENVELOPE(-112.602,-112.602,56.334,56.334) |
geographic |
Grand Island |
geographic_facet |
Grand Island |
genre |
Phoca vitulina |
genre_facet |
Phoca vitulina |
op_source |
Publications, Agencies and Staff of the U.S. Department of Commerce |
op_relation |
https://digitalcommons.unl.edu/usdeptcommercepub/145 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1151/viewcontent/Boveng_MMS_2003_Stability_in_proportion.pdf |
_version_ |
1782339137356955648 |