Group characteristics, site fidelity, and photo‐identification of harbor porpoises, Phocoena phocoena, in Burrows Pass, Fidalgo Island, Washington
Abstract Little is known about harbor porpoises at the individual level or local group structure. Group characteristics, site fidelity, and photo‐identification of harbor porpoises were investigated off Fidalgo Island, Washington State. Harbor porpoise presence was affected by season and rip tide st...
Published in: | Marine Mammal Science |
---|---|
Main Authors: | , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2017
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/mms.12459 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmms.12459 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12459 |
id |
crwiley:10.1111/mms.12459 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/mms.12459 2024-06-23T07:56:12+00:00 Group characteristics, site fidelity, and photo‐identification of harbor porpoises, Phocoena phocoena, in Burrows Pass, Fidalgo Island, Washington Elliser, Cindy R. MacIver, Katrina H. Green, Michelle Orange County Community Foundation 2017 http://dx.doi.org/10.1111/mms.12459 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmms.12459 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12459 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 34, issue 2, page 365-384 ISSN 0824-0469 1748-7692 journal-article 2017 crwiley https://doi.org/10.1111/mms.12459 2024-06-06T04:22:58Z Abstract Little is known about harbor porpoises at the individual level or local group structure. Group characteristics, site fidelity, and photo‐identification of harbor porpoises were investigated off Fidalgo Island, Washington State. Harbor porpoise presence was affected by season and rip tide strength (Wald χ 2 P < 0.04); calf presence was influenced by season and tide (Wald χ 2 P < 0.0075). Average group size (2.32 ± 1.38, n = 266) was influenced by season, behavior, and calf presence ( F 7 = 9.71, P < 0.0001, R 2 = 0.294). Fifty‐three individuals were identified using a matrix of primary, secondary, and confirmation markings that were stable over months/years. Over 35% were resighted in more than 1 mo (range 1–7, = 1.83); 15.1% were seen in more than 1 yr, suggesting some level of residency. Despite having higher effort, presence and group size were significantly lower in Summer. Variations in the significance of rip tide strength and tides relate to calf presence and support other findings that harbor porpoise population structure is complex and varies at small spatiotemporal scales and may also vary between populations and habitats. This study identifies variables affecting group characteristics and emphasizes the importance of research on local populations of harbor porpoises. Article in Journal/Newspaper Phocoena phocoena Wiley Online Library Burrows ENVELOPE(163.650,163.650,-74.300,-74.300) Marine Mammal Science 34 2 365 384 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Little is known about harbor porpoises at the individual level or local group structure. Group characteristics, site fidelity, and photo‐identification of harbor porpoises were investigated off Fidalgo Island, Washington State. Harbor porpoise presence was affected by season and rip tide strength (Wald χ 2 P < 0.04); calf presence was influenced by season and tide (Wald χ 2 P < 0.0075). Average group size (2.32 ± 1.38, n = 266) was influenced by season, behavior, and calf presence ( F 7 = 9.71, P < 0.0001, R 2 = 0.294). Fifty‐three individuals were identified using a matrix of primary, secondary, and confirmation markings that were stable over months/years. Over 35% were resighted in more than 1 mo (range 1–7, = 1.83); 15.1% were seen in more than 1 yr, suggesting some level of residency. Despite having higher effort, presence and group size were significantly lower in Summer. Variations in the significance of rip tide strength and tides relate to calf presence and support other findings that harbor porpoise population structure is complex and varies at small spatiotemporal scales and may also vary between populations and habitats. This study identifies variables affecting group characteristics and emphasizes the importance of research on local populations of harbor porpoises. |
author2 |
Orange County Community Foundation |
format |
Article in Journal/Newspaper |
author |
Elliser, Cindy R. MacIver, Katrina H. Green, Michelle |
spellingShingle |
Elliser, Cindy R. MacIver, Katrina H. Green, Michelle Group characteristics, site fidelity, and photo‐identification of harbor porpoises, Phocoena phocoena, in Burrows Pass, Fidalgo Island, Washington |
author_facet |
Elliser, Cindy R. MacIver, Katrina H. Green, Michelle |
author_sort |
Elliser, Cindy R. |
title |
Group characteristics, site fidelity, and photo‐identification of harbor porpoises, Phocoena phocoena, in Burrows Pass, Fidalgo Island, Washington |
title_short |
Group characteristics, site fidelity, and photo‐identification of harbor porpoises, Phocoena phocoena, in Burrows Pass, Fidalgo Island, Washington |
title_full |
Group characteristics, site fidelity, and photo‐identification of harbor porpoises, Phocoena phocoena, in Burrows Pass, Fidalgo Island, Washington |
title_fullStr |
Group characteristics, site fidelity, and photo‐identification of harbor porpoises, Phocoena phocoena, in Burrows Pass, Fidalgo Island, Washington |
title_full_unstemmed |
Group characteristics, site fidelity, and photo‐identification of harbor porpoises, Phocoena phocoena, in Burrows Pass, Fidalgo Island, Washington |
title_sort |
group characteristics, site fidelity, and photo‐identification of harbor porpoises, phocoena phocoena, in burrows pass, fidalgo island, washington |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1111/mms.12459 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmms.12459 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12459 |
long_lat |
ENVELOPE(163.650,163.650,-74.300,-74.300) |
geographic |
Burrows |
geographic_facet |
Burrows |
genre |
Phocoena phocoena |
genre_facet |
Phocoena phocoena |
op_source |
Marine Mammal Science volume 34, issue 2, page 365-384 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/mms.12459 |
container_title |
Marine Mammal Science |
container_volume |
34 |
container_issue |
2 |
container_start_page |
365 |
op_container_end_page |
384 |
_version_ |
1802649139298697216 |