Using aerial photography to investigate evidence of feeding by bowhead whales
Abstract Aerial photographs were analyzed to investigate the feeding habits of the Bering‐Chukchi‐Beaufort (BCB) population of bowhead whales ( Balaena mysticetus ), particularly epibenthic feeding near Barrow, Alaska. Evidence of epibenthic feeding was based on mud visible on the dorsal surface of...
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crwiley:10.1111/j.1748-7692.2011.00518.x 2023-12-03T10:19:54+01:00 Using aerial photography to investigate evidence of feeding by bowhead whales Mocklin, Julie A. Rugh, David J. Moore, Sue E. Angliss, Robyn P. 2011 http://dx.doi.org/10.1111/j.1748-7692.2011.00518.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.2011.00518.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.2011.00518.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 28, issue 3, page 602-619 ISSN 0824-0469 1748-7692 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2011 crwiley https://doi.org/10.1111/j.1748-7692.2011.00518.x 2023-11-09T14:17:59Z Abstract Aerial photographs were analyzed to investigate the feeding habits of the Bering‐Chukchi‐Beaufort (BCB) population of bowhead whales ( Balaena mysticetus ), particularly epibenthic feeding near Barrow, Alaska. Evidence of epibenthic feeding was based on mud visible on the dorsal surface of whales, resulting from feeding near the seafloor. Other cues used to assess feeding were an open mouth or the presence of feces in photographs. Over 3,600 photographs were analyzed including photos from surveys in spring and late summer and in both the western and eastern Beaufort Sea. Of all the photographs analyzed, 64% were scored as definitively muddy. In spring, ratios ranged from a low of 27% in 2003 to a high of 76% in 2004. When all May sample sets off Barrow were combined (1985, 1986, 2003, 2004), there was a significant difference ( t ‐test, P < 0.004) between the proportion of muddy juveniles to the proportion of muddy adults, with muddy adults being more common. The Barrow area was a commonly used feeding ground during migrations in both the spring (61% of the sample were feeding; 55% epibenthically) and autumn (99% of the sample; 97% epibenthically). Bowheads both migrate and feed through areas where petroleum extraction is underway and anticipated; hence, exposure to oil after a spill is of considerable concern to Native communities and management agencies. Article in Journal/Newspaper Balaena mysticetus Barrow Beaufort Sea Chukchi Alaska Wiley Online Library (via Crossref) Marine Mammal Science 28 3 602 619 |
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Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Mocklin, Julie A. Rugh, David J. Moore, Sue E. Angliss, Robyn P. Using aerial photography to investigate evidence of feeding by bowhead whales |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract Aerial photographs were analyzed to investigate the feeding habits of the Bering‐Chukchi‐Beaufort (BCB) population of bowhead whales ( Balaena mysticetus ), particularly epibenthic feeding near Barrow, Alaska. Evidence of epibenthic feeding was based on mud visible on the dorsal surface of whales, resulting from feeding near the seafloor. Other cues used to assess feeding were an open mouth or the presence of feces in photographs. Over 3,600 photographs were analyzed including photos from surveys in spring and late summer and in both the western and eastern Beaufort Sea. Of all the photographs analyzed, 64% were scored as definitively muddy. In spring, ratios ranged from a low of 27% in 2003 to a high of 76% in 2004. When all May sample sets off Barrow were combined (1985, 1986, 2003, 2004), there was a significant difference ( t ‐test, P < 0.004) between the proportion of muddy juveniles to the proportion of muddy adults, with muddy adults being more common. The Barrow area was a commonly used feeding ground during migrations in both the spring (61% of the sample were feeding; 55% epibenthically) and autumn (99% of the sample; 97% epibenthically). Bowheads both migrate and feed through areas where petroleum extraction is underway and anticipated; hence, exposure to oil after a spill is of considerable concern to Native communities and management agencies. |
format |
Article in Journal/Newspaper |
author |
Mocklin, Julie A. Rugh, David J. Moore, Sue E. Angliss, Robyn P. |
author_facet |
Mocklin, Julie A. Rugh, David J. Moore, Sue E. Angliss, Robyn P. |
author_sort |
Mocklin, Julie A. |
title |
Using aerial photography to investigate evidence of feeding by bowhead whales |
title_short |
Using aerial photography to investigate evidence of feeding by bowhead whales |
title_full |
Using aerial photography to investigate evidence of feeding by bowhead whales |
title_fullStr |
Using aerial photography to investigate evidence of feeding by bowhead whales |
title_full_unstemmed |
Using aerial photography to investigate evidence of feeding by bowhead whales |
title_sort |
using aerial photography to investigate evidence of feeding by bowhead whales |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1111/j.1748-7692.2011.00518.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.2011.00518.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.2011.00518.x |
genre |
Balaena mysticetus Barrow Beaufort Sea Chukchi Alaska |
genre_facet |
Balaena mysticetus Barrow Beaufort Sea Chukchi Alaska |
op_source |
Marine Mammal Science volume 28, issue 3, page 602-619 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1748-7692.2011.00518.x |
container_title |
Marine Mammal Science |
container_volume |
28 |
container_issue |
3 |
container_start_page |
602 |
op_container_end_page |
619 |
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1784267309312901120 |