Body condition changes arising from natural factors and fishing gear entanglements in North Atlantic right whales Eubalaena glacialis
Body condition has been correlated with survival and reproductive success in both terrestrial and marine mammals, including North Atlantic right whales Eubalaena glacialis. We used photographs of individually identified right whales to assess visual changes in body condition in reproductive females,...
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ftdoajarticles:oai:doaj.org/article:7701b7bad6b5483ba6e6ce8fcd6afa3a 2023-05-15T16:08:16+02:00 Body condition changes arising from natural factors and fishing gear entanglements in North Atlantic right whales Eubalaena glacialis Pettis, HM Rolland, RM Hamilton, PK Knowlton, AR Burgess, EA Kraus, SD 2017-03-01T00:00:00Z https://doi.org/10.3354/esr00800 https://doaj.org/article/7701b7bad6b5483ba6e6ce8fcd6afa3a EN eng Inter-Research https://www.int-res.com/abstracts/esr/v32/p237-249/ https://doaj.org/toc/1863-5407 https://doaj.org/toc/1613-4796 1863-5407 1613-4796 doi:10.3354/esr00800 https://doaj.org/article/7701b7bad6b5483ba6e6ce8fcd6afa3a Endangered Species Research, Vol 32, Pp 237-249 (2017) Zoology QL1-991 Botany QK1-989 article 2017 ftdoajarticles https://doi.org/10.3354/esr00800 2022-12-31T03:57:30Z Body condition has been correlated with survival and reproductive success in both terrestrial and marine mammals, including North Atlantic right whales Eubalaena glacialis. We used photographs of individually identified right whales to assess visual changes in body condition in reproductive females, adult males, juveniles, and entangled whales. Images from sightings of individual whales were grouped sequentially by habitat region, and each group of images was assigned a body condition score of good, fair, or poor based on the dorsal profile posterior to the blowholes. Temporally consecutive groups of images (n = 1496) of 340 individual whales were compared to investigate the frequency, direction, and minimum timeframe between changes in body condition. Changes in body condition scores of right whales were significantly influenced by group category. Lactating females and severely entangled right whales were more likely to exhibit declining body condition than other groups. Resting females were significantly more likely to improve in condition than other groups but exhibited the longest timeframe for improving condition. Young juveniles were less likely to improve in condition compared to adult males, but remained in compromised condition less frequently than older juveniles and adult males. The shortest timeframes between changing body condition scores were 11 d for declining condition and 12 d for improving condition. This study demonstrates that photographic analysis can detect rapid body condition changes and identifies groups of right whales that are particularly vulnerable to declining condition and delayed recovery from energetically taxing events. Article in Journal/Newspaper Eubalaena glacialis North Atlantic Directory of Open Access Journals: DOAJ Articles Endangered Species Research 32 237 249 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Zoology QL1-991 Botany QK1-989 |
spellingShingle |
Zoology QL1-991 Botany QK1-989 Pettis, HM Rolland, RM Hamilton, PK Knowlton, AR Burgess, EA Kraus, SD Body condition changes arising from natural factors and fishing gear entanglements in North Atlantic right whales Eubalaena glacialis |
topic_facet |
Zoology QL1-991 Botany QK1-989 |
description |
Body condition has been correlated with survival and reproductive success in both terrestrial and marine mammals, including North Atlantic right whales Eubalaena glacialis. We used photographs of individually identified right whales to assess visual changes in body condition in reproductive females, adult males, juveniles, and entangled whales. Images from sightings of individual whales were grouped sequentially by habitat region, and each group of images was assigned a body condition score of good, fair, or poor based on the dorsal profile posterior to the blowholes. Temporally consecutive groups of images (n = 1496) of 340 individual whales were compared to investigate the frequency, direction, and minimum timeframe between changes in body condition. Changes in body condition scores of right whales were significantly influenced by group category. Lactating females and severely entangled right whales were more likely to exhibit declining body condition than other groups. Resting females were significantly more likely to improve in condition than other groups but exhibited the longest timeframe for improving condition. Young juveniles were less likely to improve in condition compared to adult males, but remained in compromised condition less frequently than older juveniles and adult males. The shortest timeframes between changing body condition scores were 11 d for declining condition and 12 d for improving condition. This study demonstrates that photographic analysis can detect rapid body condition changes and identifies groups of right whales that are particularly vulnerable to declining condition and delayed recovery from energetically taxing events. |
format |
Article in Journal/Newspaper |
author |
Pettis, HM Rolland, RM Hamilton, PK Knowlton, AR Burgess, EA Kraus, SD |
author_facet |
Pettis, HM Rolland, RM Hamilton, PK Knowlton, AR Burgess, EA Kraus, SD |
author_sort |
Pettis, HM |
title |
Body condition changes arising from natural factors and fishing gear entanglements in North Atlantic right whales Eubalaena glacialis |
title_short |
Body condition changes arising from natural factors and fishing gear entanglements in North Atlantic right whales Eubalaena glacialis |
title_full |
Body condition changes arising from natural factors and fishing gear entanglements in North Atlantic right whales Eubalaena glacialis |
title_fullStr |
Body condition changes arising from natural factors and fishing gear entanglements in North Atlantic right whales Eubalaena glacialis |
title_full_unstemmed |
Body condition changes arising from natural factors and fishing gear entanglements in North Atlantic right whales Eubalaena glacialis |
title_sort |
body condition changes arising from natural factors and fishing gear entanglements in north atlantic right whales eubalaena glacialis |
publisher |
Inter-Research |
publishDate |
2017 |
url |
https://doi.org/10.3354/esr00800 https://doaj.org/article/7701b7bad6b5483ba6e6ce8fcd6afa3a |
genre |
Eubalaena glacialis North Atlantic |
genre_facet |
Eubalaena glacialis North Atlantic |
op_source |
Endangered Species Research, Vol 32, Pp 237-249 (2017) |
op_relation |
https://www.int-res.com/abstracts/esr/v32/p237-249/ https://doaj.org/toc/1863-5407 https://doaj.org/toc/1613-4796 1863-5407 1613-4796 doi:10.3354/esr00800 https://doaj.org/article/7701b7bad6b5483ba6e6ce8fcd6afa3a |
op_doi |
https://doi.org/10.3354/esr00800 |
container_title |
Endangered Species Research |
container_volume |
32 |
container_start_page |
237 |
op_container_end_page |
249 |
_version_ |
1766404333478346752 |