Resightings of humpback whales in Hawaiian waters over spans of 10-32 years: Site fidelity, sex ratios, calving rates, female demographics, and the dynamics of social and behavioral roles of individuals
From a database of approximately 5,000 Hawaiian humpback whales identified photographically between 1976 and 2010, we extracted 71 males and 39 females having resighting spans of 10 or more years, from first to most recent sighting. Findings included: (1) the male-biased sex ratio was like that foun...
Published in: | Marine Mammal Science |
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Online Access: | https://doi.org/10.1111/j.1748-7692.2010.00441.x http://researchrepository.napier.ac.uk/Output/1007867 |
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ftnapieruniv:oai:repository@napier.ac.uk:1007867 2023-05-15T16:36:07+02:00 Resightings of humpback whales in Hawaiian waters over spans of 10-32 years: Site fidelity, sex ratios, calving rates, female demographics, and the dynamics of social and behavioral roles of individuals Herman, Louis M. Pack, Adam A. Rose, Kathryn Craig, Alison Herman, Elia Y. K. Hakala, Siri Milette, Aliza 2010-12-29 https://doi.org/10.1111/j.1748-7692.2010.00441.x http://researchrepository.napier.ac.uk/Output/1007867 unknown Wiley http://researchrepository.napier.ac.uk/Output/1007867 doi:https://doi.org/10.1111/j.1748-7692.2010.00441.x 0824-0469 10.1111/j.1748-7692.2010.00441.x humpback whale Megaptera novaeangliae site fidelity breeding grounds feeding grounds photographic identification calving rates sex?biased distributions social roles 591.5 Behaviour QH301 Biology Animal Behaviour Biodiversity and conservation Ecology Marine and Freshwater Biology Animal and Plant Science Research Group Culture and Communities Journal Article 2010 ftnapieruniv https://doi.org/10.1111/j.1748-7692.2010.00441.x 2022-10-13T22:42:09Z From a database of approximately 5,000 Hawaiian humpback whales identified photographically between 1976 and 2010, we extracted 71 males and 39 females having resighting spans of 10 or more years, from first to most recent sighting. Findings included: (1) the male-biased sex ratio was like that found in breeding grounds worldwide; (2) the mean span for males of 20.7 yr (maximum = 32 yr) did not differ significantly from the mean of 19.8 yr (maximum=29 yr) for females, but males were seen in significantly more years during their spans than were females; (3) the mean number of females seen with and without calf across 11 three-year intervals from 1977 to 2009 did not differ significantly; (4) the calving rate for the 39 females was 0.48 and seven females produced two to eight calves over spans of 22–26 yr; (5) females attracted significantly more escorts in years without calfthan in years with calf; (6) individuals showed great diversity in the social units they occupied over their sighting spans, but with the most frequently observed unit for both sexes being the trio of mother, calf, and escort. Males were also observed frequently in competitive groups centered about a female without calf. Article in Journal/Newspaper Humpback Whale Megaptera novaeangliae Edinburgh Napier Repository (Napier University Edinburgh) Marine Mammal Science 27 4 736 768 |
institution |
Open Polar |
collection |
Edinburgh Napier Repository (Napier University Edinburgh) |
op_collection_id |
ftnapieruniv |
language |
unknown |
topic |
humpback whale Megaptera novaeangliae site fidelity breeding grounds feeding grounds photographic identification calving rates sex?biased distributions social roles 591.5 Behaviour QH301 Biology Animal Behaviour Biodiversity and conservation Ecology Marine and Freshwater Biology Animal and Plant Science Research Group Culture and Communities |
spellingShingle |
humpback whale Megaptera novaeangliae site fidelity breeding grounds feeding grounds photographic identification calving rates sex?biased distributions social roles 591.5 Behaviour QH301 Biology Animal Behaviour Biodiversity and conservation Ecology Marine and Freshwater Biology Animal and Plant Science Research Group Culture and Communities Herman, Louis M. Pack, Adam A. Rose, Kathryn Craig, Alison Herman, Elia Y. K. Hakala, Siri Milette, Aliza Resightings of humpback whales in Hawaiian waters over spans of 10-32 years: Site fidelity, sex ratios, calving rates, female demographics, and the dynamics of social and behavioral roles of individuals |
topic_facet |
humpback whale Megaptera novaeangliae site fidelity breeding grounds feeding grounds photographic identification calving rates sex?biased distributions social roles 591.5 Behaviour QH301 Biology Animal Behaviour Biodiversity and conservation Ecology Marine and Freshwater Biology Animal and Plant Science Research Group Culture and Communities |
description |
From a database of approximately 5,000 Hawaiian humpback whales identified photographically between 1976 and 2010, we extracted 71 males and 39 females having resighting spans of 10 or more years, from first to most recent sighting. Findings included: (1) the male-biased sex ratio was like that found in breeding grounds worldwide; (2) the mean span for males of 20.7 yr (maximum = 32 yr) did not differ significantly from the mean of 19.8 yr (maximum=29 yr) for females, but males were seen in significantly more years during their spans than were females; (3) the mean number of females seen with and without calf across 11 three-year intervals from 1977 to 2009 did not differ significantly; (4) the calving rate for the 39 females was 0.48 and seven females produced two to eight calves over spans of 22–26 yr; (5) females attracted significantly more escorts in years without calfthan in years with calf; (6) individuals showed great diversity in the social units they occupied over their sighting spans, but with the most frequently observed unit for both sexes being the trio of mother, calf, and escort. Males were also observed frequently in competitive groups centered about a female without calf. |
format |
Article in Journal/Newspaper |
author |
Herman, Louis M. Pack, Adam A. Rose, Kathryn Craig, Alison Herman, Elia Y. K. Hakala, Siri Milette, Aliza |
author_facet |
Herman, Louis M. Pack, Adam A. Rose, Kathryn Craig, Alison Herman, Elia Y. K. Hakala, Siri Milette, Aliza |
author_sort |
Herman, Louis M. |
title |
Resightings of humpback whales in Hawaiian waters over spans of 10-32 years: Site fidelity, sex ratios, calving rates, female demographics, and the dynamics of social and behavioral roles of individuals |
title_short |
Resightings of humpback whales in Hawaiian waters over spans of 10-32 years: Site fidelity, sex ratios, calving rates, female demographics, and the dynamics of social and behavioral roles of individuals |
title_full |
Resightings of humpback whales in Hawaiian waters over spans of 10-32 years: Site fidelity, sex ratios, calving rates, female demographics, and the dynamics of social and behavioral roles of individuals |
title_fullStr |
Resightings of humpback whales in Hawaiian waters over spans of 10-32 years: Site fidelity, sex ratios, calving rates, female demographics, and the dynamics of social and behavioral roles of individuals |
title_full_unstemmed |
Resightings of humpback whales in Hawaiian waters over spans of 10-32 years: Site fidelity, sex ratios, calving rates, female demographics, and the dynamics of social and behavioral roles of individuals |
title_sort |
resightings of humpback whales in hawaiian waters over spans of 10-32 years: site fidelity, sex ratios, calving rates, female demographics, and the dynamics of social and behavioral roles of individuals |
publisher |
Wiley |
publishDate |
2010 |
url |
https://doi.org/10.1111/j.1748-7692.2010.00441.x http://researchrepository.napier.ac.uk/Output/1007867 |
genre |
Humpback Whale Megaptera novaeangliae |
genre_facet |
Humpback Whale Megaptera novaeangliae |
op_relation |
http://researchrepository.napier.ac.uk/Output/1007867 doi:https://doi.org/10.1111/j.1748-7692.2010.00441.x 0824-0469 10.1111/j.1748-7692.2010.00441.x |
op_doi |
https://doi.org/10.1111/j.1748-7692.2010.00441.x |
container_title |
Marine Mammal Science |
container_volume |
27 |
container_issue |
4 |
container_start_page |
736 |
op_container_end_page |
768 |
_version_ |
1766026427879129088 |