Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches
Abstract Laidre, K. L., Heagerty, P. J., Heide-Jørgensen, M. P., Witting, L., and Simon, M. 2009. Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches. – ICES Journal of Marine Science, 66: 2253–2266. Th...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsp191 http://academic.oup.com/icesjms/article-pdf/66/10/2253/29135448/fsp191.pdf |
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croxfordunivpr:10.1093/icesjms/fsp191 2024-06-23T07:51:31+00:00 Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches Laidre, Kristin L. Heagerty, Patrick J. Heide-Jørgensen, Mads Peter Witting, Lars Simon, Malene 2009 http://dx.doi.org/10.1093/icesjms/fsp191 http://academic.oup.com/icesjms/article-pdf/66/10/2253/29135448/fsp191.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 66, issue 10, page 2253-2266 ISSN 1095-9289 1054-3139 journal-article 2009 croxfordunivpr https://doi.org/10.1093/icesjms/fsp191 2024-06-04T06:15:26Z Abstract Laidre, K. L., Heagerty, P. J., Heide-Jørgensen, M. P., Witting, L., and Simon, M. 2009. Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches. – ICES Journal of Marine Science, 66: 2253–2266. The harvest of common minke whales (Balaenoptera acutorostrata) in West Greenland has historically been skewed towards female whales, yet a complete analysis of spatial and temporal patterns of catch sex ratio has never been conducted. We examined trends in the sex ratio of catches over time, season, space, and relative to sea temperature using 2400 records from inshore Greenland subsistence whaling operations (1960–2006) and 2072 records from offshore Norwegian commercial operations (1968–1985). Logistic regression models were developed to examine the trend in sex ratio in three regions (Northwest, NW; Central West, CW; Southwest, SW) and by latitude. The highly skewed proportion of females in all catches was strongly positively correlated (r2 = 0.8) with latitude in the offshore catches (>100 km). Generalized linear models of inshore catches indicated slightly increasing though non-significant trends in the proportion of females taken off CW and NW Greenland and a significant declining trend off SW Greenland. Sensitivity analyses show that the declining inshore SW trend was entirely accounted for by the past 5 years (2002–2006) of data. Models containing both year and temperature interactions suggested that either parameter provided an equivalent explanation of the variation in trends across regions. Article in Journal/Newspaper Balaenoptera acutorostrata Greenland Oxford University Press Greenland ICES Journal of Marine Science 66 10 2253 2266 |
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Oxford University Press |
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croxfordunivpr |
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English |
description |
Abstract Laidre, K. L., Heagerty, P. J., Heide-Jørgensen, M. P., Witting, L., and Simon, M. 2009. Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches. – ICES Journal of Marine Science, 66: 2253–2266. The harvest of common minke whales (Balaenoptera acutorostrata) in West Greenland has historically been skewed towards female whales, yet a complete analysis of spatial and temporal patterns of catch sex ratio has never been conducted. We examined trends in the sex ratio of catches over time, season, space, and relative to sea temperature using 2400 records from inshore Greenland subsistence whaling operations (1960–2006) and 2072 records from offshore Norwegian commercial operations (1968–1985). Logistic regression models were developed to examine the trend in sex ratio in three regions (Northwest, NW; Central West, CW; Southwest, SW) and by latitude. The highly skewed proportion of females in all catches was strongly positively correlated (r2 = 0.8) with latitude in the offshore catches (>100 km). Generalized linear models of inshore catches indicated slightly increasing though non-significant trends in the proportion of females taken off CW and NW Greenland and a significant declining trend off SW Greenland. Sensitivity analyses show that the declining inshore SW trend was entirely accounted for by the past 5 years (2002–2006) of data. Models containing both year and temperature interactions suggested that either parameter provided an equivalent explanation of the variation in trends across regions. |
format |
Article in Journal/Newspaper |
author |
Laidre, Kristin L. Heagerty, Patrick J. Heide-Jørgensen, Mads Peter Witting, Lars Simon, Malene |
spellingShingle |
Laidre, Kristin L. Heagerty, Patrick J. Heide-Jørgensen, Mads Peter Witting, Lars Simon, Malene Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches |
author_facet |
Laidre, Kristin L. Heagerty, Patrick J. Heide-Jørgensen, Mads Peter Witting, Lars Simon, Malene |
author_sort |
Laidre, Kristin L. |
title |
Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches |
title_short |
Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches |
title_full |
Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches |
title_fullStr |
Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches |
title_full_unstemmed |
Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches |
title_sort |
sexual segregation of common minke whales (balaenoptera acutorostrata) in greenland, and the influence of sea temperature on the sex ratio of catches |
publisher |
Oxford University Press (OUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1093/icesjms/fsp191 http://academic.oup.com/icesjms/article-pdf/66/10/2253/29135448/fsp191.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Balaenoptera acutorostrata Greenland |
genre_facet |
Balaenoptera acutorostrata Greenland |
op_source |
ICES Journal of Marine Science volume 66, issue 10, page 2253-2266 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsp191 |
container_title |
ICES Journal of Marine Science |
container_volume |
66 |
container_issue |
10 |
container_start_page |
2253 |
op_container_end_page |
2266 |
_version_ |
1802642628107304960 |