Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches
<qd> 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...
Published in: | ICES Journal of Marine Science |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | English |
Published: |
Oxford University Press
2009
|
Subjects: | |
Online Access: | http://icesjms.oxfordjournals.org/cgi/content/short/66/10/2253 https://doi.org/10.1093/icesjms/fsp191 |
id |
fthighwire:oai:open-archive.highwire.org:icesjms:66/10/2253 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:icesjms:66/10/2253 2023-05-15T15:36:05+02:00 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 2009-12-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/66/10/2253 https://doi.org/10.1093/icesjms/fsp191 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/66/10/2253 http://dx.doi.org/10.1093/icesjms/fsp191 Copyright (C) 2009, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 2009 fthighwire https://doi.org/10.1093/icesjms/fsp191 2013-05-27T10:49:30Z <qd> 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. </qd>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 ( r 2 = 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. Text Balaenoptera acutorostrata Greenland HighWire Press (Stanford University) Greenland ICES Journal of Marine Science 66 10 2253 2266 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Articles |
spellingShingle |
Articles 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 |
topic_facet |
Articles |
description |
<qd> 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. </qd>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 ( r 2 = 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 |
Text |
author |
Laidre, Kristin L. Heagerty, Patrick J. Heide-Jørgensen, Mads Peter Witting, Lars Simon, Malene |
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 |
publishDate |
2009 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/66/10/2253 https://doi.org/10.1093/icesjms/fsp191 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Balaenoptera acutorostrata Greenland |
genre_facet |
Balaenoptera acutorostrata Greenland |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/66/10/2253 http://dx.doi.org/10.1093/icesjms/fsp191 |
op_rights |
Copyright (C) 2009, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
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_ |
1766366417508106240 |