Changes in blood testosterone and progesterone concentrations of the North Atlantic minke whale ( Balaenoptera acutorostrata ) during the feeding season
An opportunity to study seasonal changes of sex hormones in the North Atlantic minke whale (common minke whale, Balaenoptera acutorostrata) arose when we obtained access to fresh postmortem blood samples from 104 females and 83 males. The whales were caught in the North Atlantic during MaySeptember...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/f03-159 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-159 |
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crcansciencepubl:10.1139/f03-159 2023-12-17T10:20:23+01:00 Changes in blood testosterone and progesterone concentrations of the North Atlantic minke whale ( Balaenoptera acutorostrata ) during the feeding season Kjeld, Matthías Alfredsson, Árni Ólafsson, Örn Tryland, Morten Christensen, Ivar Stuen, Snorre Árnason, Alfred 2004 http://dx.doi.org/10.1139/f03-159 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-159 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 61, issue 2, page 230-237 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2004 crcansciencepubl https://doi.org/10.1139/f03-159 2023-11-19T13:39:24Z An opportunity to study seasonal changes of sex hormones in the North Atlantic minke whale (common minke whale, Balaenoptera acutorostrata) arose when we obtained access to fresh postmortem blood samples from 104 females and 83 males. The whales were caught in the North Atlantic during MaySeptember 19921995. Serum progesterone (P) and testosterone (T) concentrations were measured and compared with anatomical data. The frequency distribution of female serum P values showed two clusters, one consisting mainly of immature animals and the second of pregnant ones, with mean serum values of about 0.49 ± 0.04 (SE) and 44.2 ± 2.84 nmol·L 1 , respectively. The frequency distribution of male serum T did not show any group-specific distribution during the hunting season. The mean serum T value for the males was 0.63 ± 0.13 nmol·L 1 . Contrary to earlier reports on the Antarctic minke whale (Balaenoptera bonaerensis), serum T values rose during the hunting season in mature males (p < 0.0001). Serum P values in immature females increased during the season (p = 0.015). This increase agrees with the predominantly annual reproduction cycle of minke whales. Blood sex hormone measurements seem to be useful for detecting cyclic changes and pregnancy of minke whales. Article in Journal/Newspaper Antarc* Antarctic Antarctic Minke whale Balaenoptera acutorostrata Balaenoptera bonaerensis minke whale North Atlantic Canadian Science Publishing (via Crossref) Antarctic The Antarctic Canadian Journal of Fisheries and Aquatic Sciences 61 2 230 237 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Kjeld, Matthías Alfredsson, Árni Ólafsson, Örn Tryland, Morten Christensen, Ivar Stuen, Snorre Árnason, Alfred Changes in blood testosterone and progesterone concentrations of the North Atlantic minke whale ( Balaenoptera acutorostrata ) during the feeding season |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
An opportunity to study seasonal changes of sex hormones in the North Atlantic minke whale (common minke whale, Balaenoptera acutorostrata) arose when we obtained access to fresh postmortem blood samples from 104 females and 83 males. The whales were caught in the North Atlantic during MaySeptember 19921995. Serum progesterone (P) and testosterone (T) concentrations were measured and compared with anatomical data. The frequency distribution of female serum P values showed two clusters, one consisting mainly of immature animals and the second of pregnant ones, with mean serum values of about 0.49 ± 0.04 (SE) and 44.2 ± 2.84 nmol·L 1 , respectively. The frequency distribution of male serum T did not show any group-specific distribution during the hunting season. The mean serum T value for the males was 0.63 ± 0.13 nmol·L 1 . Contrary to earlier reports on the Antarctic minke whale (Balaenoptera bonaerensis), serum T values rose during the hunting season in mature males (p < 0.0001). Serum P values in immature females increased during the season (p = 0.015). This increase agrees with the predominantly annual reproduction cycle of minke whales. Blood sex hormone measurements seem to be useful for detecting cyclic changes and pregnancy of minke whales. |
format |
Article in Journal/Newspaper |
author |
Kjeld, Matthías Alfredsson, Árni Ólafsson, Örn Tryland, Morten Christensen, Ivar Stuen, Snorre Árnason, Alfred |
author_facet |
Kjeld, Matthías Alfredsson, Árni Ólafsson, Örn Tryland, Morten Christensen, Ivar Stuen, Snorre Árnason, Alfred |
author_sort |
Kjeld, Matthías |
title |
Changes in blood testosterone and progesterone concentrations of the North Atlantic minke whale ( Balaenoptera acutorostrata ) during the feeding season |
title_short |
Changes in blood testosterone and progesterone concentrations of the North Atlantic minke whale ( Balaenoptera acutorostrata ) during the feeding season |
title_full |
Changes in blood testosterone and progesterone concentrations of the North Atlantic minke whale ( Balaenoptera acutorostrata ) during the feeding season |
title_fullStr |
Changes in blood testosterone and progesterone concentrations of the North Atlantic minke whale ( Balaenoptera acutorostrata ) during the feeding season |
title_full_unstemmed |
Changes in blood testosterone and progesterone concentrations of the North Atlantic minke whale ( Balaenoptera acutorostrata ) during the feeding season |
title_sort |
changes in blood testosterone and progesterone concentrations of the north atlantic minke whale ( balaenoptera acutorostrata ) during the feeding season |
publisher |
Canadian Science Publishing |
publishDate |
2004 |
url |
http://dx.doi.org/10.1139/f03-159 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-159 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Minke whale Balaenoptera acutorostrata Balaenoptera bonaerensis minke whale North Atlantic |
genre_facet |
Antarc* Antarctic Antarctic Minke whale Balaenoptera acutorostrata Balaenoptera bonaerensis minke whale North Atlantic |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 61, issue 2, page 230-237 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f03-159 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
61 |
container_issue |
2 |
container_start_page |
230 |
op_container_end_page |
237 |
_version_ |
1785591541880848384 |