Greenland halibut (Reinhardtius hippoglossoides) spawn annually but successive cohorts of oocytes develop over 2 years, complicating correct assessment of maturity
Ovary development in Greenland halibut ( Reinhardtius hippoglossoides ) is complex, with several cohorts of developing oocytes present during vitellogenesis; this is unusual for a determinate spawner. There are also speculations that Greenland halibut are not capable of spawning every year. To inves...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/f10-149 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F10-149 http://www.nrcresearchpress.com/doi/pdf/10.1139/F10-149 |
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crcansciencepubl:10.1139/f10-149 2024-04-28T08:20:56+00:00 Greenland halibut (Reinhardtius hippoglossoides) spawn annually but successive cohorts of oocytes develop over 2 years, complicating correct assessment of maturity Kennedy, James Gundersen, Agnes C. Høines, Åge S. Kjesbu, Olav S. 2011 http://dx.doi.org/10.1139/f10-149 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F10-149 http://www.nrcresearchpress.com/doi/pdf/10.1139/F10-149 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 68, issue 2, page 201-209 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2011 crcansciencepubl https://doi.org/10.1139/f10-149 2024-04-02T06:55:57Z Ovary development in Greenland halibut ( Reinhardtius hippoglossoides ) is complex, with several cohorts of developing oocytes present during vitellogenesis; this is unusual for a determinate spawner. There are also speculations that Greenland halibut are not capable of spawning every year. To investigate this possibility, ovaries from Greenland halibut caught throughout the year were examined histologically, and successive cohorts of oocytes were tracked through development. Results showed that the initial maturation of the ovaries from immature to spawning takes more than 1 year. The ovary initially develops as far as early vitellogenesis; however, the time scale for this is unclear. During the final year of development, the cohort of vitellogenic oocytes splits to form two cohorts; the larger cohort increases in size and is spawned in the coming spawning season. The smaller cohort also continues to develop, but at a much lower rate, in preparation for development for spawning in the following year. Within each month, there is a large range of oocyte sizes between fish; this leads to the extended spawning season that is known in many populations of this species. This complicates the assessment of maturity, and a more accurate microscopic maturity scale is proposed. Article in Journal/Newspaper Greenland Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 68 2 201 209 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Kennedy, James Gundersen, Agnes C. Høines, Åge S. Kjesbu, Olav S. Greenland halibut (Reinhardtius hippoglossoides) spawn annually but successive cohorts of oocytes develop over 2 years, complicating correct assessment of maturity |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Ovary development in Greenland halibut ( Reinhardtius hippoglossoides ) is complex, with several cohorts of developing oocytes present during vitellogenesis; this is unusual for a determinate spawner. There are also speculations that Greenland halibut are not capable of spawning every year. To investigate this possibility, ovaries from Greenland halibut caught throughout the year were examined histologically, and successive cohorts of oocytes were tracked through development. Results showed that the initial maturation of the ovaries from immature to spawning takes more than 1 year. The ovary initially develops as far as early vitellogenesis; however, the time scale for this is unclear. During the final year of development, the cohort of vitellogenic oocytes splits to form two cohorts; the larger cohort increases in size and is spawned in the coming spawning season. The smaller cohort also continues to develop, but at a much lower rate, in preparation for development for spawning in the following year. Within each month, there is a large range of oocyte sizes between fish; this leads to the extended spawning season that is known in many populations of this species. This complicates the assessment of maturity, and a more accurate microscopic maturity scale is proposed. |
format |
Article in Journal/Newspaper |
author |
Kennedy, James Gundersen, Agnes C. Høines, Åge S. Kjesbu, Olav S. |
author_facet |
Kennedy, James Gundersen, Agnes C. Høines, Åge S. Kjesbu, Olav S. |
author_sort |
Kennedy, James |
title |
Greenland halibut (Reinhardtius hippoglossoides) spawn annually but successive cohorts of oocytes develop over 2 years, complicating correct assessment of maturity |
title_short |
Greenland halibut (Reinhardtius hippoglossoides) spawn annually but successive cohorts of oocytes develop over 2 years, complicating correct assessment of maturity |
title_full |
Greenland halibut (Reinhardtius hippoglossoides) spawn annually but successive cohorts of oocytes develop over 2 years, complicating correct assessment of maturity |
title_fullStr |
Greenland halibut (Reinhardtius hippoglossoides) spawn annually but successive cohorts of oocytes develop over 2 years, complicating correct assessment of maturity |
title_full_unstemmed |
Greenland halibut (Reinhardtius hippoglossoides) spawn annually but successive cohorts of oocytes develop over 2 years, complicating correct assessment of maturity |
title_sort |
greenland halibut (reinhardtius hippoglossoides) spawn annually but successive cohorts of oocytes develop over 2 years, complicating correct assessment of maturity |
publisher |
Canadian Science Publishing |
publishDate |
2011 |
url |
http://dx.doi.org/10.1139/f10-149 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F10-149 http://www.nrcresearchpress.com/doi/pdf/10.1139/F10-149 |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 68, issue 2, page 201-209 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f10-149 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
68 |
container_issue |
2 |
container_start_page |
201 |
op_container_end_page |
209 |
_version_ |
1797583543582326784 |