Tracking oocyte development and the timing of skipped spawning for north-east Arctic haddock (Melanogrammus aeglefinus)
The present study tracked oocyte development over 9 months and noted incidences of ‘skipping’, i.e., adults terminating their upcoming reproductive cycle, in field-caught north-east Arctic (NEA) haddock (Melanogrammus aeglefinus), currently the largest stock of this species. Applications of advanced...
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Language: | English |
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Online Access: | https://hdl.handle.net/11250/2997233 https://doi.org/10.1111/jfb.15057 |
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ftunivbergen:oai:bora.uib.no:11250/2997233 2023-05-15T14:58:45+02:00 Tracking oocyte development and the timing of skipped spawning for north-east Arctic haddock (Melanogrammus aeglefinus) Tronbøl, Frida Johannesen, Edda Alix, Maud dos Santos Schmidt, Thassya Christina Charitonidou, Katerina Folkvord, Arild Kjesbu, Olav Sigurd 2022 application/pdf https://hdl.handle.net/11250/2997233 https://doi.org/10.1111/jfb.15057 eng eng Wiley urn:issn:0022-1112 https://hdl.handle.net/11250/2997233 https://doi.org/10.1111/jfb.15057 cristin:2020309 Journal of Fish Biology, 2022. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2022 The Authors Journal of Fish Biology Journal article Peer reviewed 2022 ftunivbergen https://doi.org/10.1111/jfb.15057 2023-03-14T17:41:21Z The present study tracked oocyte development over 9 months and noted incidences of ‘skipping’, i.e., adults terminating their upcoming reproductive cycle, in field-caught north-east Arctic (NEA) haddock (Melanogrammus aeglefinus), currently the largest stock of this species. Applications of advanced image and histological techniques revealed the presence of cortical alveoli oocytes (CAO), which prevailed as the most advanced oocyte phase for 4–5 months. This new finding of an extended and early appearance of CAOs in this gadoid was supported by that vitellogenesis first started to appear 3 months later. The subsequent oocyte growth trajectories indicated that larger individuals [total length (TL) = 70 cm] typically spawn in the order of 3 weeks earlier than the smaller ones (TL = 40 cm). The spawning season appeared stretched over about 3 months. The majority of skipping females arrested oocyte growth at the CAO phase followed by atretic reabsorption. Compared to those individuals maturing for the spawning season, ‘skippers’ generally exhibited lower body condition, characterized also by relatively lower liver sizes at the time of the main spawning season. This study demonstrated well-developed skipping dynamics, but also that the CAO period, i.e., when skipping takes place, may be exceedingly long in this commercially valuable gadoid and that its reproductive cycle in many ways deviates from that of the data-rich, sympatric NEA cod (Gadus morhua). publishedVersion Article in Journal/Newspaper Arctic Gadus morhua University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Journal of Fish Biology 100 6 1464 1474 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
The present study tracked oocyte development over 9 months and noted incidences of ‘skipping’, i.e., adults terminating their upcoming reproductive cycle, in field-caught north-east Arctic (NEA) haddock (Melanogrammus aeglefinus), currently the largest stock of this species. Applications of advanced image and histological techniques revealed the presence of cortical alveoli oocytes (CAO), which prevailed as the most advanced oocyte phase for 4–5 months. This new finding of an extended and early appearance of CAOs in this gadoid was supported by that vitellogenesis first started to appear 3 months later. The subsequent oocyte growth trajectories indicated that larger individuals [total length (TL) = 70 cm] typically spawn in the order of 3 weeks earlier than the smaller ones (TL = 40 cm). The spawning season appeared stretched over about 3 months. The majority of skipping females arrested oocyte growth at the CAO phase followed by atretic reabsorption. Compared to those individuals maturing for the spawning season, ‘skippers’ generally exhibited lower body condition, characterized also by relatively lower liver sizes at the time of the main spawning season. This study demonstrated well-developed skipping dynamics, but also that the CAO period, i.e., when skipping takes place, may be exceedingly long in this commercially valuable gadoid and that its reproductive cycle in many ways deviates from that of the data-rich, sympatric NEA cod (Gadus morhua). publishedVersion |
format |
Article in Journal/Newspaper |
author |
Tronbøl, Frida Johannesen, Edda Alix, Maud dos Santos Schmidt, Thassya Christina Charitonidou, Katerina Folkvord, Arild Kjesbu, Olav Sigurd |
spellingShingle |
Tronbøl, Frida Johannesen, Edda Alix, Maud dos Santos Schmidt, Thassya Christina Charitonidou, Katerina Folkvord, Arild Kjesbu, Olav Sigurd Tracking oocyte development and the timing of skipped spawning for north-east Arctic haddock (Melanogrammus aeglefinus) |
author_facet |
Tronbøl, Frida Johannesen, Edda Alix, Maud dos Santos Schmidt, Thassya Christina Charitonidou, Katerina Folkvord, Arild Kjesbu, Olav Sigurd |
author_sort |
Tronbøl, Frida |
title |
Tracking oocyte development and the timing of skipped spawning for north-east Arctic haddock (Melanogrammus aeglefinus) |
title_short |
Tracking oocyte development and the timing of skipped spawning for north-east Arctic haddock (Melanogrammus aeglefinus) |
title_full |
Tracking oocyte development and the timing of skipped spawning for north-east Arctic haddock (Melanogrammus aeglefinus) |
title_fullStr |
Tracking oocyte development and the timing of skipped spawning for north-east Arctic haddock (Melanogrammus aeglefinus) |
title_full_unstemmed |
Tracking oocyte development and the timing of skipped spawning for north-east Arctic haddock (Melanogrammus aeglefinus) |
title_sort |
tracking oocyte development and the timing of skipped spawning for north-east arctic haddock (melanogrammus aeglefinus) |
publisher |
Wiley |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/2997233 https://doi.org/10.1111/jfb.15057 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Gadus morhua |
genre_facet |
Arctic Gadus morhua |
op_source |
Journal of Fish Biology |
op_relation |
urn:issn:0022-1112 https://hdl.handle.net/11250/2997233 https://doi.org/10.1111/jfb.15057 cristin:2020309 Journal of Fish Biology, 2022. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2022 The Authors |
op_doi |
https://doi.org/10.1111/jfb.15057 |
container_title |
Journal of Fish Biology |
container_volume |
100 |
container_issue |
6 |
container_start_page |
1464 |
op_container_end_page |
1474 |
_version_ |
1766330870202892288 |