DataSheet_1_Gradually decreasing daylength after smoltification induced by “winter signal“ reduced sexual maturation in male Atlantic salmon.docx
Introduction Maturation in seawater-adapted (smoltified) male Atlantic salmon is undesirable yet frequently reported in fish weighing up to 1 kg reared under intensive conditions in land-based facilities. Although the photoperiod regulates both smoltification and maturation, the optimal post-smoltif...
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Online Access: | https://doi.org/10.3389/faquc.2023.1235584.s001 https://figshare.com/articles/dataset/DataSheet_1_Gradually_decreasing_daylength_after_smoltification_induced_by_winter_signal_reduced_sexual_maturation_in_male_Atlantic_salmon_docx/25001381 |
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ftfrontimediafig:oai:figshare.com:article/25001381 2024-09-15T17:56:23+00:00 DataSheet_1_Gradually decreasing daylength after smoltification induced by “winter signal“ reduced sexual maturation in male Atlantic salmon.docx Vetle Skjold Kjell-Arne Rørvik Lene Sveen Erik Burgerhout Vasco C. Mota Rúni Weihe Trine Ytrestøyl Marta Bou Hans Jákup Jacobsen Giovanni Allaoui Ole-Martin Fuskevåg Jens-Erik Dessen 2024-01-16T04:22:15Z https://doi.org/10.3389/faquc.2023.1235584.s001 https://figshare.com/articles/dataset/DataSheet_1_Gradually_decreasing_daylength_after_smoltification_induced_by_winter_signal_reduced_sexual_maturation_in_male_Atlantic_salmon_docx/25001381 unknown doi:10.3389/faquc.2023.1235584.s001 https://figshare.com/articles/dataset/DataSheet_1_Gradually_decreasing_daylength_after_smoltification_induced_by_winter_signal_reduced_sexual_maturation_in_male_Atlantic_salmon_docx/25001381 CC BY 4.0 Aquaculture Aquatic Ecosystem Studies and Stock Assessment Fisheries Management Fish Pests and Diseases Fish Physiology and Genetics Salmo salar sexual maturation photoperiod hormone 11-KT scotophase brackish water growth Dataset 2024 ftfrontimediafig https://doi.org/10.3389/faquc.2023.1235584.s001 2024-08-19T06:19:47Z Introduction Maturation in seawater-adapted (smoltified) male Atlantic salmon is undesirable yet frequently reported in fish weighing up to 1 kg reared under intensive conditions in land-based facilities. Although the photoperiod regulates both smoltification and maturation, the optimal post-smoltification regimen for the prevention of maturation is unclear. Methods In this study, mixed-sex Atlantic salmon weighing 95 g were exposed to three different photoperiod regimes: continuous daylength, gradually decreasing daylength, and short-to-long daylength after the induction of smoltification by the “winter signal” (12 h:12 h light:dark). Fish were maintained under these conditions in triplicate for 18 weeks in a brackish water flow-through system at 12°C and with a salinity of 20 ppt. This initial phase was followed by a grow-out period (1 kg–2.5 kg) in seawater (32-ppt salinity) at 13°C for 11 weeks, with exposure to decreasing daylength. Throughout the 29-week study, body condition, gonad development, and morphological traits were assessed. Additionally, during exposure to brackish water, serum 11-ketotestosterone (11-KT) levels were quantified, and the testes were examined histologically. Upon termination of the study, the maturation rate was determined. Results This study exclusively detected maturation among male salmon. Under continuous light exposure, the number of fish initiating maturity steadily increased from week 8 and continued to increase in the subsequent samplings. In the short-to-long daylength group, a subset of male fish showed elevated 11-KT levels at week 14, although their gonadal development and morphological changes were not evident until week 18. Male fish exposed to decreasing daylength showed no substantial increase in 11-KT levels, although a few fish exhibited advanced gonad development by week 18. At the end of the trial, markedly lower percentages of maturing and fully mature male fish were observed among those fish previously exposed to decreasing daylength. The maturation rates at ... Dataset Atlantic salmon Salmo salar Frontiers: Figshare |
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Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Aquaculture Aquatic Ecosystem Studies and Stock Assessment Fisheries Management Fish Pests and Diseases Fish Physiology and Genetics Salmo salar sexual maturation photoperiod hormone 11-KT scotophase brackish water growth |
spellingShingle |
Aquaculture Aquatic Ecosystem Studies and Stock Assessment Fisheries Management Fish Pests and Diseases Fish Physiology and Genetics Salmo salar sexual maturation photoperiod hormone 11-KT scotophase brackish water growth Vetle Skjold Kjell-Arne Rørvik Lene Sveen Erik Burgerhout Vasco C. Mota Rúni Weihe Trine Ytrestøyl Marta Bou Hans Jákup Jacobsen Giovanni Allaoui Ole-Martin Fuskevåg Jens-Erik Dessen DataSheet_1_Gradually decreasing daylength after smoltification induced by “winter signal“ reduced sexual maturation in male Atlantic salmon.docx |
topic_facet |
Aquaculture Aquatic Ecosystem Studies and Stock Assessment Fisheries Management Fish Pests and Diseases Fish Physiology and Genetics Salmo salar sexual maturation photoperiod hormone 11-KT scotophase brackish water growth |
description |
Introduction Maturation in seawater-adapted (smoltified) male Atlantic salmon is undesirable yet frequently reported in fish weighing up to 1 kg reared under intensive conditions in land-based facilities. Although the photoperiod regulates both smoltification and maturation, the optimal post-smoltification regimen for the prevention of maturation is unclear. Methods In this study, mixed-sex Atlantic salmon weighing 95 g were exposed to three different photoperiod regimes: continuous daylength, gradually decreasing daylength, and short-to-long daylength after the induction of smoltification by the “winter signal” (12 h:12 h light:dark). Fish were maintained under these conditions in triplicate for 18 weeks in a brackish water flow-through system at 12°C and with a salinity of 20 ppt. This initial phase was followed by a grow-out period (1 kg–2.5 kg) in seawater (32-ppt salinity) at 13°C for 11 weeks, with exposure to decreasing daylength. Throughout the 29-week study, body condition, gonad development, and morphological traits were assessed. Additionally, during exposure to brackish water, serum 11-ketotestosterone (11-KT) levels were quantified, and the testes were examined histologically. Upon termination of the study, the maturation rate was determined. Results This study exclusively detected maturation among male salmon. Under continuous light exposure, the number of fish initiating maturity steadily increased from week 8 and continued to increase in the subsequent samplings. In the short-to-long daylength group, a subset of male fish showed elevated 11-KT levels at week 14, although their gonadal development and morphological changes were not evident until week 18. Male fish exposed to decreasing daylength showed no substantial increase in 11-KT levels, although a few fish exhibited advanced gonad development by week 18. At the end of the trial, markedly lower percentages of maturing and fully mature male fish were observed among those fish previously exposed to decreasing daylength. The maturation rates at ... |
format |
Dataset |
author |
Vetle Skjold Kjell-Arne Rørvik Lene Sveen Erik Burgerhout Vasco C. Mota Rúni Weihe Trine Ytrestøyl Marta Bou Hans Jákup Jacobsen Giovanni Allaoui Ole-Martin Fuskevåg Jens-Erik Dessen |
author_facet |
Vetle Skjold Kjell-Arne Rørvik Lene Sveen Erik Burgerhout Vasco C. Mota Rúni Weihe Trine Ytrestøyl Marta Bou Hans Jákup Jacobsen Giovanni Allaoui Ole-Martin Fuskevåg Jens-Erik Dessen |
author_sort |
Vetle Skjold |
title |
DataSheet_1_Gradually decreasing daylength after smoltification induced by “winter signal“ reduced sexual maturation in male Atlantic salmon.docx |
title_short |
DataSheet_1_Gradually decreasing daylength after smoltification induced by “winter signal“ reduced sexual maturation in male Atlantic salmon.docx |
title_full |
DataSheet_1_Gradually decreasing daylength after smoltification induced by “winter signal“ reduced sexual maturation in male Atlantic salmon.docx |
title_fullStr |
DataSheet_1_Gradually decreasing daylength after smoltification induced by “winter signal“ reduced sexual maturation in male Atlantic salmon.docx |
title_full_unstemmed |
DataSheet_1_Gradually decreasing daylength after smoltification induced by “winter signal“ reduced sexual maturation in male Atlantic salmon.docx |
title_sort |
datasheet_1_gradually decreasing daylength after smoltification induced by “winter signal“ reduced sexual maturation in male atlantic salmon.docx |
publishDate |
2024 |
url |
https://doi.org/10.3389/faquc.2023.1235584.s001 https://figshare.com/articles/dataset/DataSheet_1_Gradually_decreasing_daylength_after_smoltification_induced_by_winter_signal_reduced_sexual_maturation_in_male_Atlantic_salmon_docx/25001381 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
doi:10.3389/faquc.2023.1235584.s001 https://figshare.com/articles/dataset/DataSheet_1_Gradually_decreasing_daylength_after_smoltification_induced_by_winter_signal_reduced_sexual_maturation_in_male_Atlantic_salmon_docx/25001381 |
op_rights |
CC BY 4.0 |
op_doi |
https://doi.org/10.3389/faquc.2023.1235584.s001 |
_version_ |
1810432587073585152 |