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Size-driven parr-smolt transformation in masu salmon (Oncorhynchus masou)

Anadromous salmonids exhibit partial migration, where some individuals within a population migrate down to the ocean through complex interactions between body size and photoperiod. This study aimed to integrate the ontogenetic and seasonal patterns of smoltification, a series of changes for future m...

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Autores principales: Ugachi, Yuki, Kitade, Haruka, Takahashi, Eisuke, Suzuki, Shotaro, Hayashi, Mizuki, Yamada, Taiga, Cui, Wenda, Shimizu, Munetaka
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10547828/
https://www.ncbi.nlm.nih.gov/pubmed/37789097
http://dx.doi.org/10.1038/s41598-023-43632-7
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author Ugachi, Yuki
Kitade, Haruka
Takahashi, Eisuke
Suzuki, Shotaro
Hayashi, Mizuki
Yamada, Taiga
Cui, Wenda
Shimizu, Munetaka
author_facet Ugachi, Yuki
Kitade, Haruka
Takahashi, Eisuke
Suzuki, Shotaro
Hayashi, Mizuki
Yamada, Taiga
Cui, Wenda
Shimizu, Munetaka
author_sort Ugachi, Yuki
collection PubMed
description Anadromous salmonids exhibit partial migration, where some individuals within a population migrate down to the ocean through complex interactions between body size and photoperiod. This study aimed to integrate the ontogenetic and seasonal patterns of smoltification, a series of changes for future marine life, in a strain of masu salmon (Oncorhynchus masou). Spring smoltification, as evidenced by the activation of gill Na(+),K(+)-ATPase (NKA), was induced during winter under an advanced photoperiod. In addition, juveniles showed an additional peak in gill NKA activity in August regardless of the photoperiod. When juvenile masu salmon were subjected to feeding manipulations during the first spring/summer, only fish exceeding a fork length of 12 cm exhibited an increased gill NKA activity. We tested whether size-driven smoltification required a long-day period by exposing juveniles to a constant short-day length (9-h light and 15-h dark) from January to November. Juveniles under short-day conditions exceeded 12 cm in June but showed no signs of smoltification. Thus, masu salmon undergo photoperiod-limited, size-driven smoltification during the first summer and size-limited, photoperiod-driven smoltification the following spring. The findings of the present study provide a framework for further elucidation of the physiological mechanisms underlying partial migration in salmonids.
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spelling pubmed-105478282023-10-05 Size-driven parr-smolt transformation in masu salmon (Oncorhynchus masou) Ugachi, Yuki Kitade, Haruka Takahashi, Eisuke Suzuki, Shotaro Hayashi, Mizuki Yamada, Taiga Cui, Wenda Shimizu, Munetaka Sci Rep Article Anadromous salmonids exhibit partial migration, where some individuals within a population migrate down to the ocean through complex interactions between body size and photoperiod. This study aimed to integrate the ontogenetic and seasonal patterns of smoltification, a series of changes for future marine life, in a strain of masu salmon (Oncorhynchus masou). Spring smoltification, as evidenced by the activation of gill Na(+),K(+)-ATPase (NKA), was induced during winter under an advanced photoperiod. In addition, juveniles showed an additional peak in gill NKA activity in August regardless of the photoperiod. When juvenile masu salmon were subjected to feeding manipulations during the first spring/summer, only fish exceeding a fork length of 12 cm exhibited an increased gill NKA activity. We tested whether size-driven smoltification required a long-day period by exposing juveniles to a constant short-day length (9-h light and 15-h dark) from January to November. Juveniles under short-day conditions exceeded 12 cm in June but showed no signs of smoltification. Thus, masu salmon undergo photoperiod-limited, size-driven smoltification during the first summer and size-limited, photoperiod-driven smoltification the following spring. The findings of the present study provide a framework for further elucidation of the physiological mechanisms underlying partial migration in salmonids. Nature Publishing Group UK 2023-10-03 /pmc/articles/PMC10547828/ /pubmed/37789097 http://dx.doi.org/10.1038/s41598-023-43632-7 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Ugachi, Yuki
Kitade, Haruka
Takahashi, Eisuke
Suzuki, Shotaro
Hayashi, Mizuki
Yamada, Taiga
Cui, Wenda
Shimizu, Munetaka
Size-driven parr-smolt transformation in masu salmon (Oncorhynchus masou)
title Size-driven parr-smolt transformation in masu salmon (Oncorhynchus masou)
title_full Size-driven parr-smolt transformation in masu salmon (Oncorhynchus masou)
title_fullStr Size-driven parr-smolt transformation in masu salmon (Oncorhynchus masou)
title_full_unstemmed Size-driven parr-smolt transformation in masu salmon (Oncorhynchus masou)
title_short Size-driven parr-smolt transformation in masu salmon (Oncorhynchus masou)
title_sort size-driven parr-smolt transformation in masu salmon (oncorhynchus masou)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10547828/
https://www.ncbi.nlm.nih.gov/pubmed/37789097
http://dx.doi.org/10.1038/s41598-023-43632-7
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