ダウンロード数: 0
このアイテムのファイル:
このアイテムは一定期間後に公開されます。
公開日については,アイテム画面の「著作権等」でご確認ください。
公開日については,アイテム画面の「著作権等」でご確認ください。
タイトル: | A key evolutionary step determining osmoregulatory ability for freshwater colonisation in early life stages of fish |
著者: | Oto, Yumeki Kuroki, Mari Iida, Midori Ito, Ryosuke Nomura, Shota Watanabe, Katsutoshi ![]() ![]() ![]() |
著者名の別形: | 大戸, 夢木 伊藤, 僚祐 野村, 翔太 渡辺, 勝敏 |
キーワード: | Amphidromy Freshwater resident Life history evolution Niche expansion Osmoregulation Transcriptome analysis |
発行日: | Nov-2023 |
出版者: | The Company of Biologists |
誌名: | Journal of Experimental Biology |
巻: | 226 |
号: | 21 |
論文番号: | jeb246110 |
抄録: | Colonisation of freshwater habitats by marine animals is a remarkable evolutionary event that has enriched biodiversity in freshwater ecosystems. The acquisition of tolerance to hypotonic stress during early life stages is presumed to be essential for their successful freshwater colonisation, but very little empirical evidence has been obtained to support this idea. This study aimed to comprehend the evolutionary changes in osmoregulatory mechanisms that enhance larval freshwater tolerance in amphidromous fishes, which typically spend their larval period in marine (ancestral) habitats and the rest of their life history stages in freshwater (derived) habitats. We compared the life history patterns and changes in larval survivorship and gene expression depending on salinity among three congeneric marine-originated amphidromous goby species (Gymnogobius), which had been suggested to differ in their larval dependence on freshwater habitats. An otolith microchemical analysis and laboratory-rearing experiment confirmed the presence of freshwater residents only in G. urotaenia and higher larval survivorship of this species in the freshwater condition than in the obligate amphidromous G. petschiliensis and G. opperiens. Larval whole-body transcriptome analysis revealed that G. urotaenia from both amphidromous and freshwater-resident populations exhibited the greatest differences in expression levels of several osmoregulatory genes, including aqp3, which is critical for water discharge from their body during early fish development. The present results consistently support the importance of enhanced freshwater tolerance and osmoregulatory plasticity in larval fish to establish freshwater forms, and further identified key candidate genes for larval freshwater adaptation and colonisation in the goby group. |
著作権等: | © 2023. Published by The Company of Biologists Ltd The full-text file will be made open to the public on 09 NOVEMBER 2024 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. |
URI: | http://hdl.handle.net/2433/287298 |
DOI(出版社版): | 10.1242/jeb.246110 |
PubMed ID: | 37767765 |
出現コレクション: | 学術雑誌掲載論文等 |
![](/dspace/image/articlelinker.gif)
このリポジトリに保管されているアイテムはすべて著作権により保護されています。