Studies on the environmental response of reproductive traits in Japanese anchovy

2015 Fiscal Year Final Research Report

• Project/Area Number: 25870508
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Aquatic bioproduction science; Aquatic life science
• Research Institution: Kyushu University
• Principal Investigator: Kitano Hajime 九州大学, (連合)農学研究科(研究院), 助教 (30635008)
• Co-Investigator(Renkei-kenkyūsha): Matsuyama Michiya 九州大学, 大学院農学研究院, 教授 (00183955) ; Nagano Naoki 九州大学, 大学院農学研究院, 准教授 (50437943) ; Sakaguchi Keishi 九州大学, 大学院農学研究院, 准教授 (50396280)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: カタクチイワシ / 性成熟 / 産卵 / 環境応答

Outline of Final Research Achievements

The aim of this study is to evaluate the environmental response of reproductive traits in Japanese anchovy Engraulis japonicus under captive conditions. Expression analyses of reproduction-related genes were also undertaken to enable to quantitative evaluation of the environmental response of reproductive traits. In individuals reared in the low-temperature condition, the body size (total length) of puberty onset was larger compared with individuals under natural water temperature. In addition, lower growth rate, slower increase of condition factor were observed in individuals under the low-temperature condition. The database of reproduction-related gene was constructed by transcriptome analyses using next-generation sequencer.

Free Research Field

魚類繁殖生理学