Coexistence-based risk assessment of genetic intrusion of domestic alien fish species

2016 Fiscal Year Final Research Report

• Project/Area Number: 26660190
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Rural environmental engineering/Planning
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Fukuda Shinji 東京農工大学, (連合)農学研究科(研究院), 助教 (70437771)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 遺伝子かく乱 / 生物多様性 / 生息環境 / 数値地図情報 / 空間分布モデリング / 捕食特性

Outline of Final Research Achievements

This study investigated the current situation of genetic intrusion, focusing on Topmouth gudgeon (Pseudorasbora parva). We observed many P. parva with genes originated in the continent in Tama river. In Ara river, genes originated in both continent-origin and western Japan were observed. Despite the invasions by domestic alien species, P. parva genes were not so intruded by the alien individuals. To reveal invasiveness of P. parva, a series of laboratory experiments were conducted to assess a functional response to food resources such as chironomid larvae and daphnia. We observed size-dependent responses in the fish.

Free Research Field

地域環境工学・計画学