The role of interspecific competition between nonnative fishes on successful establishment of nonnative fish

2014 Fiscal Year Final Research Report

• Project/Area Number: 24780196
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: General fisheries
• Research Institution: Fisheries Research Agency
• Principal Investigator: HASEGAWA Koh 独立行政法人水産総合研究センター, 北海道区水産研究所さけます資源部繁殖保全グループ, 研究員 (00603325)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 外来種問題 / 種間競争 / 密度依存型競争 / ブラウントラウト / ニジマス / サケ科魚類

Outline of Final Research Achievements

Interspecific interactions between nonnative species and other sympatric species play a key role on the successful establishment of nonnative species. Previous studies primarily focused on interspecific interactions between nonnative species and native species. Given the fact that multiple nonnative species co-occur in many regions, we should also consider interspecific interactions between nonnative species. In this study, Isuggested that nonnative salmonid, brown trout successfully established their population through competitive exclusion of another nonnative salmonid, rainbow trout by using the analysis of databese, field survey and enclosure experiments in combination.

Free Research Field

保全生態学