Parapatric evolution and adaptive divergence of Insular fishes along the Oyashio current

2015 Fiscal Year Final Research Report

• Project/Area Number: 25304011
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 海外学術
• Research Field: Biodiversity/Systematics
• Research Institution: Hokkaido University
• Principal Investigator: MUNEHARA Hiroyuki 北海道大学, 北方生物圏フィールド科学センター, 准教授 (80212249)
• Co-Investigator(Kenkyū-buntansha): YABE Mamoru 北海道大学, 水産科学研究科(研究院), 教授 (80174572) ; KOYA Yasunori 岐阜大学, 教育学部, 教授 (30273113) ; AWATA Satoshi 新潟大学, 自然科学系, 助教 (60569002) ; ABE Takuzou 北海道大学, 水産学部, 助教 (90639270)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: カムチャッツカ / 北太平洋要素種群 / アラスカ / カジカ / 不凍タンパク質 / 分子系統 / 寒冷適応 / バンクーバー島

Outline of Final Research Achievements

Sampling of Cottoids (Cottidae, Rhamphocottidae, Psychrolutidae, Agonidae, Cyclopteryidae, Hexagrammidae) using with SCUBA diving was conducted at Kamchatka Islands, Unalaska and Vancouver, and sampling by trawl net from University training ship also done in the Arctic Ocean. We successfully collected about 50 species from precise species identification after research. We carried out a molecular phylogenetic analysis from 6 families 47 genera 92 species including specimens collected in this study. As results we proposed some hypotheses such as species divergences from offshore to coastal area, disruptive evolution of species distributing in the East Pacific and the West Pacific and large phylogenetic vertical migration by lacking bladder. We also investigated the evolutional process of invasion to the Arctic Ocean by cottid fishes from genetic analyses of antifreeze proteins.

Free Research Field

魚類生態学