Zoogeographic and systematic studies on marine and diadromous fishes related to glacial-interglacial cycles

2014 Fiscal Year Final Research Report

• Project/Area Number: 24370036
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Kyoto University
• Principal Investigator: TETSUJI Nakabo 京都大学, 総合博物館, 教授 (20164270)
• Co-Investigator(Kenkyū-buntansha): NAKAYAMA Kouji 京都大学, 大学院農学研究科, 助教 (50324661) ; KAI Yoshiaki 京都大学, フィールド科学教育研究センター, 助教 (30379036)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 種分化 / 氷河期海洋生物地理 / 系統地理学

Outline of Final Research Achievements

For an understanding of the impact of glacial–interglacial cycles on distribution of fishes of the Japanese Archipelago and neighboring regions, we determined patterns of population structure focusing on marine and diadromous fishes. We found extensive population sub-divisions among geographic regions associated with a sea-level regression during glacial periods in some marine cold-water species. In addition, the genetic population structure in marine temperate-water species suggested population subdivision during glacial periods and consequent secondary contact during interglacial periods across the Tsushima Strait. Although the impact of glacial–interglacial cycles on freshwater fishes is well known, we showed such impact also have affected the population structures and distributional patterns of marine and diadromous fishes.

Free Research Field

魚類系統分類学