Anatomy of a Marine Dispersal Barrier

2015 Fiscal Year Final Research Report

• Project/Area Number: 23370038
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Hokkaido University
• Principal Investigator: Dick Matthew 北海道大学, 理学(系)研究科(研究院), 非常勤講師 (80374205)
• Co-Investigator(Kenkyū-buntansha): KOGAME Kazuhiro 北海道大学, 大学院理学研究院, 教授 (80215219) ; KAJIHARA Hiroshi 北海道大学, 大学院理学研究院, 准教授 (30360895) ; KATOH Toru 北海道大学, 大学院理学研究院, 助教 (80374198)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: 海峡 / 分散障壁 / 集団遺伝学 / 系統地理学

Outline of Final Research Achievements

Tsugaru Strait does not appear to be acting, and to have acted, as a strong marine dispersal barrier, as shown by population genetic and phylogeographic analyses of marine organisms in nine taxonomic groups that were sampled from the intertidal zone in the vicinity of the strait. Species with longer period of planktonic larval duration tended to show higher dispersal ability. In many of the target species, the results indicated that populations with a certain degree of size have been maintained before the last glacial period. This study also revealed the existence of multiple cryptic species, i.e., species that morphologically resemble each other but can be differentiated with molecular sequence data.

Free Research Field

海産無脊椎動物の生物多様性