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2014 Fiscal Year Final Research Report

Community assembly and adaptive evolution of prey and predator in insular environment

Research Project

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Project/Area Number 24570031
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Ecology/Environment
Research InstitutionToho University

Principal Investigator

HASEGAWA Masami  東邦大学, 理学部, 教授 (40250162)

Co-Investigator(Kenkyū-buntansha) MORI Akira  京都大学, 理学(系)研究科(研究院), 准教授 (80271005)
Project Period (FY) 2012-04-01 – 2015-03-31
Keywords島嶼生態学 / 生物地理 / 適応進化 / 爬虫類
Outline of Final Research Achievements

We obtained historical evidence for the roles of predator colonization order in shaping life history and color pattern evolution by oceanic island lizard. We applied time-calibrated phylogeographical analysis to the prey lizard, Plestiodon okadae, the predator snake, Elaphe quadrivirgata of the Japanese Izu Islands to determine if prey evolved adaptive phenotypes in association with colonization order of predators. Plestiodon lizards diverged from the mainland counterpart in ca. 5 Ma were K-selected on the islands without snake and mammal colonization. In contrast, lizards on the islands colonized only by snake around 0.3 Ma evolved vivid blue tail with higher reflection of ultra-violet as anti-snake tail autotomy tactic. Our results are consistent with the hypothesis that colonization sequence of predator is important in generating replicated community structure and shaping selective landscape for traits central to the adaptive divergence of prey life history and coloration.

Free Research Field

生態学

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Published: 2016-06-03  

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