• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2015 Fiscal Year Final Research Report

Poplation management vision of Dugon around the Ryukyu archipelago, Japan

Research Project

  • PDF
Project/Area Number 24570017
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Ohtaishi Noriyuki  北海道大学, 総合博物館, 名誉教授 (50001532)

Co-Investigator(Kenkyū-buntansha) MASUDA Ryuichi  北海道大学, 理学研究科, 教授 (80192748)
Research Collaborator NAKAGUN Shotaro  帯広畜産大学, 獣医学部
SUDO Kenji  北海道大学, 大学院環境科学院, 博士課程
TAISHI Yuka  北海道大学, 総合博物館, 研究生
Project Period (FY) 2012-04-01 – 2016-03-31
Keywordsジュゴン / 琉球列島 / 八重山諸島 / 新城下地島 / 七門御嶽 / 奉納骨 / 西表島 / 個体群復元
Outline of Final Research Achievements

From the first half of the 16th century to 1879, several to a dozen of dugongs (Dugong dugon) were dedicated to Ryukyu Kingdom every year. Skulls of dugong were also dedicated to Nanazou Utaki shrine on the Aragusuku shimoji Island. To understand the historical population once inhabiting around the Yaeyama islands, we conducted morphological and genetic analyses. Dynamite hunting had started around 1893-94, hunting nearly 300 individuals around Yaeyama Islands. Because of such overhunting, the population decreased dramatically until early 1910’s around Yaeyama Islands. The population of the dugongs around Okinawa Island was reported to be around dozens in 1998 and 3-5 individuals at present. To restore the population in Japan, success in captive breeding and natural dispersal from neighborhood populations are some options.

Free Research Field

保全生物学

URL: 

Published: 2017-05-10  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi