A fundamental study to construct a conservation system of island ecosystem using new tracking method

2016 Fiscal Year Final Research Report

• Project/Area Number: 25281056
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Environmental and ecological symbiosis
• Research Institution: Tokai University
• Principal Investigator: Kohno Hiroyoshi 東海大学, 沖縄地域研究センター, 教授 (30439682)
• Co-Investigator(Kenkyū-buntansha): 依田 憲 名古屋大学, 環境学研究科, 教授 (10378606)
• Research Collaborator: YAMAMOTO Takashi 名古屋大学, 大学院・環境学研究科, 学振特別研究員
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 島嶼生態系 / 保全 / 海鳥 / バイオロギング / 個体群動態 / 長期的モニタリング / 利用海域

Outline of Final Research Achievements

Nakanokamishima, located in the Yaeyama Islands, is the breeding habitat for six seabird species. The long-term population trends of the Brown Booby and some parameters, being breeding success (79%) and annual survival rate of adult (92%), for the simple model of its trends were analyzed. Based on bio-logging, habitat of breeding was within radius of ca. 100km, and habitats of the non-breeding was from the southern Philippines to Papua New Guinea, or on the Yellow Sea. Although, the logger was attached to fledglings to explain the low survival during young (survival rate before breeding; 28%), we could not recapture them which returned to the island. Furthermore, non-breeding habitat of the Brown Noddy and the geological variation of the body size of the Streaked Shearwater were explained. It is necessary to elucidate the habitats of small species for the conservation of the island ecosystem in the future.

Free Research Field

海洋生態学