System development on dynamic habitat suitability assessment for migratory species in Sea-Canal-River

2015 Fiscal Year Final Research Report

• Project/Area Number: 25340113
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental and ecological symbiosis
• Research Institution: Yokohama National University
• Principal Investigator: Furukawa Keita 横浜国立大学, 統合的海洋教育研究センター, 客員教授 (00356031)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: マハゼの生活史 / 生物生息場 / 東京湾 / 閉鎖性海域 / 環境評価 / 数値モデル / 観測 / 市民参加

Outline of Final Research Achievements

Goby (Acanthogobius flavimanus) has nest in soft saline bed in 6-8m deep water in winter, and hatched larvae swim up to upstream limit of estuarine environment and settle on sandy shallow bed in spring. It becomes 6-8cm in early summer and growing up to 15-20cm in autumn.
Public participated census for Gobies and numerical hydraulic simulation of canal network in Tokyo bay reviles severe environmental condition in summer prevent proper succession and growth of gobies. Based on the monitoring results and simulated circulation, a conceptual model for the habitat restoration is proposed. One measure suggested is a construction of a small scale habitat in canal network. That is one of typical hardware type countermeasures. The effects of the construction have been tested by monitoring at constructed tidal-flats. It seems tidal-flats are acting as considerable habitat for Gobies.

Free Research Field

沿岸域生態系保全