Development of a method to detect feeding events of Japanese eel using bio-logging and its application in the field

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K18742
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Aquatic bioproduction science
• Research Institution: Kobe University
• Principal Investigator: ITAKURA HIKARU 神戸大学, 理学研究科, 特別研究員(PD) (40749040)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: ニホンウナギ / 摂餌生態 / バイオロギング / バイオテレメトリー / 汽水域 / 保全

Outline of Final Research Achievements

This study tried to develop a method to detect feeding events of yellow phase Japanese eels using bio-logging, and investigated activities, behaviors and food habits of yellow eels in the brackish-water lake (Lake Jinzai) using biotelemetry and stomach content analysis. Results showed that feeding events of eels could not be detected by increase in body temperature in the peritoneal cavity after feeding. Moreover, activities of yellow eels closely associated with the light density. The core areas of the tagged eels were restricted to the proximity of the shore areas, probably because their principal prey organisms mainly inhabited there.

Free Research Field

魚類生態学