Research and development of observation techniques for fish behavior and ecology under Antarctica sea ice

2021 Fiscal Year Final Research Report

• Project/Area Number: 18H02262
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 40030:Aquatic bioproduction science-related
• Research Institution: Tokyo University of Marine Science and Technology
• Principal Investigator: Miyamoto Yoshiori 東京海洋大学, 学術研究院, 教授 (80251685)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: 超音波テレメトリー / 魚類 / 行動・生態 / 海氷下 / 凍結河川

Outline of Final Research Achievements

We conducted a performance verification of the ultrasonic telemetry system (Ultrasonic transmitter attached to fish: a receiver that receives the pin and its signal) under sea ice, which has not been sufficiently investigated so far, and is used for conducting behavioral and ecological observations of fish under sea ice in the Antarctic.
In particular, verification of the operating period at low temperatures. And we did verification and elucidation of whether accurate Pinger position can be measured by the influence of the sound reflected (multiple reflections) on the sea ice because the sea surface is covered with sea ice.

Free Research Field

海洋音響学

Academic Significance and Societal Importance of the Research Achievements

海水温度が低く、海面が海氷で覆われている環境における超音波テレメトリーの運用はこれまで行われたことが少ない。設置手法や海氷による反射の影響などを明らかにすることで、極限水域でのテレメトリーシステムの活用が見込まれる。低温下での魚類の行動・生態は不明な点が多く、地球温暖化などに大きく影響されることが予想されるので、本成果を活用することで、魚類の行動・生態の新たな知見を得られる可能性を示唆している。