Sampling methods


Biologging study

We use animal-borne data loggers to monitor behaviors of free-ranging carp.

Step 1

Firstly, we anaesthetize a fish and measure its body length and body mass. We also take a tiny tissue from its fin for DNA analysis.

手順1の様子

Step 2

The fish is then tagged with a ribbon tag and a logger package. The package consists of four electronic devices (a video logger, an accelerometer, a VHF transmitter, a timed-release system) which are all molded in one float.

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Step 3

After the tag attachment, the fish is released into the lake. The loggers record behavioral data (3–5 days) and underwater video images (~12 hours).

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Step 4

The logger package pops off from the fish and floats to the water surface.

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Step 5

We search for the package using a VHF receiver and antenna and retrieve the package.

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Step 6

Download behavioral data and videos from the loggers.

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Members

Makoto A. YOSHIDA

picture of Makoto A. YOSHIDA

Makoto A. YOSHIDA (Ph.D.)

Research Associate
Lake Biwa Branch Office / Center for Environmental Biology and Ecosystem Studies, NIES

Kohji MABUCHI

picture of Kohji MABUCHI

Kohji MABUCHI (Ph.D.)

Senior Researcher
Lake Biwa Branch Office / Center for Environmental Biology and Ecosystem Studies, NIES

Katsufumi SATO

佐藤克文の写真

Katsufumi SATO (Ph.D.)

Professor
Atmosphere and Ocean Research Institute, The University of Tokyo

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