Acoustic fish tag, c 1976.

 
Acoustic fish tag, c 1976.
4 0 c m
 
31cm
actual image size: 23cm x 32cm

Description

Acoustic tags allow fish to be identified and tracked for relatively long periods, to show how they respond to environmental phenomena such as tides. Tags comprise a receiver and transmitter which returns the sonar signal to the tracking ship. The tag is attached to the fish by a thread and a conventional Peterson tag.

© Science Museum / Science & Society Picture Library

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