Measurement methods adaptation in fisheries
Diagrama de temas
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To estimate resource distribution and abundance, use sound wave instead of radio wave, which weakens under the water.
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Measurement of echo from fish:
Body angle influences the target strength (TS). Ribbonfish’s upright posture makes a big difference of the TS.
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Field research on the fishing boat:
Estimate distribution and abundance of ribbionfish at the Bungo channel, known as a place of origin of the fish.
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Animals with loggers or pingers record their behavior by themselves. We have become able to track their lives under the water.
While data are accumulated in a tag for biologging, they are transmitted from the remote distance to a researcher for biotelemetry.
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Tracking the spawning migration of pacific herrings:
Reveal pacific herrings' fast migration to the spawning area in the coast.
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Measurement of shell movements of pacific oysters:
Detect the shell movements from breathing and feeding behavior with an acceleration logger
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