Measurement methods adaptation in fisheries
Ringkasan topik
-
-
To estimate resource distribution and abundance, use sound wave instead of radio wave, which weakens under the water.
-
Measurement of echo from fish:
Body angle influences the target strength (TS). Ribbonfish’s upright posture makes a big difference of the TS.
-
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.
-
-
-
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.
-
Tracking the spawning migration of pacific herrings:
Reveal pacific herrings' fast migration to the spawning area in the coast.
-
Measurement of shell movements of pacific oysters:
Detect the shell movements from breathing and feeding behavior with an acceleration logger
-
-
