Long-term effectiveness of pingers on a small population of finless porpoises in Japan

Omura Bay, Japan


Target catch: 

Not studied

Study Type: 

Field study in the wild

Effect on target catch: 

Not tested

Effect on bycatch species: 

Initially, pinger use decreased porpoise encounter rates with gillnets. However, this effect decreased over time but was effective later after temporary cessation of pinger use.

Bycatch species: 

Fishing Gear: 

Reduction technique: