Search The Database
Location | Gear | Catch | Technique | Bycatch species | Type | Results |
---|---|---|---|---|---|---|
Location California |
Gear
Gillnets
|
Catch Swordfish & Shark | Technique
Acoustic deterrent devices
|
Bycatch species Small Cetaceans (maximum length < 7.5 meters) | Type Field study in the wild | Results Pingers reduce bycatch of California sea lions (Zalophus californianus) and short-beaked common dolphins (Delphinus delphis) in the California drift gillnet fishery for swordfish and sharks. Catch of target fish species (broadbill swordfish, common thresher shark, and shortfin mako shark) and non-target species were not affected by pinger use. |
Location Argentina |
Gear
Gillnets
|
Catch Sea trout, croaker, letherjack, Patagonian smooth hound | Technique
Acoustic deterrent devices
|
Bycatch species Small Cetaceans (maximum length < 7.5 meters), Pontoporia blainvillei (Franciscana dolphin) | Type Field study in the wild | Results Pingers are effective in reducing the bycatch of Franciscana dolphins (Pontoporia blainvillei) but increase interactions between fishing gear and South American sea lions (Otaria byronia) in an Argentinian bottom gillnet fishery. |
Location Argentina |
Gear
Gillnets
|
Catch Sea trout, croaker, letherjack, Patagonian smooth hound | Technique
Acoustic deterrent devices
|
Bycatch species Pinnipeds | Type Field study in the wild | Results Pingers are effective in reducing the bycatch of Franciscana dolphins (Pontoporia blainvillei) but increase interactions between fishing gear and South American sea lions (Otaria byronia) in an Argentinian bottom gillnet fishery. |
Location Washington State |
Gear
Gillnets
|
Catch Salmon & sturgeon | Technique
Acoustic deterrent devices
|
Bycatch species Pinnipeds | Type Field study in the wild | Results Pingers do not reduce bycatch of harbor seals (Phoca vitulina) in the salmon and sturgeon gillnet fisheries in northern Washington state but do reduce bycatch of harbor porpoise (Phocoena phocoena). Pingers did not affect catch of target species, chinook salmon (Oncorhynchus tshawytscha) and sturgeon (Acipenser sp.). |
Location Washington State |
Gear
Gillnets
|
Catch Salmon & sturgeon | Technique
Acoustic deterrent devices
|
Bycatch species Phocoena phocoena (Harbor porpoise) | Type Field study in the wild | Results Pingers do not reduce bycatch of harbor seals (Phoca vitulina) in the salmon and sturgeon gillnet fisheries in northern Washington state but do reduce bycatch of harbor porpoise (Phocoena phocoena). Pingers did not affect catch of target species, chinook salmon (Oncorhynchus tshawytscha) and sturgeon (Acipenser sp.). |
Location Canada |
Gear
Gillnets
|
Catch Herring | Technique
Acoustic deterrent devices
|
Bycatch species Small Cetaceans (maximum length < 7.5 meters), Phocoena phocoena (Harbor porpoise) | Type Field study in the wild | Results Harbor porpoise (Phocoena phocoena) avoided an area around a non-lethal, experimental gillnet equipped with a pinger in British Columbia, Canada. In a separate experiment with gillnets in the Baltic Sea, pingers did not affect the catch of targeted herring (Clupea harengus). |
Location Canada |
Gear
Traps
|
Catch Cod | Technique
Acoustic deterrent devices
|
Bycatch species Megaptera novaeangliae (Humpback whale) | Type Field study in the wild | Results Cod traps equipped with pingers resulted in a reduction in collisions with humpback whales (Megaptera novaeangliae) in Newfoundland, Canada. Traps with alarms caught more fish than traps without alarms. |
Location New Zealand |
Gear
Gillnets
|
Catch n/a | Technique
Acoustic deterrent devices
|
Bycatch species Small Cetaceans (maximum length < 7.5 meters) | Type Field study in the wild | Results Acoustic pingers were tested for their effectiveness to reduce entanglement of Hector's dolphins in New Zealand gillnets. A remote control device was used to raise either active or passive acoustic pingers near Hector's dolphins. The dolphins' movement and distribution was observed from shore.Dolphins avoided the immediate area when pingers were active, but did not leave the larger harbor area. Dolphin sightings made during active pinger trials were distributed significantly farther from the source than during passive trials. |
Location Canada |
Gear
Gillnets
|
Catch n/a | Technique
Acoustic deterrent devices
|
Bycatch species Small Cetaceans (maximum length < 7.5 meters), Phocoena phocoena (Harbor porpoise) | Type Field study in the wild | Results Three different device types were mounted on floatline to test their potential for reducing harbor porpoise bycatch. The devices were two passive reflectors (target strength ranging from -38 dB to -24 dB) and a 2.9 kHz pinger. Behavioral responses of 355 harbor porpoise groups were monitored. 92.4% of the groups avoided the pinger equipped floatline, while only half the groups avoided the reflectors and control, empty, floatline. 92.4% of porpoise groups avoided pinger equipped floatlines |
Location Canada |
Gear
Gillnets
|
Catch n/a | Technique
Acoustic deterrent devices
Passive acoustic deterrents
|
Bycatch species Phocoena phocoena (Harbor porpoise) | Type Field study in the wild | Results Three different device types were mounted on floatline to test their potential for reducing harbor porpoise bycatch. The devices were two passive reflectors (target strength ranging from -38 dB to -24 dB) and a 2.9 kHz pinger. Behavioral responses of 355 harbor porpoise groups were monitored. 92.4% of the groups avoided the pinger equipped floatline, while only half the groups avoided the reflectors and control, empty, floatline. Did not significantly reduce interactions with gear |