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Location | Gear | Catch | Technique | Bycatch species | Type | Results |
---|---|---|---|---|---|---|
Black Sea, Turkey |
Gillnets
|
Turbot (Psetta maxima) |
Acoustic deterrent devices
|
Phocoena phocoena (Harbor porpoise) | Field study in the wild | The experiment evaluated the effectiveness of two types of pingers (Aquamark 100 and Aquamark 200) to reduce the bycatch rate of harbor porpoise (Phocoena phocoena) in a set gillnet fishery in the Black Sea. The study also evaluated the effects of the pingers on catch of target and non-target fish species. There was no significant difference in catch of target and non-target fish species in trials with pingers versus control sets. There was also no significant difference between number of harbor porpoises caught in nets using pingers and when no pingers were used, although a low overall number of porpoises were caught (eight harbor porpoises were caught during the experiment – three in control nets, three in nets using the Aquamark 100, and one in nets using the Aquamark 200). |
Ireland |
Hooks-and-Lines
|
Pollock |
Acoustic deterrent devices
|
Gray seal (Halichoerus grypus atlantica) | Field study in the wild | Preliminary field studies were carried out on a potentially cetacean-friendly acoustic deterrent system for seals (played using underwater loudspeakers). The “smart seal deterrent signal” produces a startle response in seals rather than an aversion to a very loud noise, and is transmitted at a sound level which is not harmful to seals, even at very close distances. There was some evidence that the acoustic deterrent was effective at deterring gray seals (Halichoerus grypus) from fishing operations, although there was a low seal interaction rate regardless of whether the device was on or not. |