Acoustic harassment devices reduce seal interaction in the Baltic salmon-trap, net fishery

Authors
Fjälling, A., Wahlbergb, M. and Westerber, H.
Year
Journal/Publisher Name
ICES Journal of Marine Science
Volume (Issue #)
63(9)
Page #s
1751-1758
Summary

AHDs with a source level of 179 dB re 1 µPa rms at 1 m were deployed during three consecutive fishing seasons. Fish catches in traps with AHDs were significantly higher than in the controls, while catch damage in the traps with AHDs was lower. However, towards the end of the fishing season catch damage increased in traps with AHDs.

Link
http://icesjms.oxfordjournals.org/cgi/content/abstract/63/9/1751

Field Studies

Acoustic harassment devices reduce seal interaction in the Baltic salmon-trap, net fishery

Study Type
Field study in the wild
Location
Baltic sea
Target catch
Salmon
Effect on bycatch species
Reduced depredation of salmon traps by grey seals (Halichoerus grypus)
Effect on target catch
Increased target catch and reduced seal damage to the catch
Bycatch species
Pinnipeds
Reduction technique
Acoustic deterrent devices
Fishing Gear
Traps