Spatial and temporal impact of pingers on porpoises

Authors
Carlstrom J., Berggren P., Tregenza N.J.C
Year
Journal/Publisher Name
Can. J. Fish. Aquat. Sci
Volume (Issue #)
66
Page #s
72-82
Contact information
julia.carlstrom@aquabiota.se
AquaBiota Water Research AB, Svante Arrhenius
vag 21A, SE-104 05 Stockholm, Sweden
Summary
Authors investigated the spatial and temporal responses of porpoises to simulated bottom-set nets equipped with periodically operating Dukane NetMark 1000 pingers.

Field Studies

Field Study 561

Study Type
Field study in the wild
Location
Baltic
Target catch
None reported
Effect on bycatch species
Pingers significantly reduced echolocation encounter rates by 50-100% at 500m; sighting reduced up to 375m. Porpoise return time was 6 hrs when pingers were silent after being active for 24 hrs 50 min
Effect on target catch
None reported
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Phocoena phocoena (Harbor porpoise)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Gillnets