Behavioral responses of bottlenose dolphins, Tursiops truncatus, to gillnets and acoustic alarms

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Citation: Cox, T.M, Read, A.J., Swanner, D., Urian, K. and D. Waples, 2004. Behavioral responses of bottlenose dolphins, Tursiops truncatus, to gillnets and acoustic alarms. Biological Conservation, 115, ps 203-212.
Publisher address:
Contact information: tara.cox@duke.edu
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Summary:

The authors tested the behavioural response of bottlenose dolphins (Tursiops truncatus) to gill nets equipped with active and control Dukane NetMark 1000 pingers. Although dolphins were observed significantly fewer times within a 100m circular buffer zone from the alarms, overall results showed no significant differences in the number of groups observed, or closest approaches by animals to the net, between active and control periods.
Field Studies:
Location Fishing gear Reduction technique Bycatch species Effect on bycatch species Catch Effect on target catch Type
North Carolina, USA Gillnets Acoustic pingers Small Cetaceans (maximum length < 7.5 meters) No difference on group size or closest approach to the net between active and control pingers Mixed None In the wild