Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/93407
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Type: Journal article
Title: Effects of an electric field on white sharks: in situ testing of an electric deterrent
Author: Huveneers, C.
Rogers, P.
Semmens, J.
Beckmann, C.
Kock, A.
Page, B.
Goldsworthy, S.
Citation: PLoS One, 2013; 8(5):e62730-1-e62730-11
Publisher: Public Library of Science
Issue Date: 2013
ISSN: 1932-6203
1932-6203
Editor: Engelmann, J.
Statement of
Responsibility: 
Charlie Huveneers, Paul J. Rogers, Jayson M. Semmens, Crystal Beckmann, Alison A. Kock, Brad Page, Simon D. Goldsworthy
Abstract: Elasmobranchs can detect minute electromagnetic fields, <1 nV cm(-1), using their ampullae of Lorenzini. Behavioural responses to electric fields have been investigated in various species, sometimes with the aim to develop shark deterrents to improve human safety. The present study tested the effects of the Shark Shield Freedom7™ electric deterrent on (1) the behaviour of 18 white sharks (Carcharodon carcharias) near a static bait, and (2) the rates of attacks on a towed seal decoy. In the first experiment, 116 trials using a static bait were performed at the Neptune Islands, South Australia. The proportion of baits taken during static bait trials was not affected by the electric field. The electric field, however, increased the time it took them to consume the bait, the number of interactions per approach, and decreased the proportion of interactions within two metres of the field source. The effect of the electric field was not uniform across all sharks. In the second experiment, 189 tows using a seal decoy were conducted near Seal Island, South Africa. No breaches and only two surface interactions were observed during the tows when the electric field was activated, compared with 16 breaches and 27 surface interactions without the electric field. The present study suggests that the behavioural response of white sharks and the level of risk reduction resulting from the electric field is contextually specific, and depends on the motivational state of sharks.
Keywords: Animals
Rights: © 2013 Huveneers et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
DOI: 10.1371/journal.pone.0062730
Grant ID: http://purl.org/au-research/grants/arc/DP0988554
Appears in Collections:Aurora harvest 7
Earth and Environmental Sciences publications

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