Effects of an electric field on white sharks: in situ testing of an electric deterrent.

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 eff...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Charlie Huveneers, Paul J Rogers, Jayson M Semmens, Crystal Beckmann, Alison A Kock, Brad Page, Simon D Goldsworthy
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/30953d3324644c33b3ac7527ae5c6a96
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:30953d3324644c33b3ac7527ae5c6a96
record_format	dspace
spelling	oai:doaj.org-article:30953d3324644c33b3ac7527ae5c6a962021-11-18T07:47:02ZEffects of an electric field on white sharks: in situ testing of an electric deterrent.1932-620310.1371/journal.pone.0062730https://doaj.org/article/30953d3324644c33b3ac7527ae5c6a962013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23658766/?tool=EBIhttps://doaj.org/toc/1932-6203Elasmobranchs 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.Charlie HuveneersPaul J RogersJayson M SemmensCrystal BeckmannAlison A KockBrad PageSimon D GoldsworthyPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 5, p e62730 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Charlie Huveneers Paul J Rogers Jayson M Semmens Crystal Beckmann Alison A Kock Brad Page Simon D Goldsworthy Effects of an electric field on white sharks: in situ testing of an electric deterrent.
description	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.
format	article
author	Charlie Huveneers Paul J Rogers Jayson M Semmens Crystal Beckmann Alison A Kock Brad Page Simon D Goldsworthy
author_facet	Charlie Huveneers Paul J Rogers Jayson M Semmens Crystal Beckmann Alison A Kock Brad Page Simon D Goldsworthy
author_sort	Charlie Huveneers
title	Effects of an electric field on white sharks: in situ testing of an electric deterrent.
title_short	Effects of an electric field on white sharks: in situ testing of an electric deterrent.
title_full	Effects of an electric field on white sharks: in situ testing of an electric deterrent.
title_fullStr	Effects of an electric field on white sharks: in situ testing of an electric deterrent.
title_full_unstemmed	Effects of an electric field on white sharks: in situ testing of an electric deterrent.
title_sort	effects of an electric field on white sharks: in situ testing of an electric deterrent.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/30953d3324644c33b3ac7527ae5c6a96
work_keys_str_mv	AT charliehuveneers effectsofanelectricfieldonwhitesharksinsitutestingofanelectricdeterrent AT pauljrogers effectsofanelectricfieldonwhitesharksinsitutestingofanelectricdeterrent AT jaysonmsemmens effectsofanelectricfieldonwhitesharksinsitutestingofanelectricdeterrent AT crystalbeckmann effectsofanelectricfieldonwhitesharksinsitutestingofanelectricdeterrent AT alisonakock effectsofanelectricfieldonwhitesharksinsitutestingofanelectricdeterrent AT bradpage effectsofanelectricfieldonwhitesharksinsitutestingofanelectricdeterrent AT simondgoldsworthy effectsofanelectricfieldonwhitesharksinsitutestingofanelectricdeterrent
_version_	1718422962311266304

Effects of an electric field on white sharks: in situ testing of an electric deterrent.

Ejemplares similares