Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/55586
Citations
Scopus Web of Science® Altmetric
?
?
Full metadata record
DC FieldValueLanguage
dc.contributor.authorHodgson, A.en
dc.contributor.authorMarsh, H.en
dc.contributor.authorDelean, J.en
dc.contributor.authorMarcus, L.en
dc.date.issued2007en
dc.identifier.citationAnimal Conservation, 2007; 10(2):263-273en
dc.identifier.issn1367-9430en
dc.identifier.issn1469-1795en
dc.identifier.urihttp://hdl.handle.net/2440/55586-
dc.descriptionJournal compilation © 2007 The Zoological Society of London. Copyright © 2007 John Wiley & Sons, Inc. All Rights Reserved.en
dc.description.abstractIncidental bycatch in fishing nets is a global cause of incidental mortality of marine mammals. Two classes of approaches attempt to mitigate this impact: (1) approaches that change the behaviour of the fisher (e.g. closures and gear modifications), (2) approaches that attempt to change the behaviour of the bycatch species (e.g. acoustic alarms or pingers). Even though the effectiveness of pingers has been established for very few bycatch species, pingers are now mandatory in many fisheries throughout the world. Pingers are being trialled in commercial gill net fisheries in tropical Australia to reduce the bycatch of the dugong and three species of coastal dolphins, despite an absence of robust assessments of: (1) their effectiveness in reducing bycatch, (2) the likelihood of alienating bycatch species from critical habitats. We conducted replicate experiments to test the behavioural responses of dugongs to 4 and 10 kHz pingers in an array simulating a net. Each experiment comprised three sequential 10-min treatments in which two pingers were: (1) inactive, (2) active, (3) inactive. The rate of decline of the number of dugongs within the focal arena did not change significantly while pingers were activated. Dugongs passed between the pingers (where a net would be located) irrespective of whether the alarms were active or inactive, fed throughout the experiments and did not change their orientation to investigate pinger noise, or their likelihood of vocalizing. We conclude that: (1) pingers are unlikely to alienate dugongs from critical habitats or reduce dugong mortalities in fishing nets, (2) bycatch mitigation strategies such as pingers that rely on changing animal behaviour should only be used after rigorous testing on all likely bycatch species.en
dc.description.statementofresponsibilityA. J. Hodgson, H. Marsh, S. Delean and L. Marcusen
dc.language.isoenen
dc.publisherCambridge Univ Pressen
dc.subjectblimp-cam; disturbance; displacement; entanglement; net; noise; pinger; vocalizationen
dc.titleIs attempting to change marine mammal behaviour a generic solution to the bycatch problem? A dugong case studyen
dc.typeJournal articleen
dc.identifier.rmid0020092676en
dc.identifier.doi10.1111/j.1469-1795.2007.00104.xen
dc.identifier.pubid37525-
pubs.library.collectionEarth and Environmental Sciences publicationsen
pubs.verification-statusVerifieden
pubs.publication-statusPublisheden
Appears in Collections:Earth and Environmental Sciences publications
Environment Institute publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.