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dc.contributor.authorCato, Douglas
dc.contributor.authorNoad, Michael
dc.contributor.authorDunlop, Rebecca
dc.contributor.authorMcCauley, Robert
dc.contributor.authorGales, Nick
dc.contributor.authorSalgado-Kent, Chandra
dc.contributor.authorKniest, Hendrik
dc.contributor.authorPaton, David
dc.contributor.authorJenner, Curt
dc.contributor.authorNoad, John
dc.contributor.authorMaggi, Amos
dc.contributor.authorParnum, Iain
dc.contributor.authorDuncan, Alexander
dc.contributor.editorTerrance McMinn
dc.identifier.citationCato, Douglas H. and Noad, Michael J. and Dunlop, Rebecca A. and McCauley, Robert D. and Gales, Nicholas J. and Salgado-Kent, Chandra P. and Kniest, Hendrik and Paton, David and Jenner, K. Curt S. and Noad, John and Maggi, Amos L. and Parnum, Iain M. and Duncan, Alec J. 2012. Project BRAHSS: behavioural response of Australian humpback whales to seismic surveys, in McMinn, Terrance (ed), Acoustics 2012 Fremantle: Acoustics, Development and the Environment, The 2012 Conference of the Australian Acoustical Society, Nov 21-23 2012. Fremantle, Western Australia: Australian Acoustical Society

BRAHSS is a major project aimed at understanding how humpback whales respond to noise, particularly from seismic air gun arrays. It also aims to infer the longer term biological significance of the responses from the results and knowledge of normal behaviour. The aim is to provide the information that will allow seismic surveys to be conducted efficiently with minimal impact on whales. It also includes a study of the response to ramp-up in sound level. Ramp-up is widely used at the start of operations as a mitigation measure intended to cause whales to move away, but there is little information to show that it is effective. BRAHSS involves four experiments with migrating humpback whales off the east and west coasts of Australia with noise exposures ranging from a single air gun to a full seismic array. Two major experiments have been completed off the east coast, the second involving 70 scientists. Whale movements were tracked using theodolites on two high points ashore and behavioural observations were made from these points and from three small vessels and the source vessel. Vocalising whales were tracked underwater with an array of hydrophones. These and other moored acoustic receivers recorded the sound field at several points throughout the area. Tags (DTAGs) were attached to whales with suction caps for periods of several hours. Observations and measurements during the experiments include the wide range of variables likely to affect whale response and sufficient acoustic measurements to characterise the sound field throughout the area. The remaining two experiments will be conducted further off shore off the west coast in 2013 and 2014.

dc.publisherAcoustical Society of Australia
dc.subjectsingle beam
dc.subjectsidescan sonar
dc.titleProject BRAHSS: behavioural response of Australian humpback whales to seismic surveys.
dc.typeConference Paper
dcterms.source.titleProceedings of the Acoustical Society of Australia
dcterms.source.seriesProceedings of the Acoustical Society of Australia
dcterms.source.conferenceAcoustics 2012 Fremantle: Acoustics, Development and the Environment, the 2012 Conference of the Australian Acoustical Society
dcterms.source.conference-start-dateNov 21 2012
dcterms.source.conferencelocationFremantle, Western Australia
curtin.accessStatusOpen access

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