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    Marine seismic surveys - A study of environmental implications

    80370.pdf (213.0Kb)
    Access Status
    Open access
    Authors
    McCauley, Robert
    Fewtrell, Jane
    Duncan, Alec
    Jenner, Curt
    Jenner, Micheline-Nicole
    Penrose, John
    Prince, Robert
    Adhitya, Anita
    Murdoch, Julie
    McKabe, Kathyrn
    Date
    2000
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    McCauley, R. and Fewtrell, J. and Duncan, A. and Jenner, C. and Jenner, M.-N. and Penrose, J. and Prince, R. et al. 2000. Marine seismic surveys - A study of environmental implications. APPEA Journal. 40 (1): pp. 692-705.
    Source Title
    APPEA Journal
    DOI
    10.1071/Aj99048
    ISSN
    1326-4966
    Faculty
    Faculty of Science and Engineering
    School
    School of Earth and Planetary Sciences (EPS)
    Remarks

    This article is originally published in the Journal of the Australian Petroleum Production and Exploration Association (APPEA), 2000.

    URI
    http://hdl.handle.net/20.500.11937/80308
    Collection
    • Curtin Research Publications
    Abstract

    © CSIRO 2000. An experimental program was run by the Centre for Marine Science and Technology of Curtin University between March 1996 and October 1999 to study the environmental implications of offshore seismic survey noise. This work was initiated and sponsored by the Australian Petroleum Production and Exploration Association. The program: characterised air gun signal measurements; modelled air gun array sources and horizontal air gun signal propagation; developed an 'exposure model' to predict the scale of potential biological effects for a given seismic survey over its duration; made observations of humpback whales traversing a 3D seismic survey; carried out experiments of approaching humpback whales with a single operating air gun; carried out trials with an air gun approaching a cage containing sea turtles, fishes or squid; and modelled the response of fish hearing systems to airgun signals. The generalised response of migrating humpback whales to a 3D seismic vessel was to take some avoidance manoeuvre at >4 km then to allow the seismic vessel to pass no closer than 3 km. Humpback pods containing cows which were involved in resting behaviour in key habitat types, as opposed to migrating animals, were more sensitive and showed an avoidance response estimated at 7−12 km from a large seismic source. Male humpbacks were attracted to a single operating air gun due to what was believed the similarity of an air gun signal and a whale breaching event (leaping clear of the water and slamming back in). Based on the response of captive animals to an approaching single air gun and scaling these results, indicated sea turtles displayed a general 'alarm' response at an estimated 2 km range from an operating seismic vessel and behaviour indicative of avoidance estimated at 1 km. Similar trials with captive fishes showed a generic fish 'alarm' response of swimming faster, swimming to the bottom, tightening school structure, or all three, at an estimated 2−5 km from a seismic source. Modelling the fish ear predicted that at ranges < 2 km from a seismic source the ear would begin a rapid increase in displacement parameters. Captive fish exposed to short range air gun signals were seen to have some damaged hearing structures, but showed no evidence of increased stress. Captive squid showed a strong startle response to nearby air gun start up and evidence that they would significantly alter their behaviour at an estimated 2−5 km from an approaching large seismic source.

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    • Marine seismic surveys: analysis and propagation of air-gun signals; and effects of exposure on humpback whales, sea turtles, fishes and squid.
      McCauley, Robert ; Fewtrell, Jane; Duncan, Alec; Jenner, Curt; Jenner, Micheline-Nicole; Penrose, John; Prince, Robert; Adhitya, Anita; Murdoch, Julie; McKabe, Kathryn (2003)
      An experimental program was run by the Centre for Marine Science and Technology of Curtin University between March 1996 and October 1999 to study the environmental implications of offshore seismic survey noise. This ...
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      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 ...
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