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    Using acoustics to study biological activity in the Perth Canyon, Western Australia

    Access Status
    Fulltext not available
    Authors
    Hawkins, Lauren
    McCauley, Robert
    Parnum, Iain
    Saunders, Ben
    Date
    2016
    Type
    Conference Paper
    
    Metadata
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    Citation
    Hawkins, L. and McCauley, R. and Parnum, I. and Saunders, B. 2016. Using acoustics to study biological activity in the Perth Canyon, Western Australia, in Acoustics2016: The Second Australasian Acoustical Societies Conference.
    Source Title
    Proceedings of Acoustics2016 - The Second Australasian Acoustical Societies Conference
    Source Conference
    Acoustics2016 - The Second Australasian Acoustical Societies Conference
    Additional URLs
    https://www.acoustics.asn.au/conference_proceedings/AASNZ2016/papers/p168.pdf
    School
    Centre for Marine Science and Technology
    URI
    http://hdl.handle.net/20.500.11937/6859
    Collection
    • Curtin Research Publications
    Abstract

    The Perth Canyon, off the coast of Western Australia, is a hotspot for biological activity, high biomass and biodiversity. It is also an area that is still relatively understudied. In this study, combinations of passive and active acoustical methodologies were used to study biological activity in the Canyon; and in particular, diel vertical migration. Data from sea noise loggers and Acoustical Doppler Current Profilers (ADCPs) mounted along the Perth Canyon were collected as part of the Integrated Marine Observing System (IMOS) program. The sea noise data recorded post-sunset fish choruses and the backscatter logged by the ADCP deployments measured increased scattering in the upper layers of the waters between sunset and sunrise. These two types of data provide an insight into secondary productivity in the Perth Canyon. This study revealed a correlation between the fish chorus noise level and the increase in scattering in the water column. Future research is planned to determine the sources and the reason(s) for the temporal variation of these phenomena.

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