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    A comparison of techniques for ranging close-proximity mulloway (Argyrosomus Japonicus) calls with a single hydrophone

    Access Status
    Open access via publisher
    Authors
    Parsons, Miles
    McCauley, Robert
    Mackie, M.
    Duncan, Alec
    Date
    2010
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Parsons, M. and McCauley, R. and Mackie, M. and Duncan, A. 2010. A comparison of techniques for ranging close-proximity mulloway (Argyrosomus Japonicus) calls with a single hydrophone. Acoustics Australia. 38 (3): pp. 145-151.
    Source Title
    Acoustics Australia
    Additional URLs
    http://www.acoustics.asn.au/journal/2010/2010_38_3_Parsons_McCauley.pdf
    ISSN
    08146039
    School
    Centre for Marine Science and Technology
    URI
    http://hdl.handle.net/20.500.11937/44449
    Collection
    • Curtin Research Publications
    Abstract

    The accurate ranging of sounds produced by fish can provide valuable information on species ecology, and fish calls are being increasingly used to delineate and evaluate spawning grounds. In 2008, a single hydrophone was deployed on the riverbed of the Swan River, Western Australia, to assess the most effective technique for ranging mulloway (Argyrosomus japonicus) calls. During this experiment, the ranges of a calling mulloway were calculated using four techniques. These techniques involved comparing the characteristics of the direct and surface -reflected paths using: 1) arrival-time difference; 2) the pressure-amplitude ratios; 3) pulse sound-pressure-level ratios and; 4) a combination of techniques 1) and 2). Technique 1 proved the most consistent ranging technique, with accuracy limited by wave-motion-induced variation in water depth. However, a combination of the tested techniques is recommended when ranging fish.

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