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    Assessing reef fish assemblage structure: how do different stereo-video techniques compare?

    Access Status
    Fulltext not available
    Authors
    Watson, D.
    Harvey, Euan
    Fitzpatrick, B.
    Langlois, T.
    Shedrawi, G.
    Date
    2010
    Type
    Journal Article
    
    Metadata
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    Citation
    Watson, D. and Harvey, E. and Fitzpatrick, B. and Langlois, T. and Shedrawi, G. 2010. Assessing reef fish assemblage structure: how do different stereo-video techniques compare?. Marine Biology. 157: pp. 1237-1250.
    Source Title
    Marine Biology
    DOI
    10.1007/s00227-010-1404-x
    ISSN
    00253162
    URI
    http://hdl.handle.net/20.500.11937/3374
    Collection
    • Curtin Research Publications
    Abstract

    Quantitative sampling of benthic communities is central to a wide range of ecological research, from understanding spatial distribution and ecology to impact studies. With the need to sample deep as well as shallow regions, limited sampling capabilities of diver-based methods and the expanding footprint of human activity, there is a need for an effective system capable of classifying benthic assemblages and able to monitor potential anthropogenic impacts. Here we describe a remote system capable of collecting benthic photo-quadratsto depths of 100 m. A procedure for the classification of these images into 64 abiotic and biotic categories is also described. During a64-daysamplingprogramthatincludedsamplingatseven locations along 1,200 km of coastline that resulted in the collection of over 9,000 images, only one day of sampling was lost due to equipment malfunction, with 99.5% of points able to be classified to the taxonomic resolution required, demonstrating the reliability and accuracy of this system. Furthermore, the incorporation of differential GPS and ultra-short baseline positioning system allowed collected images to be geo-referenced to within 0.5 m. Such precision allows the system to be used in conjunction with hydroacoustic habitat mapping techniques and potentially for repeated monitoring of areas with a small spatial extent. Development of this system provides a cost-effective means of quantifying benthic assemblages over broad scales.

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