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    Algal Preferences in the Masking Behaviour of the Spider Crab, Notomithrax ursus

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    Author
    Ertel, Catherine Monica
    Date
    2008
    Permanent Link
    http://hdl.handle.net/10092/2258
    Thesis Discipline
    Ecology
    Degree Grantor
    University of Canterbury
    Degree Level
    Masters
    Degree Name
    Master of Science

    The purpose of this study was to examine the masking preferences of the spider crab, Notomithrax ursus. The algal composition of the mask in the natural habitat at Kaikoura was examined to determine the general rules the crab follows when decorating itself. The effects of size and sex on the mask composition were examined, as well as determining how the composition of the mask varies by body part. The preference of the crabs was further examined through the use of choice and background change experiments in the laboratory. It was determined that the preference of certain types of algae for mask material is not entirely dependent on their relative abundance in the environment. Possible explanations for this behaviour are given.

    Subjects
    Spider Crabs
     
    Notomithrax ursus
     
    Masking
     
    Decorating
     
    Behaviour
     
    Ecology
    Collections
    • Science: Theses and Dissertations [3440]
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