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    Testing For Independence of Observations in Animal Movements

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    Slade_1985.pdf (14.84Mb)
    Issue Date
    1985-08-01
    Author
    Swihart, Robert K.
    Slade, Norman A.
    Publisher
    Ecological Society of America
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Rights
    Copyright by the Ecological Society of America
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    Abstract
    Many analyses of animal movements assume that an animal's position at time t + 1 is independent of its position at time t, but no statistical procedure exists to test this assumption with bivariate data. Using empirically derived critical values for the ratio of mean squared distance between successive observations to mean squared distance from the center of activity, we demonstrate a bivariate test of the independence assumption first proposed by Schoener. For cases in which the null hypothesis of independence is rejected, we present a procedure for determining the time interval at which autocorrelation becomes negligible. To illustrate implementation of the test, locational data obtained from a radio-tagged adult female cotton rat (Sigmodon hispidus) were used. The test can be used to design an efficient sampling schedule for movement studies, and it is also useful in revealing behavioral phenomena such as home range shifting and any tendency of animals to follow prescribed routes in their daily activities. Further, the testmay provide a means of examining how an animal's use of space is affected by its internal clock.
    URI
    http://hdl.handle.net/1808/17978
    DOI
    https://doi.org/10.2307/1939170
    Collections
    • Ecology & Evolutionary Biology Scholarly Works [1492]
    Citation
    Swihart, Robert K.; Slade, Norman A. (1985). "Testing For Independence of Observations in Animal Movements." Ecology, 66(4):1176-1184. http://dx.doi.org/10.2307/1939170.

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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