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    Author(s): D.K. Rosenberg; R.G. Anthony
    Date: 1993
    Source: Canadian Journal of Zoology. 71: 660-663
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (214.0 KB)

    Description

    We described trapping mortality rates of northern flying squirrel (Glaucomys sabrinus) populations in western Oregon, U.S.A., and evaluated the effects of sex, age, body mass, and number of times an individual was recaptured on these rates. Although the overall trapping mortality rates were relatively low (7%) during 16-21 day trapping sessions, we observed differential mortality rates among the sex and age cohorts. The order of mortality rates was: juvenile females (32.3 %) > juvenile males (11.1%) > adult females (5.1%) = adult males (4.1%). Overall trapping mortality rates were not affected by the number of times an individual was captured. We hypothesize that the differences we found were due to extrinsic factors (weather-related) acting on differential behavioral responses to trapping and thresholds of stress an animal can tolerate.

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    Citation

    Rosenberg, D.K.; Anthony, R.G. 1993. Differences in trapping mortality rates of northern flying squirrels. Canadian Journal of Zoology 71:660-663

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