Advanced Search
MyIDEAS: Login

Attack-based indices, not movement patterns, reveal intraspecific variation in foraging behavior

Contents:

Author Info

  • Steven C. Williams
  • Lance D. McBrayer
Registered author(s):

    Abstract

    In lizards, much of the research on foraging patterns has regarded foraging behavior as static within species and has quantified foraging based on movement patterns alone. Sole use of movement patterns has been recognized as problematic because movements are often related to activities other than foraging (e.g., reproduction). Consequently, intraspecific variation in foraging behavior and its ecological consequences (e.g., diet variation) have been dramatically under studied. In this study, we examined the foraging behavior and diet of the Florida scrub lizard (Sceloporus woodi). Our objectives were 1) to quantify the variation in foraging behavior through the activity season to document how movement and foraging varies between sexes across the breeding and post-breeding seasons, 2) to quantify the efficacy of movement patterns versus attack-based metrics in detecting variation, and 3) to quantify the dietary consequences of variation in foraging. We found no differences in movement patterns between seasons or sexes, but we did find sexual variation in attack behavior and corresponding seasonal and sexual variation in diet. Indeed, a new attack-based index, attacks while stationary (AWS), was able to show precisely how foraging patterns varied. Combining attack-based indices and lag sequential analysis provided a complete description of how prey was acquired compared with using movement patterns alone. Our results provide a cautionary note for future researchers; focusing solely on movement patterns and/or ignoring seasonal and sexual variation in foraging behavior misses ecologically relevant variation that is highly informative about the causes and consequences of changes in foraging behavior. Copyright 2011, Oxford University Press.

    Download Info

    If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
    File URL: http://hdl.handle.net/10.1093/beheco/arr082
    Download Restriction: Access to full text is restricted to subscribers.

    As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.

    Bibliographic Info

    Article provided by International Society for Behavioral Ecology in its journal Behavioral Ecology.

    Volume (Year): 22 (2011)
    Issue (Month): 5 ()
    Pages: 993-1002

    as in new window
    Handle: RePEc:oup:beheco:v:22:y:2011:i:5:p:993-1002

    Contact details of provider:
    Postal: Oxford University Press, Great Clarendon Street, Oxford OX2 6DP, UK
    Fax: 01865 267 985
    Email:
    Web page: http://beheco.oxfordjournals.org/

    Order Information:
    Web: http://www.oup.co.uk/journals

    Related research

    Keywords:

    References

    No references listed on IDEAS
    You can help add them by filling out this form.

    Citations

    Lists

    This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

    Statistics

    Access and download statistics

    Corrections

    When requesting a correction, please mention this item's handle: RePEc:oup:beheco:v:22:y:2011:i:5:p:993-1002. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Oxford University Press) or (Christopher F. Baum).

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If references are entirely missing, you can add them using this form.

    If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.