Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Brian L. Herting; James R. Belthoff
    Date: 1997
    Source: In: Duncan, James R.; Johnson, David H.; Nicholls, Thomas H., eds. Biology and conservation of owls of the Northern Hemisphere: 2nd International symposium. Gen. Tech. Rep. NC-190. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 213-217.
    Publication Series: General Technical Report (GTR)
    Station: North Central Research Station
    PDF: View PDF  (80.84 KB)

    Description

    Using a hormone implant protocol, we created treatment groups in which circulating levels of testosterone (T) were increased, decreased, or maintained at normal levels (controls) in male Western Screech-owls (Otus kennicottii). Owls were exposed to tape-recorded vocalizations of a conspecific, to which territory holders responded with aggression. Several measures of the intensity of aggression (e.g., approach and vocal behavior) provided the basis for comparisons among treatment groups. Exogenous T elicited increased aggression during the breeding and nonbreeding seasons. Although male owls remained sensitive to exogenous T during the nonbreeding season, aggression also occurred in the absence of circulating T at this time.

    Publication Notes

    • Check the Northern Research Station web site to request a printed copy of this publication.
    • Our on-line publications are scanned and captured using Adobe Acrobat.
    • During the capture process some typographical errors may occur.
    • Please contact Sharon Hobrla, shobrla@fs.fed.us if you notice any errors which make this publication unusable.
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Herting, Brian L.; Belthoff, James R. 1997. Testosterone, aggression, and territoriality in male Western Screech-owls (Otus kennicottii): results from preliminary experiments. In: Duncan, James R.; Johnson, David H.; Nicholls, Thomas H., eds. Biology and conservation of owls of the Northern Hemisphere: 2nd International symposium. Gen. Tech. Rep. NC-190. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 213-217.

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/15483