Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Determinants of agonistic interactions in California sea lions

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Behaviour

California sea lions aggregate in high density colonies during the breeding season. Competition for space and mates results in agonistic interactions that may have long-term population consequences. We explored how demographic, behavioral, and environmental variables influence the rate of agonistic interactions in male and female California sea lions at three breeding colonies with varying population trends and distributed across a wide latitudinal gradient within the Gulf of California, Mexico. Our results indicate that male agonistic interactions are related to environmental and spatial parameters, whereas female interactions are related to male interactions, operational sex ratio (OSR) and environmental parameters. Most demographic and environmental parameters were inversely related to rates of agonistic interactions, with the exception of positive relationships between agonistic interactions and territory size for males and OSR for females. In addition, the highest overall rates of aggression were associated with a declining population. Our findings suggest agonistic interactions may be useful in assessing population dynamics, but additional research is needed to identify mechanistic relationships.

Affiliations: 1: School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA; Wildlife Conservation Society, Northern Rockies Field Office, University of Montana, Division of Biological Sciences, Missoula, MT 59812-4824, USA; 2: School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Behaviour — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation