Contact: Diana Yates
University of Illinois at Urbana-Champaign
Caption: The male, threespined stickleback defends its nest against invaders. Researchers tracked changes in gene activity in its brain after it encountered another male near its nest.
Credit: Katie McGhee
Usage Restrictions: Photo may be used only to accompany stories about the research described in this release. Please credit: Katie McGhee.
Related news release: Study Tracks Brain Gene Response to Territorial Aggression