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Behavioral Ecology and Sociobiology

, Volume 24, Issue 4, pp 239–243 | Cite as

The effect of prey consumption on territorial defense by harriers: differential responses to neighbors versus floaters

  • E. J. Temeles
Article

Summary

Food consumption may reduce fighting intensity of territory owners by decreasing resource value (additional food cannot be consumed) and/or increasing fighting costs (food in the digestive tract may raise injury risks). A territorial harrier's (Circus cyaneus, adult females) decision to reduce its level of aggression should depend upon whether or not the intruder was a competitor for individual prey items (as are smaller male floaters) or for the territory proper (as are female floaters and especially female neighbors). Accordingly, following meals, aggressive intensity of owners was strongly reduced towards male floaters (more were ignored), slightly reduced towards female floaters (more were called at than chased), and remained unchanged towards neighbors (virtually all were chased). Hence, alterations in aggressive behavior of territory owners following food consumption may depend upon the type of intruder and the resource under contest (a food item or a territory).

Keywords

Aggressive Behavior Food Item Adult Female Food Consumption Digestive Tract 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • E. J. Temeles
    • 1
  1. 1.Department of ZoologyUniversity of TennesseeKnoxvilleUSA

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