"AGE, SEX, AND AGGRESSION IN FLORIDA SANDHILL CRANES" by STEPHEN A. NESBITT

North American Crane Working Group

 

Date of this Version

2005

Document Type

Article

Citation

Nesbitt, S.A. Age, sex and aggression in Florida sandhill cranes. In Chavez-Ramirez, F, ed. 2005. Proceedings of the Ninth North American Crane Workshop, Jan 17-20, 2003. Sacramento, California: North American Crane Working Group. Pp. 237-240.

Comments

Reproduced by permission of the NACWG.

Abstract

Individually directed aggressive interactions were recorded for sandhill cranes in Florida over a 9-year period. Charges and stabs were the most frequently observed aggressive behaviors. Paired adults initiated most of the encounters. Males directed 67% of aggressive interactions toward other males and 84% of female aggressive interactions were directed toward other females. The sex of initiator was significantly correlated with the sex of the receiver (P = 0.001). Paired adults directed most aggression (64.7%) toward other paired adults. Aggression initiated by subadult cranes was directed toward adults and subadults with equal frequency. The aggressiveness in males as an indicator of territoriality may be a means that females may use to assess suitability of potential mates.

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