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Physiology

Charles J. Amlaner

Aggressive communication & defense strategies & postures

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Full-Text Articles in Biochemistry, Biophysics, and Structural Biology

Aggressive Communication By Larus Glaucescens. Part Vi: Interactions Of Territory Residents With A Remotely Controlled, Locomotory Model, Charles Amlaner Dec 1977

Aggressive Communication By Larus Glaucescens. Part Vi: Interactions Of Territory Residents With A Remotely Controlled, Locomotory Model, Charles Amlaner

Charles J. Amlaner

Observations and experiments on aggressive communication by Larus glaucescens gulls were conducted on Colville Island in 1974. The colony contains approximately 1,800 breeding pairs of Ss. Defenders maintaining a territory utilized defense strategies when responding to a locomotory model. Model directional movement, body posture, and orientation were highly correlated with subsequent behavioral response by the defender. Directional model movement caused an immediate position adjustment by the defender in most cases. The sex of defending birds interacting with the model was not distributed randomly. Males interacted more than females. Evidence supports the observation that male defenders are more aggressive than ...