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Journal of Experimental Biology 116,109-120 (1985)
Published by Company of Biologists 1985

Methods for Producing Disturbances in Pigeon Homing Behaviour by Oscillating Magnetic Fields

PAOLO IOALE' 1 and DANTE GUIDARINI 2

1 Istituto di Biologia generate dell'Università di Pisa, via A. Volta, 6,156100 Pisa and lstituto di Neurvfisiobgia del C.N.R., Via S. Zeno, 51,156100 Pisa, Italy
2 Istituto di Chimica analitica strumentale del C.N.R., via del Risorgimento, 35, 156100 Pisa, Italy

Experiments were performed with homing pigeons treated before release with oscillating magnetic fields produced by small Helmholtz coils placed around the neck and on the head of the pigeon or by larger Helmholtz coils surrounding the cage of the birds. In both types of treatment, which both used a single frequency of about 0.14 Hz, the pigeons' initial orientation was strongly affected when the oscillation of the artificial magnetic field was square-shaped, whereas a triangular or sine-shaped variation had no effect.

Key words: Pigeon, homing, magnetic disturbances

Accepted on September 6, 1984






© The Company of Biologists Ltd 1985