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- Title
When does bearing magnets affect the size of deflection in clock-shifted homing pigeons?
- Authors
Wiltschko, Roswitha; Wiltschko, Wolfgang
- Abstract
Pigeons whose internal clock is shifted by 6 h show deflections from the direction of untreated controls, yet these deflections are often smaller than predicted. Magnets temporarily disabling the magnetic compass increased these the deflections significantly (R. Wiltschko and Wiltschko ), indicating a compromise between sun compass and magnetic compass. – Recently, Ioalé et al. () claim that they could not replicate our findings. The reason lies in a difference in the behavior of the clock-shifted pigeons without magnets: in the study of Ioalè et al. (), their deflections was already almost as large as that of our pigeons carrying magnets. This difference is probably caused by the limited experience of the pigeons of Ioalè et al. (): Their birds, in contrast to ours, had not used their sun’ compass during extended homing flights at various times of the year and, not having been faced with the necessity to compensate the saisonal changes of the sun’s arc, gave the sun compass more weight than our birds did.
- Subjects
ITALY; HOMING pigeons; ANIMAL homing; SOLAR compass; MAGNETS; TIME; BIRD behavior; ANIMAL flight; BIRD navigation
- Publication
Behavioral Ecology & Sociobiology, 2007, Vol 61, Issue 3, p493
- ISSN
0340-5443
- Publication type
Article
- DOI
10.1007/s00265-006-0276-z