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https://hdl.handle.net/1959.11/8573
Title: | The magnetic compass of domestic chickens, 'Gallus gallus' | Contributor(s): | Wiltschko, W (author); Freire, Rafael (author); Munro, Ursula Hildegard (author); Ritz, T (author); Rogers, Lesley (author) ; Thalau, P (author); Wiltschko, R (author) | Publication Date: | 2007 | DOI: | 10.1242/jeb.004853 | Handle Link: | https://hdl.handle.net/1959.11/8573 | Abstract: | By directional training, young domestic chickens have been shown to use a magnetic compass; the same method has now been used to analyse the functional characteristics and the physical principles underlying the chickens' magnetic compass. Tests in magnetic fields with different intensities revealed a functional window around the intensity of the local geomagnetic field, with this window extending further towards lower than higher intensities. Testing chickens under monochromatic 465 nm blue and 645 nm red light suggested a wavelength dependence, with orientation possible under blue but not under red light. Exposing chickens to an oscillating field of 1.566 MHz led to disorientation, identifying an underlying radical pair mechanism. Local anesthesia of the upper beak, where iron-rich structures have been described as potential magnetoreceptors, did not affect the performance, suggesting that these receptors are not involved in compass orientation. These findings show obvious parallels to the magnetic compass described for European robins, indicating that chickens and small passerines use the same type of magnetic compass mechanism. This suggests that the avian magnetic compass may have evolved in the common ancestor of all present-day birds to facilitate orientation within the home range. | Publication Type: | Journal Article | Source of Publication: | The Journal of Experimental Biology, 210(13), p. 2300-2310 | Publisher: | The Company of Biologists Ltd | Place of Publication: | United Kingdom | ISSN: | 1477-9145 0022-0949 |
Fields of Research (FoR) 2008: | 060899 Zoology not elsewhere classified | Socio-Economic Objective (SEO) 2008: | 970106 Expanding Knowledge in the Biological Sciences | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article School of Science and Technology |
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