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Keywords: Magnetic compass
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Journal Articles
J Exp Biol (2022) 225 (16): jeb243631.
Published: 23 August 2022
... do not calibrate their compass systems even if they have access to a view of the sky and stars during cue-conflict treatments. Bird migration Animal orientation and navigation Compass calibration Magnetic compass Celestial cues Hierarchy of compass systems Russian Foundation...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (3): jeb237875.
Published: 9 February 2021
... establish their star compass in spring of the year following their first autumn migration or later. Bird migration Orientation Compass systems Celestial cues Magnetic compass Migratory birds Emlen funnels Migratory birds can use three different compass systems to determine...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (5): jeb196469.
Published: 11 March 2019
... associated with magnetic field perception and compass calibration. Behavioural experiments Magnetic compass Magnetic sense Movement patterns Geomagnetic field Many animals are known to have a magnetic sense and to use the geomagnetic field for orientation and navigation ( Wiltschko...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (23): 4221–4224.
Published: 1 December 2014
...Christine Nießner; Susanne Denzau; Leo Peichl; Wolfgang Wiltschko; Roswitha Wiltschko Cryptochrome 1a, located in the UV/violet-sensitive cones in the avian retina, is discussed as receptor molecule for the magnetic compass of birds. Our previous immunohistochemical studies of chicken retinae...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (16): 3143–3147.
Published: 15 August 2013
... and tested again 1 week later, the chicks that had not shown a directional preference on days 5 to 7 continued to search randomly, while the chicks tested from day 8 onward preferred the correct magnetic axis when tested 1 week later. The observation that the magnetic compass is not functional before day 8...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (8): 1381–1387.
Published: 15 April 2013
... by the birds was measured. We found no recalibration of the magnetic compass after pre-exposure to a cue conflict between the natural magnetic field and the artificially shifted polarization pattern at sunset. The lacking difference in the departure direction of both groups may suggest that birds did...
Journal Articles
J Exp Biol (2011) 214 (18): 3096–3101.
Published: 15 September 2011
...Roswitha Wiltschko; Susanne Denzau; Dennis Gehring; Peter Thalau; Wolfgang Wiltschko SUMMARY The avian magnetic compass is an inclination compass that appears to be based on radical pair processes. It requires light from the short-wavelength range of the spectrum up to 565 nm green light; under...
Includes: Supplementary data
Journal Articles
J Exp Biol (2010) 213 (19): 3247–3255.
Published: 1 October 2010
... a biophysical perspective, differ from those of a magnetite-based magnetic compass. The RPM is expected to produce a light-dependent, 3-D pattern of response that is axially symmetrical and, in some groups of animals, may be perceived as a pattern of light intensity and/or color superimposed on the visual...
Includes: Supplementary data
Journal Articles
J Exp Biol (2009) 212 (21): 3466–3472.
Published: 1 November 2009
...Rachel Muheim; John B. Phillips; Mark E. Deutschlander SUMMARY The interaction and hierarchy of celestial and magnetic compass cues used by migratory songbirds for orientation has long been the topic of an intense debate. We have previously shown that migratory Savannah sparrows, Passerculus...
Journal Articles
J Exp Biol (2008) 211 (20): 3344–3350.
Published: 15 October 2008
...Roswitha Wiltschko; Ursula Munro; Hugh Ford; Katrin Stapput; Wolfgang Wiltschko SUMMARY Magnetic compass orientation in migratory birds has been shown to be based on radical pair processes and to require light from the short wavelength part of the spectrum up to 565 nm Green. Under dim red light...
Includes: Supplementary data
Journal Articles
J Exp Biol (2007) 210 (13): 2300–2310.
Published: 1 July 2007
...Wolfgang Wiltschko; Rafael Freire; Ursula Munro; Thorsten Ritz; Lesley Rogers; Peter Thalau; Roswitha Wiltschko SUMMARY 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...
Journal Articles
J Exp Biol (2006) 209 (1): 2–17.
Published: 1 January 2006
... of earlier authors, our analyses suggest that during the premigratory season, celestial information is given the greatest salience and used to recalibrate the magnetic compass by both juvenile and adult birds. Sunset polarized light patterns from the region of the sky near the horizon appear to provide...
Journal Articles
J Exp Biol (2004) 207 (7): 1241–1248.
Published: 1 March 2004
...Martin Vácha; Helena Soukopová SUMMARY There is evidence for both light-dependent and light-independent mechanisms of magnetoreception of terrestrial animals. One example of a light-independent mechanism frequently cited is the magnetic compass of the mealworm beetle( Tenebrio molitor ). We found...
Journal Articles
J Exp Biol (2004) 207 (7): 1193–1202.
Published: 1 March 2004
...Wolfgang Wiltschko; Andrea Möller; Marcus Gesson; Catrin Noll; Roswitha Wiltschko SUMMARY In previous experiments, migratory birds had been disoriented under 635 nm red light, apparently unable to use their magnetic compass. The present study with European robins, Erithacus rubecula , confirms...
Journal Articles
J Exp Biol (2002) 205 (24): 3845–3856.
Published: 15 December 2002
...Rachel Muheim; Johan Bäckman; Susanne Åkesson SUMMARY Magnetic compass orientation in birds has been shown to be light dependent. Results from behavioural studies indicate that magnetoreception capabilities are disrupted under light of peak wavelengths longer than 565 nm, and shifts...
Journal Articles
J Exp Biol (2001) 204 (19): 3295–3302.
Published: 1 October 2001
... that are different from those of vision, suggesting that light-dependent magnetoreception may involve receptors and neuronal pathways of its own. *e-mail: wiltschko@zoology.uni-frankfurt.de 9 7 2001 © The Company of Biologists Limited 2001 2001 magnetic compass magnetoreception radical...