Untersuchungen �ber das Orientierungsverm�gen n�chtlich ziehender Rotkehlchen (Erithacus rubecula)

Merkel, Friedrich; Fromme, Hans Georg

doi:10.1007/bf00635576

Cited by 53 publications

(12 citation statements)

References 2 publications

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“…birds: Merkel and Fromme 1958;salamanders: Phillips 1977;fish: Branover et al 1971). Although the influence of magnetism on the orientation of birds is becoming generally accepted, the way in which geomagnetism could be used to facilitate navigation remains obscure.…”

Section: Multi-coordinate Navigationmentioning

confidence: 96%

The orientation and navigation of juvenile alligators: evidence of magnetic sensitivity

Rodda

1984

J. Comp. Physiol.

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Section: Multi-coordinate Navigationmentioning

confidence: 96%

The orientation and navigation of juvenile alligators: evidence of magnetic sensitivity

Rodda

1984

J. Comp. Physiol.

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“…Radical pair reactions were first proposed as a magnetoreceptor by Schulten (18,19), prompted by the findings that avian magnetic orientation is lightdependent-suggesting a photochemical process-and is responsive to the inclination rather than the polarity of the geomagnetic field (20)(21)(22)(23); unlike a magnetic compass needle, birds maintain their orientation when the ambient field vector is reversed (5).…”

mentioning

confidence: 99%

Chemical magnetoreception in birds: The radical pair mechanism

Rodgers

Hore²

2009

Proc. Natl. Acad. Sci. U.S.A.

476

449

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Migratory birds travel vast distances each year, finding their way by various means, including a remarkable ability to perceive the Earth's magnetic field. Although it has been known for 40 years that birds possess a magnetic compass, avian magnetoreception is poorly understood at all levels from the primary biophysical detection events, signal transduction pathways and neurophysiology, to the processing of information in the brain. It has been proposed that the primary detector is a specialized ocular photoreceptor that plays host to magnetically sensitive photochemical reactions having radical pairs as fleeting intermediates. Here, we present a physical chemist's perspective on the ''radical pair mechanism'' of compass magnetoreception in birds. We outline the essential chemical requirements for detecting the direction of an Earth-strength Ϸ50 T magnetic field and comment on the likelihood that these might be satisfied in a biologically plausible receptor. Our survey concludes with a discussion of cryptochrome, the photoactive protein that has been put forward as the magnetoreceptor molecule.

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“…Two such cage types are in common use: an octagonal cage with 8 radially positioned perches developed by Merkel and Fromme (1958) which records the bird's activity by microswitches, and a funnel cage developed by Emlen and Emlen (1966). The latter records the traces left by birds on the inclined walls when they try to escape from the center, either as inky marks or as scratches in typewriter correction paper.…”

Section: Methods Used To Analyse Orientationmentioning

confidence: 99%

Magnetic Orientation and Celestial Cues in Migratory Orientation

Wiltschko

1991

Experientia Supplementum

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Young birds on their first migration possess innate information on the direction of their migration route. It is represented twice, using both celestial rotation and the geomagnetic field as references. These two systems, together with information provided by factors associated with sunset, interact in a complex way to establish the migratory direction. During ontogeny, celestial rotation appears to be dominant; during migration, however, celestial cues appear to be controlled by the magnetic field. -The factors associated with sunset -the view of the setting sun and the characteristic pattern of polarized light -are important secondary cues which seem to derive their directional significance from the magnetic field. Their role appears to be more variable, with possible species-specific differences.During spring migration and later autumn migrations, flying in the migratory direction is complemented by navigational processes which enable the birds to return to a specific home site known from previous stays.

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Untersuchungen �ber das Orientierungsverm�gen n�chtlich ziehender Rotkehlchen (Erithacus rubecula)

Cited by 53 publications

References 2 publications

The orientation and navigation of juvenile alligators: evidence of magnetic sensitivity

The orientation and navigation of juvenile alligators: evidence of magnetic sensitivity

Chemical magnetoreception in birds: The radical pair mechanism

Magnetic Orientation and Celestial Cues in Migratory Orientation

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