Publication
A behavioral perspective on the biophysics of the light-dependent magnetic compass: a link between directional and spatial perception?
| dc.contributor.author | Phillips, John B. | |
| dc.contributor.author | Muheim, R. | |
| dc.contributor.author | Jorge, P. E. | |
| dc.date.accessioned | 2019-07-24T15:41:51Z | |
| dc.date.available | 2019-07-24T15:41:51Z | |
| dc.date.issued | 2010 | |
| dc.description.abstract | In terrestrial organisms, sensitivity to the Earth's magnetic field is mediated by at least two different magnetoreception mechanisms, one involving biogenic ferromagnetic crystals (magnetite/maghemite) and the second involving a photo-induced biochemical reaction that forms long-lasting, spin-coordinated, radical pair intermediates. In some vertebrate groups (amphibians and birds), both mechanisms are present; a light-dependent mechanism provides a directional sense or 'compass', and a non-light-dependent mechanism underlies a geographical-position sense or 'map'. Evidence that both magnetite- and radical pair-based mechanisms are present in the same organisms raises a number of interesting questions. Why has natural selection produced magnetic sensors utilizing two distinct biophysical mechanisms? And, in particular, why has natural selection produced a compass mechanism based on a light-dependent radical pair mechanism (RPM) when a magnetite-based receptor is well suited to perform this function? Answers to these questions depend, to a large degree, on how the properties of the RPM, viewed from a neuroethological rather than 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 surroundings. We suggest that the light-dependent magnetic compass may serve not only as a source of directional information but also provide a spherical coordinate system that helps to interface metrics of distance, direction and spatial position. | pt_PT |
| dc.description.sponsorship | National Science Foundation, USA IOB 06-47188 ; IOB 07-48175 | pt_PT |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.citation | The Journal of Experimental Biology 213, 3247-3255. | pt_PT |
| dc.identifier.doi | 10.1242/jeb.020792 | pt_PT |
| dc.identifier.issn | 1477-9145 | |
| dc.identifier.uri | http://hdl.handle.net/10400.12/7127 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | The Company of Biologists | pt_PT |
| dc.relation.publisherversion | https://jeb.biologists.org/content/213/19/3247 | pt_PT |
| dc.subject | Amphibians | pt_PT |
| dc.subject | Animals | pt_PT |
| dc.subject | Behavior, Animal | pt_PT |
| dc.subject | Biophysical Phenomena | pt_PT |
| dc.subject | Birds | pt_PT |
| dc.subject | Light | pt_PT |
| dc.subject | Models, Biological | pt_PT |
| dc.subject | Orientation | pt_PT |
| dc.subject | Rodentia | pt_PT |
| dc.subject | Spatial Behavior | pt_PT |
| dc.subject | Visual Perception | pt_PT |
| dc.subject | Magnetics | pt_PT |
| dc.title | A behavioral perspective on the biophysics of the light-dependent magnetic compass: a link between directional and spatial perception? | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Cambridge | pt_PT |
| oaire.citation.endPage | 3255 | pt_PT |
| oaire.citation.issue | 19 | pt_PT |
| oaire.citation.startPage | 3247 | pt_PT |
| oaire.citation.title | Journal of Experimental Biology | pt_PT |
| oaire.citation.volume | 213 | pt_PT |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | article | pt_PT |