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Cluster N activity under changed light and magnetic field conditions during the night in Sylvia warblers.

Liedvogel, Miriam LU ; Feenders, G.; Wada, K.; Jarvis, E.D. and Mouritsen, H. (2007) In European Journal of Neuroscience 25(4). p.1166-1173
Abstract
Cluster N is a cluster of forebrain regions found in night-migratory songbirds that shows high activation of activity-dependent gene expression during night-time vision. We have suggested that Cluster N may function as a specialized night-vision area in night-migratory birds and that it may be involved in processing light-mediated magnetic compass information. Here, we investigated these ideas. We found a significant lateralized dominance of Cluster N activation in the right hemisphere of European robins (Erithacus rubecula). Activation predominantly originated from the contralateral (left) eye. Garden warblers (Sylvia borin) tested under different magnetic field conditions and under monochromatic red light did not show significant... (More)
Cluster N is a cluster of forebrain regions found in night-migratory songbirds that shows high activation of activity-dependent gene expression during night-time vision. We have suggested that Cluster N may function as a specialized night-vision area in night-migratory birds and that it may be involved in processing light-mediated magnetic compass information. Here, we investigated these ideas. We found a significant lateralized dominance of Cluster N activation in the right hemisphere of European robins (Erithacus rubecula). Activation predominantly originated from the contralateral (left) eye. Garden warblers (Sylvia borin) tested under different magnetic field conditions and under monochromatic red light did not show significant differences in Cluster N activation. In the fairly sedentary Sardinian warbler (Sylvia melanocephala), which belongs to the same phyolgenetic clade, Cluster N showed prominent activation levels, similar to that observed in garden warblers and European robins. Thus, it seems that Cluster N activation occurs at night in all species within predominantly migratory groups of birds, probably because such birds have the capability of switching between migratory and sedentary life styles. The activation studies suggest that although Cluster N is lateralized, as is the dependence on magnetic compass orientation, either Cluster N is not involved in magnetic processing or the magnetic modulations of the primary visual signal, forming the basis for the currently supported light-dependent magnetic compass mechanism, are relatively small such that activity-dependent gene expression changes are not sensitive enough to pick them up. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
European robin, garden warbler, light-mediated magnetoreception, magnetic compass, night vision
in
European Journal of Neuroscience
volume
25
issue
4
pages
1166 - 1173
publisher
Wiley-Blackwell
external identifiers
  • scopus:33847211098
ISSN
1460-9568
DOI
10.1111/j.1460-9568.2007.05350.x
language
English
LU publication?
no
id
f2df65d2-cde4-483b-8999-7a5dbbc2efc6 (old id 1976917)
date added to LUP
2011-06-14 16:35:07
date last changed
2017-10-01 03:39:52
@article{f2df65d2-cde4-483b-8999-7a5dbbc2efc6,
  abstract     = {Cluster N is a cluster of forebrain regions found in night-migratory songbirds that shows high activation of activity-dependent gene expression during night-time vision. We have suggested that Cluster N may function as a specialized night-vision area in night-migratory birds and that it may be involved in processing light-mediated magnetic compass information. Here, we investigated these ideas. We found a significant lateralized dominance of Cluster N activation in the right hemisphere of European robins (Erithacus rubecula). Activation predominantly originated from the contralateral (left) eye. Garden warblers (Sylvia borin) tested under different magnetic field conditions and under monochromatic red light did not show significant differences in Cluster N activation. In the fairly sedentary Sardinian warbler (Sylvia melanocephala), which belongs to the same phyolgenetic clade, Cluster N showed prominent activation levels, similar to that observed in garden warblers and European robins. Thus, it seems that Cluster N activation occurs at night in all species within predominantly migratory groups of birds, probably because such birds have the capability of switching between migratory and sedentary life styles. The activation studies suggest that although Cluster N is lateralized, as is the dependence on magnetic compass orientation, either Cluster N is not involved in magnetic processing or the magnetic modulations of the primary visual signal, forming the basis for the currently supported light-dependent magnetic compass mechanism, are relatively small such that activity-dependent gene expression changes are not sensitive enough to pick them up.},
  author       = {Liedvogel, Miriam and Feenders, G. and Wada, K. and Jarvis, E.D. and Mouritsen, H.},
  issn         = {1460-9568},
  keyword      = {European robin,garden warbler,light-mediated magnetoreception,magnetic compass,night vision},
  language     = {eng},
  number       = {4},
  pages        = {1166--1173},
  publisher    = {Wiley-Blackwell},
  series       = {European Journal of Neuroscience},
  title        = {Cluster N activity under changed light and magnetic field conditions during the night in Sylvia warblers.},
  url          = {http://dx.doi.org/10.1111/j.1460-9568.2007.05350.x},
  volume       = {25},
  year         = {2007},
}