dc.contributor.author |
Castanon-Cervantes, O |
|
dc.contributor.author |
Battelle, BA |
|
dc.contributor.author |
Fanjul, ML |
|
dc.date.accessioned |
2011-01-22T10:27:39Z |
|
dc.date.accessioned |
2011-01-22T10:27:39Z |
|
dc.date.available |
2011-01-22T10:27:39Z |
|
dc.date.available |
2011-01-22T10:27:39Z |
|
dc.date.issued |
1999 |
|
dc.identifier.issn |
0022-0949 |
|
dc.identifier.uri |
http://hdl.handle.net/11154/2146 |
|
dc.description.abstract |
The present study investigated developmental circadian changes in the content of 5-hydroxytryptamine (5-HT) in two structures proposed to contain pacemakers in crayfish Procambarus clarkii: the cerebral ganglion and the eyestalks. Crayfish (N=260) from three developmental stages were divided into two groups: (1) animals subjected to 12 h:12 h light:dark cycles for 10 days and (2) animals treated as described above, then exposed to 72 h of continuous dim light. Crayfish from both groups were killed at different times of day, and the cerebral ganglion and the eyestalks of each were assayed for 5-HT by reversed-phase HPLC with electrochemical detection. In all stages of development, 5-HT content (expressed as 1 wet mass tissue) showed circadian variations in both structures analyzed |
en_US |
dc.description.abstract |
rhythms continued to free-run under constant illumination, and total 5-HT content was higher in the brain (0.581+/-0.36 mu g g(-1) |
en_US |
dc.description.abstract |
mean +/- S.E.M.) than in the eyestalks (0.299+/-0.15 mu g g(-1)). As development advances, the percentage of the rhythm that shows periods of 24 h diminishes, while the percentage of the rhythm that shows periods of 9 to 12 h increases. This seems to indicate that pulsatile variations in 5-HT content are superimposed in a circadian component. The relationship between the 5-HT rhythm and electroretinogram and motor activity rhythms during development is discussed. |
en_US |
dc.language.iso |
en |
en_US |
dc.title |
rhythmic changes in the serotonin content of the brain and eyestalk of crayfish during development |
en_US |
dc.type |
Article |
en_US |
dc.identifier.idprometeo |
2613 |
|
dc.source.novolpages |
202(20):2823-2830 |
|
dc.subject.wos |
Biology |
|
dc.description.index |
WoS: SCI, SSCI o AHCI |
|
dc.subject.keywords |
serotonin |
|
dc.subject.keywords |
crayfish |
|
dc.subject.keywords |
Procambarus clarkii |
|
dc.subject.keywords |
HPLC |
|
dc.subject.keywords |
circadian rhythm |
|
dc.subject.keywords |
development |
|
dc.relation.journal |
Journal of Experimental Biology |
|