Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/19667
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dc.contributor.authorVera, LMen_UK
dc.contributor.authorLopez-Olmeda, Jose Fen_UK
dc.contributor.authorBayarri, Maria Joseen_UK
dc.contributor.authorMadrid, Juan Antonioen_UK
dc.contributor.authorSanchez-Vazquez, F Javieren_UK
dc.date.accessioned2014-03-28T23:35:41Z-
dc.date.available2014-03-28T23:35:41Zen_UK
dc.date.issued2005en_UK
dc.identifier.urihttp://hdl.handle.net/1893/19667-
dc.description.abstractMelatonin production by the pineal organ is influenced by light intensity, as has been described in most vertebrate species, in which melatonin is considered a synchronizer of circadian rhythms. In tench, strict nocturnal activity rhythms have been described, although the role of melatonin has not been clarified. In this study we investigated daily activity and melatonin rhythms under 1212 light‐dark (LD) conditions with two different light intensities (58.6 and 1,091 µW/cm2), and the effect of 1 h broad spectrum white light pulses of different intensities (3.3, 5.3, 10.5, 1,091.4 µW/cm2) applied at middarkness (MD) on nocturnal circulating melatonin. The results showed that plasma melatonin in tench under LD 1212 and high light conditions displayed rhythmic variation, where values at MD (255.8±65.9 pg/ml) were higher than at midlight (ML) (70.7±31.9 pg/ml). Such a difference between MD and ML values was reduced in animals exposed to LD 1212 and low light intensity. The application of 1 h light pulses at MD lowered plasma melatonin to 111.6±3.2 pg/ml (in the 3.3-10.5 µW/cm2 range) and to 61.8±18.3 pg/ml (with the 1,091.4 µW/cm2 light pulse) and totally suppressed nocturnal locomotor activity. These results show that melatonin rhythms persisted in tench exposed to low light intensity although the amplitude of the rhythm is affected. In addition, it was observed that light pulses applied at MD affected plasma melatonin content and locomotor activity. Such a low threshold suggests that the melatonin system is capable of transducing light even under dim conditions, which may be used by this nocturnal fish to synchronize to weak night light signals (e.g., moonlight cycles).Read More: http://informahealthcare.com/doi/abs/10.1081/CBI-200038157en_UK
dc.language.isoenen_UK
dc.publisherInforma Healthcareen_UK
dc.relationVera L, Lopez-Olmeda JF, Bayarri MJ, Madrid JA & Sanchez-Vazquez FJ (2005) Influence of light intensity on plasma melatonin and locomotor activity rhythms in tench. Chronobiology International, 22 (1), pp. 67-78. https://doi.org/10.1081/CBI-200038157en_UK
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.rights.urihttp://www.rioxx.net/licenses/under-embargo-all-rights-reserveden_UK
dc.subjectTinca tincaen_UK
dc.subjectlight intensityen_UK
dc.subjectmelatoninen_UK
dc.subjectlocomotor activityen_UK
dc.subjectlight pulseen_UK
dc.subjectcircadian rhythmen_UK
dc.titleInfluence of light intensity on plasma melatonin and locomotor activity rhythms in tenchen_UK
dc.typeJournal Articleen_UK
dc.rights.embargodate3000-12-01en_UK
dc.rights.embargoreason[Vera_et_al_2005_tench.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.identifier.doi10.1081/CBI-200038157en_UK
dc.citation.jtitleChronobiology Internationalen_UK
dc.citation.issn1525-6073en_UK
dc.citation.issn0742-0528en_UK
dc.citation.volume22en_UK
dc.citation.issue1en_UK
dc.citation.spage67en_UK
dc.citation.epage78en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusVoR - Version of Recorden_UK
dc.author.emailluisa.veraandujar@stir.ac.uken_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationUniversity of Murciaen_UK
dc.contributor.affiliationUniversity of Murciaen_UK
dc.contributor.affiliationUniversity of Murciaen_UK
dc.contributor.affiliationUniversity of Murciaen_UK
dc.identifier.isiWOS:000228815300006en_UK
dc.identifier.scopusid2-s2.0-17244373452en_UK
dc.identifier.wtid648908en_UK
dc.contributor.orcid0000-0003-0999-055Xen_UK
dcterms.dateAccepted2005-12-31en_UK
dc.date.filedepositdate2014-03-28en_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionVoRen_UK
local.rioxx.authorVera, LM|0000-0003-0999-055Xen_UK
local.rioxx.authorLopez-Olmeda, Jose F|en_UK
local.rioxx.authorBayarri, Maria Jose|en_UK
local.rioxx.authorMadrid, Juan Antonio|en_UK
local.rioxx.authorSanchez-Vazquez, F Javier|en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate3000-12-01en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/under-embargo-all-rights-reserved||en_UK
local.rioxx.filenameVera_et_al_2005_tench.pdfen_UK
local.rioxx.filecount1en_UK
local.rioxx.source0742-0528en_UK
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