Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/17887
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dc.contributor.authorSkulstad, Ole Fredriken_UK
dc.contributor.authorTaylor, Johnen_UK
dc.contributor.authorDavie, Andrewen_UK
dc.contributor.authorMigaud, Herveen_UK
dc.contributor.authorKristiansen, Tore Sen_UK
dc.contributor.authorMayer, Ianen_UK
dc.contributor.authorTaranger, Geir Lasseen_UK
dc.contributor.authorOlsen, Rolf Een_UK
dc.contributor.authorKarlsen, Orjanen_UK
dc.date.accessioned2017-08-24T23:52:43Z-
dc.date.available2017-08-24T23:52:43Zen_UK
dc.date.issued2013-11en_UK
dc.identifier.urihttp://hdl.handle.net/1893/17887-
dc.description.abstractTwo studies were performed to study the effect of different light intensities on melatonin secretory profiles in Atlantic cod (Gadus morhua L.). In an indoor tank study, plasma melatonin profiles were measured over a 24-hour cycle in juvenile Atlantic cod reared under a 12 h light:12 h dark photoperiod, having either a high or low daytime light intensity (15.5 or 0.16 μE·cm- 2·s- 1). In a second study, plasma melatonin levels were measured in Atlantic cod kept in traps at three depths (4, 9 and 14 m) in a large sea cage following exposure to the following five experimental light regimes: (1) natural light (NL), (2) NL + artificial constant light (LL) at 2, 7 and 12 m depth, (3) NL + LL at 2 or 12 m, (4) NL + LL at 2 m and (5) NL + LL at 2 m together with additional surface shading. The vertical distribution of free swimming Atlantic cod in the same sea cage was monitored using hydroacoustics. In the tank experiment, diurnal plasma melatonin profiles were similar under low and high light intensity, remaining low during the light period, then increasing rapidly within 15-30 min of lights off, before peaking around midnight. In the sea cage experiment, fish under NL showed a similar diurnal rhythm in plasma melatonin levels, with high melatonin levels during the dark period, although at sunrise melatonin levels started to fall earlier in fish kept at 4 m depth compared to fish kept at 9 and 14 m. Overall, melatonin profiles were most effectively reduced, in terms of relative (day/night) plasma levels, in those fish sampled at the deepest depth (14 m). Relative plasma melatonin levels were correlated to the distance from the artificial light source and the intensity of the ambient light. Dispersed light (lamps at 2, 7 and 12 m) was the most effective light regime for inhibiting the nocturnal rise in plasma melatonin ratios in fish sampled at all three depths. Finally, exposure to the different light regimes did not influence the vertical distribution of Atlantic cod within the sea cage, which consistently remained close to the bottom of the cage.en_UK
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.relationSkulstad OF, Taylor J, Davie A, Migaud H, Kristiansen TS, Mayer I, Taranger GL, Olsen RE & Karlsen O (2013) Effects of light regime on diurnal plasma melatonin levels and vertical distribution in farmed Atlantic cod (Gadus morhua L.). Aquaculture, 414-415, pp. 280-287. https://doi.org/10.1016/j.aquaculture.2013.08.007en_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.subjectLight intensityen_UK
dc.subjectLight perceptionen_UK
dc.subjectLight positionen_UK
dc.subjectMaturationen_UK
dc.subjectPhotoperioden_UK
dc.titleEffects of light regime on diurnal plasma melatonin levels and vertical distribution in farmed Atlantic cod (Gadus morhua L.)en_UK
dc.typeJournal Articleen_UK
dc.rights.embargodate2999-12-31en_UK
dc.rights.embargoreason[1-s2.0-S0044848613004055-main.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.doi10.1016/j.aquaculture.2013.08.007en_UK
dc.citation.jtitleAquacultureen_UK
dc.citation.issn0044-8486en_UK
dc.citation.volume414-415en_UK
dc.citation.spage280en_UK
dc.citation.epage287en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusVoR - Version of Recorden_UK
dc.author.emailherve.migaud@stir.ac.uken_UK
dc.contributor.affiliationMatre Aquaculture Research Stationen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationNorwegian Institute of Marine Researchen_UK
dc.contributor.affiliationNorwegian School of Veterinary Scienceen_UK
dc.contributor.affiliationNorwegian Institute of Marine Researchen_UK
dc.contributor.affiliationMatre Aquaculture Research Stationen_UK
dc.contributor.affiliationNorwegian Institute of Marine Researchen_UK
dc.identifier.isiWOS:000326164600036en_UK
dc.identifier.scopusid2-s2.0-84883676700en_UK
dc.identifier.wtid674687en_UK
dc.contributor.orcid0000-0003-4370-7922en_UK
dc.contributor.orcid0000-0002-9524-618Xen_UK
dc.contributor.orcid0000-0002-5404-7512en_UK
dc.date.accepted2013-08-07en_UK
dcterms.dateAccepted2013-08-07en_UK
dc.date.filedepositdate2013-12-13en_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionVoRen_UK
local.rioxx.authorSkulstad, Ole Fredrik|en_UK
local.rioxx.authorTaylor, John|0000-0003-4370-7922en_UK
local.rioxx.authorDavie, Andrew|0000-0002-9524-618Xen_UK
local.rioxx.authorMigaud, Herve|0000-0002-5404-7512en_UK
local.rioxx.authorKristiansen, Tore S|en_UK
local.rioxx.authorMayer, Ian|en_UK
local.rioxx.authorTaranger, Geir Lasse|en_UK
local.rioxx.authorOlsen, Rolf E|en_UK
local.rioxx.authorKarlsen, Orjan|en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate2999-12-31en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/under-embargo-all-rights-reserved||en_UK
local.rioxx.filename1-s2.0-S0044848613004055-main.pdfen_UK
local.rioxx.filecount1en_UK
local.rioxx.source0044-8486en_UK
Appears in Collections:Aquaculture Journal Articles

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