Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/20072
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dc.contributor.authorDavie, Andrewen_UK
dc.contributor.authorPorter, Mark J Ren_UK
dc.contributor.authorBromage, Niall Ren_UK
dc.contributor.authorMigaud, Herveen_UK
dc.contributor.authorPorter, Mark J Ren_UK
dc.date.accessioned2014-05-06T23:25:53Z-
dc.date.available2014-05-06T23:25:53Zen_UK
dc.date.issued2007-01en_UK
dc.identifier.urihttp://hdl.handle.net/1893/20072-
dc.description.abstractResearch to date has not clearly defined the role of photoperiod in regulating somatic growth in Atlantic cod (Gadus morhua). The present study followed individual growth performance, plasma insulin-like growth factor-I, and relative liver size in response to a range of experimental photoperiod treatments where populations were transferred from an ambient photoperiod regime to continuous illumination at strategic times during the first 2 years of life. While this work demonstrated that application of continuous illumination could directly stimulate somatic growth, this growth stimulation is transitory with no accumulative effect of prolonged exposure to continuous illumination. Importantly, it was apparent that the photic inhibition of maturation realized a far more significant growth stimulation, and in populations where this occurred, sexually dimorphic growth patterns became apparent. Plasma insulin-like growth factor-I displays a seasonal rhythm correlated with ambient temperature under natural photic conditions and in certain circumstances could be used as an accurate predictor of growth rate. Overall, this work further refines the guidelines on photoperiod management during commercial ongrowing of the species to help realize the maximum economic potential of cod aquaculture.Les travaux de recherche men‚s jusqu'a ce jour n'ont pas permis de d‚finir clairement le r“le jou‚ par la photop‚riode dans la r‚gulation de la croissance somatique chez la morue Atlantique (Gadus morhua). Durant notre ‚tude, nous avons fait un suivi individuel des performances de croissance, analys‚ les teneurs plasmatiques en facteur 1 de croissance de type insulinique et mesur‚ l'indice h‚pato-somatique en r‚ponse … une vari‚t‚ de traitements exp‚rimentaux photop‚riodiques consistant … transf‚rer des populations de morue, … des temps pr‚cis, d'un r‚gime de photop‚riode naturelle vers un ‚clairement continu durant leurs 2 premiŠres ann‚es de vie. Notre ‚tude a d‚montr‚ que, mˆme si des p‚riodes de lumiŠre continue peuvent stimuler directement la croissance somatique chez la morue, cette stimulation n'est que transitoire et n'augmente pas proportionnellement … la dur‚e d'exposition … l'‚clairement continu. Il est important de noter que l'inhibition du cycle de reproduction par le r‚gime de lumiŠre permet une stimulation de la croissance bien plus importante. De plus, chez ces populations rest‚es immatures, on observe un dimorphisme sexuel de croissance. Il existe un rythme saisonnier des teneurs plasmatiques en facteur 1 de croissance de type insulinique corr‚l‚ … la fois aux variations de la temp‚rature de l'eau en conditions naturelles d'‚clairement et, dans certains cas, aux taux de croissance des poissons. D'une fa‡on globale, nos travaux ont permis de d‚terminer avec plus de pr‚cision les r‚gimes photop‚riodiques … appliquer pendant la phase de grossissement par l'industrie de la pisciculture de la morue pour am‚liorer le rendement.en_UK
dc.language.isoenen_UK
dc.publisherNRC Research Pressen_UK
dc.relationDavie A, Porter MJR, Bromage NR, Migaud H & Porter MJR (2007) The role of seasonally altering photoperiod in regulating physiology in Atlantic cod (Gadus morhua). Part II. Somatic growth. Canadian Journal of Fisheries and Aquatic Sciences, 64 (1), pp. 98-112. https://doi.org/10.1139/f06-170en_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.titleThe role of seasonally altering photoperiod in regulating physiology in Atlantic cod (Gadus morhua). Part II. Somatic growthen_UK
dc.typeJournal Articleen_UK
dc.rights.embargodate2995-10-01en_UK
dc.rights.embargoreason[Davie et al CJFAS 64 98-112 2007.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.doi10.1139/f06-170en_UK
dc.citation.jtitleCanadian Journal of Fisheries and Aquatic Sciencesen_UK
dc.citation.issn1205-7533en_UK
dc.citation.issn0706-652Xen_UK
dc.citation.volume64en_UK
dc.citation.issue1en_UK
dc.citation.spage98en_UK
dc.citation.epage112en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusVoR - Version of Recorden_UK
dc.author.emailandrew.davie@stir.ac.uken_UK
dc.citation.date12/04/2011en_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationUniversity of Stirlingen_UK
dc.contributor.affiliationUniversity of Stirlingen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationUniversity of Tasmaniaen_UK
dc.identifier.isiWOS:000244892500009en_UK
dc.identifier.scopusid2-s2.0-34247196695en_UK
dc.identifier.wtid798158en_UK
dc.contributor.orcid0000-0002-9524-618Xen_UK
dc.contributor.orcid0000-0002-5404-7512en_UK
dcterms.dateAccepted2011-04-12en_UK
dc.date.filedepositdate2014-05-06en_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionVoRen_UK
local.rioxx.authorDavie, Andrew|0000-0002-9524-618Xen_UK
local.rioxx.authorPorter, Mark J R|en_UK
local.rioxx.authorBromage, Niall R|en_UK
local.rioxx.authorMigaud, Herve|0000-0002-5404-7512en_UK
local.rioxx.authorPorter, Mark J R|en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate2995-10-01en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/under-embargo-all-rights-reserved||en_UK
local.rioxx.filenameDavie et al CJFAS 64 98-112 2007.pdfen_UK
local.rioxx.filecount1en_UK
local.rioxx.source0706-652Xen_UK
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