Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/2220
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dc.contributor.authorLeclercq, Ericen_UK
dc.contributor.authorTaylor, Johnen_UK
dc.contributor.authorHunter, Dougieen_UK
dc.contributor.authorMigaud, Herveen_UK
dc.date.accessioned2017-07-13T00:19:11Z-
dc.date.available2017-07-13T00:19:11Z-
dc.date.issued2010-03-23en_UK
dc.identifier.urihttp://hdl.handle.net/1893/2220-
dc.description.abstractBody size dimorphism between immature and early sexually recruited cohorts of farmed Scottish Atlantic salmon were investigated with the view to optimize the practical management of early maturation over the second-year at sea. Mixed-sex smolts from a single strain and freshwater source were stocked into four discrete commercial sites and sampled at harvest from June to December 2007, 15 to 22 months post-sea transfer. Individuals were sexed and their maturity status determined based on gonado-somatic-index (GSI) and oocyte leading stage. Whole body weight (BW), fork length (FL) and Fulton condition factor (K) were measured and flesh quality analyzed. The immature mixed-sex population and each gender analyzed separately had an isometric weight-length relationship (WLR) but exhibited seasonal variations in K. Body size of immature Atlantic salmon were consistently sexually dimorphic with males exhibiting a higher BW (+13.4%) and FL (+5.9%) but a lower K (-5.0%) than females. Individuals at an early stage of sexual maturation had a significantly higher BW (+35.2%) and K (+20.6%) than the immature cohort in June and July. During this period BW, FL and K together or BW alone were strong and standard indicators of early maturity in our discrete sites. Body size dimorphism described in this study show that sex-ratio is an important parameter of farmed Atlantic salmon populations which is likely to vary following weight-grading and that population composition (sex-ratio and maturation rate) affects the seasonality in K typically observed at harvest. Importantly, the commitment of Atlantic salmon into maturation in spring can be rapidly and accurately estimated in a number of discrete populations by using simple weight-length morphological indicators characterized in a single rearing unit. Following maturation rate estimation, weight-grading implemented according to the predicted stock morphological structure could be used to selectively harvest a high proportion of maturing individuals at a stage where their flesh quality remains optimal. This could be applied as a powerful and practical on-site maturation management tool in the salmon industry as well as in other commercially important fish species.en_UK
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.relationLeclercq E, Taylor J, Hunter D & Migaud H (2010) Body size dimorphism of sea-reared Atlantic salmon (Salmo salar L.): implications for the management of sexual maturation and harvest quality. Aquaculture, 301 (1-4), pp. 47-56. https://doi.org/10.1016/j.aquaculture.2010.01.029en_UK
dc.rightsPublisher policy allows the posting of manuscript versions of articles in this repository. Leclercq E, Taylor J, Hunter D & Migaud H (2010) Body size dimorphism of sea-reared Atlantic salmon (Salmo salar L.): implications for the management of sexual maturation and harvest quality, Aquaculture, 301 (1-4), pp. 47-56. http://dx.doi.org/10.1016/j.aquaculture.2010.01.029en_UK
dc.rights.urihttp://www.rioxx.net/licenses/under-embargo-all-rights-reserveden_UK
dc.subjectAtlantic salmonen_UK
dc.subjectdimorphismen_UK
dc.subjectsexual maturationen_UK
dc.subjectpredictionen_UK
dc.subjectweight-gradingen_UK
dc.subjectstock managementen_UK
dc.subjectaquacultureen_UK
dc.subjectAtlantic salmonen_UK
dc.subjectAtlantic salmon Conservationen_UK
dc.titleBody size dimorphism of sea-reared Atlantic salmon (Salmo salar L.): implications for the management of sexual maturation and harvest qualityen_UK
dc.typeJournal Articleen_UK
dc.rights.embargodate2999-12-05en_UK
dc.identifier.doi10.1016/j.aquaculture.2010.01.029en_UK
dc.citation.jtitleAquacultureen_UK
dc.citation.issn0044-8486en_UK
dc.citation.volume301en_UK
dc.citation.issue1-4en_UK
dc.citation.spage47en_UK
dc.citation.epage56en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusAM - Accepted Manuscripten_UK
dc.author.emaillecleric@yahoo.fren_UK
dc.citation.date04/02/2010en_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationMowi (Scotland)en_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.identifier.isiWOS:000276086900007en_UK
dc.identifier.scopusid2-s2.0-77249171668en_UK
dc.identifier.wtid838264en_UK
dc.contributor.orcid0000-0003-4370-7922en_UK
dc.contributor.orcid0000-0002-5404-7512en_UK
dc.date.accepted2010-01-28en_UK
dcterms.dateAccepted2010-01-28en_UK
dc.date.filedepositdate2010-04-21en_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionAMen_UK
local.rioxx.authorLeclercq, Eric|en_UK
local.rioxx.authorTaylor, John|0000-0003-4370-7922en_UK
local.rioxx.authorHunter, Dougie|en_UK
local.rioxx.authorMigaud, Herve|0000-0002-5404-7512en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate2999-12-05en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/under-embargo-all-rights-reserved||en_UK
local.rioxx.filenameLeclercqetal2010finalMS.pdfen_UK
local.rioxx.filecount1en_UK
local.rioxx.source0044-8486en_UK
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