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dc.contributor.authorTaylor, Johnen_UK
dc.contributor.authorBozzolla, Pierreen_UK
dc.contributor.authorFrenzl, Benedikten_UK
dc.contributor.authorMatthew, Chessoren_UK
dc.contributor.authorHunter, Dougieen_UK
dc.contributor.authorMigaud, Herveen_UK
dc.description.abstractUsing sterile triploid salmon is of interest to fish farmers as a means to mitigate interbreeding between farmed and wild fish, prevent pre-harvest maturation and offer potential for faster growth. We investigated within the same experiment whether growth, deformity and cataract prevalence in diploid and triploid Atlantic salmon post-smolts (8 full-sib families) were influenced by isolated- or mixed-ploidy rearing during 12 months of sea water grow-out in tanks until harvest. Diploids attained significantly higher harvest weights than triploids in both treatments (+ 6.7% isolated, + 26.3% mixed). Triploid harvest weight was 29.6% lower under mixed ploidy rearing than their isolated triploid siblings. A similar effect was also observed in diploids (12% lower harvest weight). Family had a significant effect on harvest weight in both ploidy. However, family harvest weight in triploids showed a linear relationship between isolated and mixed rearing (r2 = 0.76), while a non-linear relationship was found between diploids reared in isolation or mixed populations (r2 = 0.88). Furthermore diploid family weight correlated positively with triploid weight in isolation (r2 = 0.65), but a non-significant relationship was observed under mixed rearing (r2 = 0.49). Diploids had a significantly higher condition (K) factor at harvest than triploids in both treatments, while triploid K factor was significantly reduced by mixed rearing with diploids. Triploids had a significantly higher incidence of cataract than diploids in both treatments (60.9-77.3% vs. 21.7-47.2%, severity ≥ 1). However, severity of cataract was greater in both triploids (2.43) and diploids (1.44) grown in isolation than those grown in a mixed ploidy population (triploid 2.17; diploid 1.09). Triploids had a significantly higher prevalence of visible deformity than diploids (18.1 vs. 7.2%), however, triploids grown in isolation had significantly higher prevalence than triploids under mixed rearing (30.4 vs. 5.8%). Collectively, the results provide clear evidence that triploids perform very differently when reared in the presence or absence of diploid conspecifics. Furthermore, observations of reduced deformity and cataract in the slower growing mixed populations support the hypothesis that such malformations are in part a function of higher growth rate. The results of this study also indicate that care should be taken when designing conventional common garden experiments to evaluate family performance between ploidy as interactions between ploidy may influence growth traits, although family effects appear to remain consistent.en_UK
dc.relationTaylor J, Bozzolla P, Frenzl B, Matthew C, Hunter D & Migaud H (2014) Triploid Atlantic salmon growth is negatively affected by communal ploidy rearing during seawater grow-out in tanks. Aquaculture, 432, pp. 163-174.
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.subjectCommunal rearingen_UK
dc.titleTriploid Atlantic salmon growth is negatively affected by communal ploidy rearing during seawater grow-out in tanksen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[Taylor et al 2014b.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.type.statusVoR - Version of Recorden_UK
dc.contributor.funderMarine Harvest (Scotland) Ltden_UK
dc.contributor.funderBiomar Ltden_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationUniversity of Stirlingen_UK
dc.contributor.affiliationUniversity of Stirlingen_UK
dc.contributor.affiliationMowi (Scotland)en_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.relation.funderprojectSALMOTRIP +en_UK
rioxxterms.apcnot requireden_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorTaylor, John|0000-0003-4370-7922en_UK
local.rioxx.authorBozzolla, Pierre|en_UK
local.rioxx.authorFrenzl, Benedikt|en_UK
local.rioxx.authorMatthew, Chessor|en_UK
local.rioxx.authorHunter, Dougie|en_UK
local.rioxx.authorMigaud, Herve|0000-0002-5404-7512en_UK
local.rioxx.projectUoS-BioMar-MH(07-02-2013)|Biomar Ltd|en_UK
local.rioxx.projectUoS-BioMar-MH(07-02-2013)|Mowi (Scotland)|en_UK
local.rioxx.filenameTaylor et al 2014b.pdfen_UK
Appears in Collections:Aquaculture Journal Articles

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