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dc.contributor.authorVargas, Cecilia
dc.contributor.authorPeruzzi, Stefano
dc.contributor.authorHagen, Ørjan
dc.date.accessioned2016-03-07T09:32:41Z
dc.date.available2016-03-07T09:32:41Z
dc.date.issued2015-05-26
dc.description.abstractThe aim of this study was to compare somatic growth and muscle fibre development in diploid and triploid siblings of Atlantic cod (Gadus morhua Linnaeus, 1758) during the larval stage. Newly hatched larvae were transferred into 200-L tanks, three tanks per ploidy group (70 larvae L−1, continuous light, gradually increasing seawater temperature 7–11°C and flow rates 50–117 L h−1). Larvae were fed rotifers from 2 to 22 days post hatch (dph), Artemia 19–31 dph and weaned onto a microparticulate diet from 26 dph until the end of the experiment. Measurements of growth (dry weight, standard length) and muscle cellullarity were taken at intervals between 1 and 44 dph. Ploidy groups showed a similar performance throughout the trial, although a marked stagnation in growth was observed for triploids during the weaning from Artemia onto dry feed. Overall, diploid and triploid cod larvae showed a similar development in muscle fibre growth pattern during the experimental period. For both groups, the total number of fast muscle fibres showed a 10-fold increase (from 384 to 3462), whereas the diameter of fast fibre increased from 8.9 to 13.3 μm (mean number from all treatments). Thus, a temporary but significant effect of triploidy on fast muscle fibre growth pattern was observed in 19 dph larvae in terms of fibre size and number, with triploids showing larger mean fast fibre diameter (11.62 ± 0.63 vs. 10.05 ± 0.34) and a lower number of fibres with a diameter <5 μm than their diploid siblings. Thus, this was found to be related to larvae size and to the differences in total fast fibre cross sectional areas rather than to ploidy status. Overall, our results suggest possible deficiencies in nutrients’ digestion and absorption of triploid cod larvae particularly during the transitional period from live food to inert diets.en_US
dc.descriptionAccepted manuscript version. Published version at <a href=http://doi.org/10.1111/jai.12792>http://doi.org/10.1111/jai.12792</a>.en_US
dc.identifier.citationJournal of Applied Ichthyology 2015, 31(4):687-694en_US
dc.identifier.cristinIDFRIDAID 1245792
dc.identifier.doi10.1111/jai.12792
dc.identifier.issn0175-8659
dc.identifier.urihttps://hdl.handle.net/10037/8714
dc.identifier.urnURN:NBN:no-uit_munin_8286
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.projectIDUniversitetet i Nordland: MARLIP Marine Platform - Project AF0048en_US
dc.relation.urihttp://onlinelibrary.wiley.com/doi/10.1111/jai.12792/abstracten_US
dc.rights.accessRightsopenAccess
dc.subjectGadus morhuaen_US
dc.subjectAtlantic coden_US
dc.subjecttriploidyen_US
dc.subjectgrowthen_US
dc.subjectmuscleen_US
dc.subjecthyperplasiaen_US
dc.subjecthypertrophyen_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.titleGrowth and muscle cellularity of diploid and triploid Atlantic cod (Gadus morhua Linnaeus, 1758) larvaeen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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