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Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/9348

Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Comparative seawater performance and deformity prevalence in out-of-season diploid and triploid Atlantic salmon (Salmo salar) post-smolts
Author(s): Leclercq, Eric
Taylor, John
Fison, Damian
Fjelldal, Per Gunnar
Diez-Padrisa, Meritxell
Hansen, Tom
Migaud, Herve
Contact Email: herve.migaud@stir.ac.uk
Keywords: Atlantic salmon
Triploid
Growth
Deformity
Vertebrae
Cataract
Family
Issue Date: Jan-2011
Publisher: Elsevier
Citation: Leclercq E, Taylor J, Fison D, Fjelldal PG, Diez-Padrisa M, Hansen T & Migaud H (2011) Comparative seawater performance and deformity prevalence in out-of-season diploid and triploid Atlantic salmon (Salmo salar) post-smolts, Comparative Biochemistry and Physiology Part A: Molecular and Integrative Physiology, 158 (1), pp. 116-125.
Abstract: The use of sterile triploid stock in the Atlantic salmon (Salmo salar, L) farming industry is the only commercially available means to prevent the ecological impact of domesticated escapees. This study compared the seawater (SW) performance and deformity prevalence of diploid and triploid post-smolts from 2 full-sib families produced out-of-season. Triploids completed smoltification 4 weeks earlier and at a significantly higher body-weight. Growth and survival in SW were not significantly affected by ploidy. The incidence of external deformities, dominated by jaw malformation, was ~ 12% in triploids and below 5% in diploids. Vertebral deformities were more prevalent in the fastest growing triploid family only. Heart morphometry differed between ploidies which may relate to a higher cardiac workload in triploids. No clear alteration of the gill apparatus was detected. The most significant detrimental effect of triploidy was on the rate and severity of cataract that were observed from August onward (50% and 92% of diploids and triploids respectively affected after 1-year in SW). At that time, cataracts were diagnosed by histological examinations as irreversible with a probable osmotic origin which could arise from factors such as water quality, nutritional deficiencies or thermal variations. This study warrants further research aiming at adapting rearing practices to the needs of triploid stocks as to improve their performance and welfare.
Type: Journal Article
URI: http://hdl.handle.net/1893/9348
DOI Link: http://dx.doi.org/10.1016/j.cbpa.2010.09.018
Rights: The 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.
Affiliation: Aquaculture
Aquaculture
University of Stirling
Institute of Marine Research, Norway
University of Stirling
Institute of Marine Research, Norway
Aquaculture

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