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Relationships between growth and disease resistance in rainbow trout, Oncorhynchus mykiss (Walbaum)



Relationships between growth and disease resistance in rainbow trout, Oncorhynchus mykiss (Walbaum)



Journal of Fish Diseases 33(4): 321-329



Rainbow trout from 23 families were evaluated for growth and resistance to the bacterial coldwater disease (BCWD) caused by Flavobacterium psychrophilum and infectious haematopoietic necrosis (IHN) caused by IHN virus. Average family weights were between 161 and 263 g with an average of 225 g at 213 days post-fertilization with specific growth rates ranging from 2.37 to 2.88. Per cent survival of fish challenged with F. psychrophilum was between 18% and 100%, while for those challenged with IHNV, the range was between 12% and 93%. Significant positive correlations were found for end body weight and resistance to IHN (P < 0.05) and for early body weight and resistance to BCWD (P < 0.1). However, no significant correlations were detected between resistance to both pathogens or disease resistance and overall genetic diversity or diversity within the major histocompatibility locus.

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Accession: 055472353

Download citation: RISBibTeXText

PMID: 20059633

DOI: 10.1111/j.1365-2761.2009.01124.x


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