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Scientific Report

Relationships between Growth and Disease Resistance in Rainbow Trout, Oncorhynchus mykiss (Walbaum)

Report

Abstract

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. Percent 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.

Authors

Ken Overturf, S. LaPatra, R. Towner, N. Campbell, and S. Narum

Citation

Overturf, K., S. LaPatra, R. Towner, N. Campbell, and S. Narum. 2010. Relationships Between Growth and Disease Resistance in Rainbow Trout, Oncorhynchus mykiss (Walbaum). Journal of Fish Diseases 33:321-329.

Date

Apr 1st, 2010

Report No.

Overturf_etal_JOFD_2010

Media Type

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