Journal
ENVIRONMENTAL BIOLOGY OF FISHES
Volume 84, Issue 1, Pages 69-78Publisher
SPRINGER
DOI: 10.1007/s10641-008-9390-2
Keywords
Disease; Listonella; Mature male parr; Sex bias; Genetic
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Funding
- AquaNet
- Natural Sciences and Engineering Research Council Discovery Grant
- National Research Council of Canada's Genome and Health Initiative
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We report genetic differences for resistance to the pathogen Listonella anguillarum within and among one cultured and two wild Canadian populations of Atlantic salmon, Salmo salar, using a common-garden experimental protocol. Following exposure to the causative agent for vibriosis, parr originating from the endangered Stewiacke River population experienced significantly higher mortality than cultured parr, four generations removed from the Saint John River population, and wild parr from Tusket River. Pathogen resistance differed between sexes; males consistently experienced higher survival than females. There was no evidence that maturity influenced pathogen resistance in male parr. The population and sex differences in pathogen resistance documented here have implications for risk assessments of the demographic consequences of interbreeding between wild and farmed Atlantic salmon.
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