Parentage analysis of commercial lumpfish (Cyclopterus lumpus) brood stock in Newfoundland.

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Authors

Skillings, Ashley

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University of Guelph

Abstract

Lumpfish (Cyclopterus lumpus) are widely used in the Northern Atlantic as a biological control for the destructive parasite Lepeophtheirus salmonis (salmon louse) in the commercial Atlantic salmon sea cages. Previous studies on lumpfish suggest that there is a genetic component associated with salmon louse consumption. My goal was to create the foundation for a new selective breeding program for sea lice eating efficiency derived from Canadian lumpfish populations. My main objective was to create a panel of 96 SNPs for parentage analysis of hatchery-reared lumpfish founded from Canadian wild-collected lumpfish. The Colony software showed that first year of breeding (2015) only produced 4 full-sib families. The Cervus parentage analysis showed that inbreeding was present and was therefore unable to determine unique parents among the brood stock. Estimated Breeding Values for natural prey foraging trait were calculated but were not significant due to the small number of available families.

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Keywords

Lumpfish, Cyclopterus lumpus, Estimated Breeding Values, parentage analysis, sea lice eating efficiency, Lepeophtheirus salmonis, Biological delousing

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