Inbreeding among cultivated Atlantic cod (Gadus morhua) and its effects on offspring ...

• Main Authors: Puckrin, Olivia A., Trippel, Edward A., Purchase, Craig F., Fleming, Ian A.
• Format: Conference Object
• Language: unknown
• Published: ASC 2011 - Theme session H 2024
• Subjects: Fisheries and aquaculture; atlantic cod; Gadus morhua
• Online Access: https://dx.doi.org/10.17895/ices.pub.25039793; https://ices-library.figshare.com/articles/conference_contribution/Inbreeding_among_cultivated_Atlantic_cod_Gadus_morhua_and_its_effects_on_offspring/25039793

No abstracts are to be cited without prior reference to the author.Farmed Atlantic cod (Gadus morhua) spawn in cages, releasing eggs into the environment. With potentially thousands of siblings in a cage, the likelihood of inbreeding during spawning is high. Inbreeding may produce poor‐quality offspring which could mature and interbreed with wild cod, possibly reducing the fitness of farmed–wild cod offspring. The goal of this project was to determine if inbreeding occurs among farmed cod, and if inbred offspring have reduced survival or are of poorer quality. Embryos collected from spawning events in tanks of sister–brotherunrelated male trios were analysed using microsatellite DNA analysis to determine parentage. Single and multiple paternity was observed across batches. In two tanks, the brother had greater spawning success than the unrelated male, however, females generally favoured unrelated males as spawning partners (p < 0.001). Offspring mortality, deformities, size, and hatching success were ...