Aquaculture · 2025
Genomic selection for individual feed efficiency in the European seabass: Response to selection on efficiency, commercial traits and sex
Feed efficiency is key to sustainable fish farming. Sea bass breeders chosen by genomic selection (GBLUP) on their growth in individual tanks produce more efficient offspring: a group feed conversion ratio of 1.61 versus 1.83 for the least efficient group, with larger fish.
- The question
- Does genomic selection on individual feed efficiency improve European sea bass performance?
- The approach
- Among 399 sea bass measured in individual tanks and genotyped for 1,110 SNPs, efficient, intermediate and inefficient breeders were selected by GBLUP; their offspring were assessed in individual tanks, in groups and at slaughter.
- What the article brings
- Offspring of efficient breeders are more efficient (group feed conversion ratio 1.61 versus 1.83) and larger (266 g versus 223 g), with no difference in fillet yield; the proportion of females is lower in this group.
- The limits
- A slightly higher viscerosomatic index in efficient fish; results come from one cohort and an experimental set-up.
Figures from the article
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