ArticleGenetics, selection, evolution : GSE2020
The genetic correlation between feed conversion ratio and growth rate affects the design of a breeding program for more sustainable fish production.
Article in Genetics, selection, evolution : GSE, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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9 citing papers in PubMed.
- Impacts of Replacing Fish Meal With Duck By-Product Meal in Diets on Growth Performance, Feed Utilization, and Economic Efficiency of Olive Flounder (Aquaculture nutrition · 2026Article
- Deriving breeding goals and expected selection responses to reduce environmental impacts in rainbow trout farming.Genetics, selection, evolution : GSE · 2025Article
- Genetic Parameters of the Growth Rate, Survival Rate and Feed Efficiency Ratio of Turbot (Animals : an open access journal from MDPI · 2025Article
- Side-Stream Based Marine Solubles From Atlantic Cod (Aquaculture nutrition · 2025Article
- Comparative transcriptomics identifies genes underlying growth performance of the Pacific black-lipped pearl oyster Pinctada margaritifera.BMC genomics · 2024Article
- Improvement of Fish Growth and Metabolism by Oligosaccharide Prebiotic Supplement.Aquaculture nutrition · 2022Article
- Economic and environmental assessments of combined genetics and nutrition optimization strategies to improve the efficiency of sustainable pork production.Journal of animal science · 2021Article
- Evaluating environmental impacts of selection for residual feed intake in pigs.Animal : an international journal of animal bioscience · 2020Article
- The Effects of Feed Restriction and Isolated or Group Rearing on the Measurement of Individual Feed Intake and Estimation of Feed Conversion Ratio in Juvenile Nile Tilapia (Frontiers in genetics · 2020Article
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4 authors.
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Abstract
backgroundMost fish breeding programs aim at improving growth rate and include feed conversion ratio (FCR) neither in the breeding goal nor in the selection index, although decreasing FCR is known to increase farm profit and decrease environmental impacts. This is because FCR is difficult to measure in fish that live in groups and FCR is assumed to have a favourable (negative) genetic correlation with growth, although the magnitude of this correlation is unknown. We investigated the effect of the genetic correlation between growth and FCR on the economic and environmental responses of a two-trait breeding goal (growth and FCR), compared to a single-trait breeding goal (growth only). Next, we evaluated the weights to assign to growth and FCR in a two-trait breeding goal to maximize sustainability of fish production.
methodsWe used pseudo-best linear unbiased prediction (BLUP) index calculations to simulate a breeding program for sea bass. For the single-trait breeding goal, the trait in the breeding goal and in the index was thermal growth coefficient (TGC) and for the two-trait breeding goal, the traits in the breeding goal were TGC and FCR and the traits in the index were TGC and percentage of fat in the dorsal muscle (an indirect measure of FCR). We simulated responses to selection for genetic and phenotypic correlations between TGC and FCR ranging from 0 to - 0.8. Then, in the two-trait breeding goal, we calculated the economic return and the change in eutrophication when using economic values (EV) or environmental values (ENV).
resultsWhen the genetic correlation between TGC and FCR was lower than - 0.45, we found major differences in economic returns and in eutrophication between single and two-trait breeding programs. At a correlation of - 0.25, the two-trait breeding goal based on EV increased economic return by 25% compared to the single-trait breeding goal, while using ENV decreased eutrophication by 1.34% per ton of fish produced after one generation of selection.
conclusionsThe genetic correlation between TGC and FCR affects the magnitude of economic losses due to omitting FCR in the breeding program. In addition, the genetic correlation affects the importance of choosing EV or ENV to reduce eutrophication and increase profit.
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