Genetic effects on tolerance to acute cold stress in red drum,Sciaenops ocellatus L. |
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| Authors: | Eric Saillant Xiaoxue Wang Liang Ma Delbert M Gatlin III Robert R Vega John R Gold |
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| Institution: | 1. Center for Biosystematics and Biodiversity, Department of Wildlife and Fisheries Sciences, Texas A&M University System, College Station, TX, USA;2. Texas Parks and Wildlife Department, CCA CPL Marine Development Center, Corpus Christi, TX, USA |
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| Abstract: | Genetic effects on cold‐stress tolerance were assessed for red drum (Sciaenops ocellatus), an economically important sciaenid fish in the southern USA. Thirty‐five families were generated via ‘natural’ spawning of multiple sets of five breeders (three dams × two sires) in individual brood tanks. Offspring from the 35 families were transferred abruptly from an acclimation temperature of ～24 °C to 5.7 °C and maintained subsequently at an average temperature of 6.5 °C. Offspring were assigned a posteriori to individual broodfish (dam and sire) based on genotypes at nuclear‐encoded microsatellites. Heritability of the survival–time probability function was estimated using a proportional hazard approach and an animal‐additive model. The estimated heritability was 0.20 (95% CI: 0.07–0.40), indicating a significant genetic component to acute cold‐stress tolerance in red drum. |
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| Keywords: | cold‐stress tolerance heritability Sciaenops ocellatus microsatellites |
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