Evaluation of Genetic Parameters and Comparison of Stress Tolerance Traits in Different Strains of <i>Litopenaeus vannamei</i>

Abstract

Litopenaeus vannamei stands out globally in aquaculture for its fast growth, broad salt tolerance, disease resistance, and high protein levels. Selective breeding requires the precise estimation of the variance components and genetic parameters for important traits. This study formed lineages from 20 full sibling families of L. vannamei, with progenitors from Thailand and the USA. We then assessed the genetic resilience traits of juvenile shrimp from these families to high ammonia-N, high pH, and low salinity by performing a 96 h acute toxicity test. Mortality rates for the families under 96 h exposure to high ammonia-N, high pH, and low salinity were 19.52–92.22%, 23.33–92.22%, and 19.33–80.00%, respectively, showing significant variance in stress tolerance among families (p p L. vannamei.

Keywords

• <i>Litopenaeus vannamei</i>
• ammonia-N
• pH
• salinity
• tolerance
• heritability