Selection for larval freshwater tolerance in Macrobrachium nipponense (de Haan).
A selective breeding experiment was undertaken to produce a strain of Macrobrachium nipponense with freshwater-tolerant larval stages. Selection for this trait for 3 generations increased survival by 50% in 2 families. The h2 of larval freshwater tolerance was determined using a threshold model based on 2 phenotypic classes (live or dead). The realised h2 of freshwater tolerance, averaged over the 3 families studied and the 3 generations, was 0.24±0.07.