Size at reproduction at the four sites studied.

Sizes (median) were estimated from the logistic regression model. Fisher's test was applied separately to females (F Fisher's Test) and males (M Fisher's Test) to compare median sizes, all p-values were around 0.005 or non significant (ns) The table indicates where a type is significantly differente. N = nase, S = sofie, HyN = hybrids with nase mtDNA, HyS = hybrids with sofie mtDNA.