In conclusion, because of the very high genetic correlation between the expressions of body traits in the two sexes, in GIFT there is very limited scope for selection for sexual dimorphism. With regards to body shape there is also limited scope for change, but the results obtained with all the selection alternatives (indices combining harvest weight, length, width and depth) that were examined indicate that selection for greater harvest will slowly result in relatively longer and thinner fish due to greater response in length than in width and depth.