It showed that: - the regression of K on ln(weight) was highly significant (P < 0.0001, a = 0.172), demonstrating a positive correlation between weight and condition factor; The PROSPER method for selecting fish 655 Figure 3.
Moreover, family and combined selection also often include inbreed- ing control and selection on traits other than growth, limiting the potential gain on this last trait, which was not the case in our experiment. Since our response is estimated as a contrast between the offspring of a random bred control and the offspring of the selected line, one possible reason for the large response would be a negative trend on the genetic value of the control, caused by inbreeding or random drift.