Table 1.
Ingredients and proximal composition of the experimental diets M (M1, M2) and PB (PB1, PB2).
Figure 1.
Effects of selection on survival and growth performances.
(A) Ten successive weight measurements were carried out during the first year of life. Growth curves are shown for the four line x diet combinations. Stars denote the significance of the diet*line interaction for body weight at every date of measurement (*: P<0.1; **: P<0.05; ***: P<0.01). (B) Selection gain for body weight (%) is calculated for fish fed with a plant-based (PB) diet (green line) and fish fed with a marine diet (blue line). The difference between the two gains is the PB diet-specific selection gain for the ability to grow when fed with a plant-based diet after one generation of selection. (C) The survival rate (%) was significantly higher in selected fish when fed PB diet when there was no difference between selected and unselected population when fed M diet. Different letters mean significant differences (P<0.05) between groups. (D) The coefficient of variation of body weight (%) was higher in groups of fish fed the PB diets throughout the trial, but was significantly reduced by selection in the case of the PB diet. Different letters mean significant differences (P<0.05) between groups.
Table 2.
Ls-means of body weight (BW), survival rate (Su), biomass (Biom) and coefficient of variation (CV) for ten dates and their statistical analyzes for line, diet effects and line*diet interaction.
Table 3.
Composition of whole fish after 291 days for dry matter (DM), lipid (Lip), protein (Pt), energy (Ener), EPA (20:5nā3), DHA (22:6nā3) and statistical test for selection, diet effects and interaction.
Table 4.
Observed gain (%) for body weight (BW), survival rate (Su) and total biomass (Biom) between selected and control lines fed on M (Gain M) or PB (Gain PB) diet and the PB-specific gain.