mixed-sex population presented a significantly higher final weight
(33%), growth rate (40%) and condition factor (5%) than in the 95%
male population. Fish in the lower predator density proportion (7:1)
showed a significantly greater final weight and growth rate than in
the higher predator density (3:1).Mayan cichlid growth in the two populations
during the experimental period is presented in Fig. 2. A very
slow growth was observed during the first 3 weeks. From the 6th
week,Mayan cichlids from themixed-sex population showed a greater
average weight and this difference increased with time until the end of
the growth trial.
Mayan cichlid growth in the mixed-sex population by proportion is
presented in Fig. 3a. Significant ANOVA differences (p b 0.05) were
found among the three proportions from week 15 until the end of the
experiment. Mayan cichlid growth in the 95% male population by
proportion (Fig. 3b) showed the same trend (7:1 N 5:1 N 3:1) but no
significant differences were found during the growth period (ANOVA,
p N 0.05).