The relation between dry weight and age in days of the postlarvae in different
treatments was analyzed with a simple linear correlation and regression analysis with
logarithmic transformation of weight data. Regression coefficients were contrasted by
analysis of covariance. Post-hoc comparisons between slopes and intercepts were made
using the Tukey–Kramer method (Sokal and Rohlf, 1981). The same procedure was
used for the analysis of the relation between logarithmically transformed soluble-protein
content per larvae and age in days of postlarvae. Oxygen consumption, ammonia
excretion, and O:N ratio data were contrasted with two-factor analysis of variance (Zar,
1984). Differences were reported as statistically significant when P,0.05.