Data are presented as mean ± standard deviation. Percentages
(D-larval yield) were arcsin square root transformed before analysis.
Means were compared using Student t tests or ANOVA. For ANOVA
and when differences were significant (P b 0.05), a Fisher a posteriori
test was used for mean comparisons. Because variances were not
homogeneous, morphological data on oocytes were compared using a
non parametric Mann and Whitney test.