The effects of egg separation on hatching patterns of Locusta migratoria eggs. The frequency distribution of hatching times for eggs kept in the pods (A) or in masses of 20 eggs (C) and those kept as separated eggs (B, D) when the mean hatching time was assumed to be 0 h. The relative times of hatching for the eggs kept in the pods (E) or in masses of 20 eggs (F) and those kept as separated eggs when the mean value for the former eggs was designated as 0 h. The number of hatched eggs followed by the number of tested pods in parentheses is given in each panel. Asterisks indicate a significant difference between the two treatments (p < 0.05; t-test).