Table 2.

Egg collection increase by in-tube forced oviposition

Species	Mean egg number per female		Increase % in egg yield
	In-tube forced oviposition	In-cage free oviposition
An. coustani	41.18	9.78	321
An. funestus	52.82	7.58	597
An. mascarensis	41.17	5.19	693
An.arabiensis	27.48	8.23	234
An. squamosus	23.35	3.00	678

The mean egg number takes into account all females put in tubes or in cages from a single field collection as plotted in Fig. 7. Increase % in egg yield was calculated as follows: 100 × (mean number in tube-mean number in cage)/mean number in cage