Table 1. Interval span (days) between consecutive spawnings in Experiment I.

Group	Duaration (days)	No. of spawnings	Mean interval (days)	No. of animals	mean interval (days)
I	181	1	181.0	2	80
	181	2	90.5	22
	181	3	60.3	19
	181	4	45.3	2
II	166	0	166.0	4	104
	166	1	166.0	13
	166	2	83.0	37
	166	3	55.3	6

Note: the first spawning is not counted.