Spawning Coordination of Mates in a Shell Brooding Cichlid

Table 3

Changes of the intervals between subsequent egg depositions and sperm releases and sperm release durations in relation to the time course of laying a clutch standardised (time: 0 = first egg laid to 1 = last egg laid). GLM with covariate time (and time squared for egg interval and sperm release duration), random effect of observation number (Nr 1 to 9), and their interaction.

		Egg interval		Ejaculation interval		Sperm release duration
		(𝑛=946)		(𝑛=2052)		(𝑛=2053)
	df	𝐹	𝑃	𝐹	𝑃	𝐹	𝑃
Intercept	1	39.5	<0.001	87.4	<0.001	108.4	<0.001
Time	1	14.0	<0.001	1.0	0.32	15.8	<0.001
Time^2	1	7.5	0.006			9.3	0.002
Nr	8	10.3	<0.001	8.5	<0.001	8.8	<0.001
Nr × time	8	5.5	<0.001	2.0	0.042	4.4	<0.001
Nr × time^2	8	3.8	<0.001			3.9	<0.001