Population density and group size effects on reproductive behavior in a simultaneous hermaphrodite

Table 1 General Linear Mixed Model results for the effects of group size (nominal factor) and density (continuous factor) on mating behaviour and fitness components.

Parameters	df	Type III SS	F	P	R ²
Mate encounter rate (per individual & day)
Full model (linear)	7	3208.68	16.36	< 0.001	0.63
Group size	2	1554.93	27.75	< 0.001
Density	1	1134.29	40.49	< 0.001
Run	4	479.22	4.28	0.004
Error	66	1848.92
log Mating rate (per individual & day)
Full model (linear)	7	4.16	4.05	< 0.001	0.30
Group size	2	0.17	0.56	0.57
Density	1	0.41	2.82	0.10
Run	4	3.52	6.00	< 0.001
Error	66	9.69
Average egg mass weight
Full model (quadratic)	8	2347.63	3.60	0.002	0.31
Group size	2	4.47	0.03	0.97
Density	1	112.08	1.38	0.24
(Density)²	1	1189.43	14.61	< 0.001
Run	4	1162.98	3.57	0.01
Error	65	5291.15
Total egg mass weight per individual
Full model (linear)	7	10019.56	9.21	< 0.001	0.49
Group size	2	235.63	0.76	0.47
Density	1	12.34	0.08	0.78
Run	4	9772.64	15.72	< 0.001
Error	66	10254.59
N egg masses per individual
Full model (linear)	7	49.08	17.97	< 0.001	0.66
Group size	2	0.53	0.68	0.51
Density	1	0.04	0.11	0.74
Run	4	48.44	31.03	< 0.001
Error	66	25.75

Significant P-values are indicated in bold. Note that interaction terms with P ≥ 0.25 were removed from the analysis (see Material and Methods for details).

ISSN: 2730-7182