Negative frequency-dependent selection or alternative reproductive tactics: maintenance of female polymorphism in natural populations

Table 2 Results of the ANCOVA analyses explaining variation in four key fecundity estimates

	Effect	DF	F	P
-Relative body mass
	Morph	761	0.78	0.38
	Afreq	758	0.96	0.33
	OSR	762	4.7	0.031
	Mdens	759	0.72	0.40
	Morph*Afreq	756	0	0.98
	Morph*OSR	760	1.1	0.29
	Morph*Mdens	757	1.99	0.16
-Egg mass
	Morph	516	1.2	0.27
	Afreq	517	9.57	0.002
	OSR	517	20.49	<.0001
	Mdens	513	0.01	0.93
	Morph*Afreq	514	0.11	0.75
	Morph*OSR	515	0.82	0.37
	Morph*Mdens	512	0	0.98
-Egg number
	Morph	534	1.95	0.16
	Afreq	534	8.48	0.004
	OSR	534	19.22	<.0001
	Mdens	532	0.08	0.78
	Morph*Afreq	534	4.22	0.040
	Morph*OSR	533	0.12	0.73
	Morph*Mdens	531	0.18	0.67
-Clutch mass
	Morph	515	2.2	0.13
	Afreq	515	4.97	0.026
	OSR	515	33.85	<.0001
	Mdens	514	0.52	0.47
	Morph*Afreq	515	5.59	0.019
	Morph*OSR	513	0.44	0.5083
	Morph*Mdens	512	0.0	0.9976

Explanatory variables include female morph frequencies (Afreq), male density (Mdens) and operational sex ratio (OSR). All four analyses are controlled for variation among populations, years and mating status (see methods). The asterisks (*) indicate tested interactions between two main effects. Numerator degrees of freedom is 1 in all cases, DF in the table refers to the denominator degrees of freedom. Note that egg mass, egg number and relative clutch mass were measured in two successive years and body mass in three subsequent years. Significant results are indicated in bold.

ISSN: 2730-7182