Sex-specific effects of a parasite evolving in a female-biased host population

Table 2 Summary of differences in body length between infected and uninfected female and male hosts

	D. magna clone	Sex	N	t-ratio	P-value
	Kela 08-10	Female	42	5.24	< 0.0001
Exp.		Male	38	-1.62	0.95
No. 2	Kela 20-13	Female	45	3.71	< 0.0001
		Male	34	1.34*	0.21
	Xfa6	Female	27	4.53	< 0.0001
		Male	27	0.95	0.35
Exp.	Xinb3	Female	27	4.73	< 0.0001
No. 4		Male	27	0.7	0.49
	SP-1-2-3	Female	27	3.74	< 0.0001
		Male	37	0.08	0.53

Based on t-test comparisons, the parasite-induced gigantism only in female hosts. The results for females remain significant (P < 0.01) when corrected for multiple testing. The means of body length are represented in Figure 5. * Result obtained with a "Welch's t-test" to control for unequal variances.

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