Parasites & Vectors

Table 2 Relationships between PCs and parasite body size (in log) or measurements of the attachment apparatus (in log)

From: Evolution of host specificity in monogeneans parasitizing African cichlid fish

		All parasites					Generalists					Specialists
Dependent variable			n	b	P	R²( P)		n	b	P	R²( P)		n	b	P	R²( P)
Parasite body size			28		ns			11		ns			17		ns
Dorsal anchors	Total length	PC3	28	−1.408	<0.001	0.336 <0.001	PC1	11	1.290	0.016	0.713 (0.008)	PC3	17	−1.954	<0.001	0.589 (<0.001)
							PC2		2.015	0.003
							PC4		−1.365	0.011
	Length to notch	PC3	28	−1.967	<0.001	0.620 (<0.001)		11		ns		PC3	17	−2.141	<0.001	0.687 (<0.001)
	Outer root	PC3	28	2.887	0.003	0.434 (<0.001)	PC5	11	−8.250	0.002	0.630 (0.002)		17		ns
		PC5		−4.060	0.001
	Inner root		28		ns			11		ns			17		ns
	Point		28		ns			11		ns			17		ns
Ventral anchors	Total length	PC1	28	0.914	<0.001	0.483 (<0.001)		11		ns		PC3	17	−0.971	0.005	0.427 (0.005)
		PC4		−0.787	0.003
	Length to notch	PC1	28	−0.969	0.002	0.296 (0.002)		11		ns		PC3	17	−1.167	0.005	0.420 (0.005)
	Outer root	PC3	28	3.433	<0.001	0.390 (<0.001)		11		ns			17		ns
	Inner root		28		ns			11		ns			17		ns
	Point		28		ns		PC2	11	1.324	0.006	0.631 (0.008)		17		ns
							PC4		−1.113	0.008
Marginal hooks	MH1		28		ns			11		ns			17		ns
	MH2		28		ns			11		ns			17		ns
	MH3		28		ns			11		ns			17		ns
	MH4		28		ns			11		ns			17		ns
	MH5		28		ns			11		ns			17		ns
	MH6		28		ns			11		ns			17		ns
	MH7		28		ns			11		ns			17		ns
Dorsal bar	Length of auricles		28		ns			11		ns			17		ns
	Total width		28		ns			11		ns			17		ns
	Distance between auricles		26		ns			10		ns			16		ns
	Thickness		24		ns			9		ns		PC3	15	−2.246	0.002	0.537 (0.002)
Ventral bar	Branch length		28		ns			11		ns			17		ns
	Maximum width	PC5	23	-4.718	0.003	0.361 (0.003)		10		ns			13		ns

Measurement of the attachment apparatus corrected for parasite body size. ns - non-significant relationship, b - the slope of regression, R² - the regression coefficient.

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ISSN: 1756-3305

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