Pre- and Postcopulatory Traits of Salvator Male Lizards in Allopatry and Sympatry

Table 2

Comparison of sperm parameters between social contexts in S. merianae and S. rufescens.

Sperm traits	Males in allopatry	Males in sympatry	Statistic	value
Salvator merianae
Concentration (10^6 cell/mL)	2204.2 ± 942.50	2750.63 ± 292.73		0.2773
	42.76	10.64
	Head length (m)	14.07 ± 1.53			13.0 ± 1.13		0.0846
10.91		8.71
Midpiece length (m)		5.08 ± 0.21	5.29 ± 0.21		0.0291
	4.08	4.04
	Flagellum length (m)	59.88 ± 0.77	59.16 ± 1.76				0.1894
1.29		2.97
Total sperm length (m)		79.7 ± 1.64	78.07 ± 2.63		0.0808
	2.06	3.36
	Flagellum/midpiece ratio	11.9 ± 0.44	11.29 ± 0.49				0.0054
3.68		4.33
Straight line velocity (m/s)		28.79 ± 6.23	29.37 ± 6.36		0.8317
	21.64	21.66
	Salvator rufescens
Concentration (10^6 cell/mL)	2289.69 ± 934.18	2621.67 ± 1103.62		0.5334
	40.80	42.10
	Head length (m)	13.09 ± 1.47			13.11 ± 1.50		0.974
11.24		11.45
Midpiece length (m)		4.96 ± 0.16	4.92 ± 0.19		0.6277
	3.19	3.81
	Flagellum length (m)	57.42 ± 1.09	57.3 ± 1.09				0.7911
1.90		1.91
Total sperm length (µm)		76.21 ± 1.90	75.94 ± 2.51		0.7326
	2.49	3.30
	Flagellum/midpiece ratio	11.74 ± 0.41	11.81 ± 0.48				0.6915
3.46		4.08
Straight line velocity (m/s)		30.09 ± 7.91	27.83 ± 408		0.4175
	26.27	14.67