Table 2.

Corporal measurements and sperm numbers in five hamster species. Values indicate mean ± standard error. RTS: relative testes size calculated according to Kenagy and Trombulak [75].

Species	Body Mass (g)	Testes Mass (g)	RTS	Sperm Numbers (×106)
Cricetulus griseus	33.72 ± 0.38	1.78 ± 0.04	3.83 ± 0.11	88.00 ± 07.65
Mesocricetus auratus	125.00 ± 1.63	3.50 ± 0.12	2.75 ± 0.11	585.88 ± 36.81
Phodopus campbelli	48.55 ± 3.90	2.01 ± 0.08	3.30 ± 0.21	317.82 ± 25.12
Phodopus sungorus	46.82 ± 1.25	0.94 ± 0.06	1.58 ± 0.13	160.76 ± 27.07
Phodopus roborovskii	25.72 ± 1.15	1.06 ± 0.04	2.82 ± 0.12	175.64 ± 26.59