Sperm quality in frozen beef and dairy bull semen

Table 3 ROS-production (mean ± SD) in beef and dairy bull semen (n = 17 and 20 respectively)

ROS category	Beef	Dairy	Beef + MEN	Dairy + MEN
Live superoxide negative (%)	57 ± 18^a	35 ± 14^a	62 ± 23^b	37 ± 12^b
Live superoxide positive (%)	8 ± 3^a	25 ± 7^a	6 ± 6^b	24 ± 10^b
Dead superoxide positive (%)	36 ± 17	40 ± 11	32 ± 20	39 ± 9
Live hydrogen peroxide negative (%)	61 ± 23	61 ± 11	68 ± 20	62 ± 9
Live hydrogen peroxide positive (%)	4 ± 14	0.2 ± 0.3	0.6 ± 1.2*	0.1 ± 0.1*
Dead hydrogen peroxide negative (%)	31 ± 16*	39 ± 11*	30 ± 19*	39 ± 9*
Dead hydrogen peroxide positive (%)	4 ± 11	0.08 ± 0.2	1.2 ± 2.9	0.05 ± 0.08

Same superscripts within a row indicate significant difference (P < 0.001)
MEN menadione
* Denotes trend towards significance: for live hydrogen peroxide positive with menadione P < 0.055; for dead hydrogen peroxide negative P < 0.08; for dead hydrogen peroxide negative with menadione P < 0.066

ISSN: 1751-0147