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Table 1 Seasonal values of melatonin, testosterone and antioxidant enzyme activities in ram seminal plasma

From: Seasonal variations of melatonin in ram seminal plasma are correlated to those of testosterone and antioxidant enzymes

  Breding season Non breeding season
  (n = 28) (n = 20)
Melatonin (pg/ml) 137.51 ± 17.8a 46.57 ± 8.37b
Testosterone (ng/ml) 28.13 ± 3.35a 10.66 ± 2.92b
GPX (nmole/min.ml) 61.57 ± 4.48 52.86 ± 8.53
GRD (nmole/min.ml) 11.82 ± 0.84a 7.5 ± 0.47b
SOD (mmole/min.ml) 8.86 ± 0.15 8.56 ± 0.26
Catalase (μmole/min.ml) 2.11 ± 0.25 1.74 ± 0.19
  1. Values are shown as mean ± S.E.M. of the number of the number of seminal plasma samples assessed in brackets. Different letters in the same row account for significant differences between seasons (P < 0.01)