Table 1 Results from the mixed models on the effect of age on sperm traits. All the variables were fitted with a binomial distribution, with the exception of sperm velocity that was fitted with a gaussian distribution
From: Age-dependent decline in sperm quality and function in a naturally short-lived vertebrate
Trait | Estimates ± SE | χ 2 | p | Hedges’ g (95% CIs) | Number of males |
|---|---|---|---|---|---|
Sperm viability | 0.48 ± 0.15 | 10.991 | < 0.001 | 0.99 (0.33, 1.65) | n = 18 adult, n = 23 old |
Sperm DNA integrity | 0.31 ± 0.07 | 21.454 | < 0.001 | 1.77 (0.70, 2.84) | n = 9 adult, n = 11 old |
Sperm motility | 0.91 ± 0.16 | 33.886 | < 0.001 | 1.62 (0.92, 2.33) | n = 10 adult, n = 13 old |
Sperm velocity | -0.77 ± 2.08 | 0.136 | 0.712 | 0.22 (-0.44, 0.90) | n = 10 adult, n = 10 old |