Fig. 2
From: In vitro performance and in vivo fertility of antibiotic-free preserved boar semen stored at 5 °C
Sublethal sperm damage in semen samples preserved in AndroStar® Premium extender and stored at 17 °C with antibiotics (0.25 g/L gentamicin sulphate) or at 5 °C without antibiotics (n = 9 boars, experiment 1): Distribution of viable (Yo-Pro-1 neg.) spermatozoa (%) with low (M540 negative) or high (M540 positive) membrane fluidity and intact (PNA negative) or defective (PNA positive) acrosome. *Values of same sperm classes differ between storage temperature groups at a given time point (P < 0.05). #Values for overall sperm distribution in all four classes differ between storage temperature groups at a given time point (P < 0.05)