Fig. 1

The changes in testicular volume (TV, cm, A), pulsatility index (PI, B), resistance index (RI, C), and the total-colored area (TCA; pixel, D) in bucks with different coats colors (WC, BC, WBC, and BrC; n = 5 each) in the summer season (W1-W7; THI > 88.3). Data are presented as means ± standard errors of the means (SEM). Wks = weeks, WC = white colored, BC = black colored, WBC = white-black colored (50–60% white), BrC = brown colored, THI = temperature humidity index. Means with different superscripts are significantly different at P < 0.05. *Values in each measure are different at least at P < 0.05 between the groups (BC and BrC Vs WC and WBS)