Fig. 3From: Evaluation of fecal samples as a valid source of DNA by comparing paired blood and fecal samples from American bison (Bison bison)Heterozygosity estimates from blood and fecal samples by animal. A significant overall reduction in heterozygosity is seen when fecal samples are used (p < 0.0001). Each fecal-blood pair from the same bison is referred to by number 1–50 (Additional file 1)Back to article page