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Body Weight and Scrotal-Testicular Biometry in Three Indigenous Breeds of Bucks in Arid and Semiarid Agroecologies, Ethiopia.
The body weight and testicular and epididymal parameters of Afar, Long-eared Somali (LES), and Woyto-Guji (WG) breeds of goat were investigated. A total of 405 randomly selected bucks of Afar (n = 135), Long-eared Somali (n = 135), and Woyto-Guji (n = 135) were included in this study. The overall mean scrotal circumference (SC), testicular volume (TV), testicular length (TL), testicular weight (TW), body weight (BW), epididymal weight (EW), body condition score, and testicular diameter (TD) measurements in all bucks were 20.8 ± 1.94 cm, 68.1 ± 6.18, 4.96 ± 0.79 cm, 70.0 ± 5.66 g, 22.1 ± 2.98 Kg, 9.09 ± 1.88 g, 2.55 ± 0.68, and 4.28 ± 0.45 cm, respectively. Significant (p < 0.05) breed differences in SC, TD, TL, TW, BW, EW, and TV were recorded. Long-eared Somali (LES) breed was heaviest and Afar breed was the lightest and Woyto-Guji (WG) had the average BW. In all breeds, the parameters were positively correlated. In Afar breed, the TW had a significant correlation with BW (r = 0.90) and SC (r = 0.65). In LES BW was highly correlated with TD (r = 0.96) and TL (r = 0.96). In WG, TW was significantly correlated with TD (r = 0.94), EW (r = 0.90), TL (r = 0.89), and BW (r = 0.82). In multiple regression analysis the linear combinations of BCS, SC, and BW significantly predicted TW, TL, TV, TD, and EW in all breeds. In conclusion, Long-eared Somali breed displayed greater BW and scrotal and testicular traits.
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