RELATIONSHIP BETWEEN BODY CONFORMATION AND MILK YIELD AND COMPOSITION IN ZARAIBI AND DAMASCUS GOATS

ABSTRACT
This experimental work was carried out to investigate the relationship among age, body weight, body length, body circumference, body height or body condition score and reproductive performance, (represented in mating period, gestation period, litter size, weaning weight and growth rate till weaning), milk yield and composition for Damascus and Zaraibi goats.
Damascus does showed that mating period decreased significantly (P<0.05), while birth weight increased significantly (P<0.05) with aging. Litter size was significantly (P<0.05) lower, while weaning weight was significantly (P<0.05) higher for does aged 3-6 years. However, growth rate till weaning decreased significantly (P<0.05) with increasing does age above 6 years. Average daily milk yield and protein content increased significantly (P<0.05) with increasing age. Mating period was significantly (P<0.05) higher with body weight of 41-50 kg. Litter size decreased significantly (P<0.05), while both birth and weaning weight increased significantly (P<0.05) with increasing body weight more than 40 kg. Average daily milk yield did not significantly affected by body weight and body circumference. The contents of lactose and solids not fat in milk decreased significantly (P<0.05) with increasing body weight over 40 kg. Milk yield increased significantly (P<0.05) with increasing body length. The content of fat, protein, solids not fat and total solids were significantly (P<0.05) higher with body circumference over 100 cm. Mating period decreased significantly (P<0.05), however, birth and weaning weight and growth rate till weaning increased significantly (P<0.05) with increasing body height more than 65 cm. Mating period decreased significantly (P<0.05) with increasing body condition score. Litter size, birth and weaning weight and growth rate till weaning increased significantly (P<0.05) with increasing body condition score up to 4. Milk yield and fat content increased significantly (P<0.05) with increasing body condition score up to 4 and the contents of protein, solids not fat and total solids increased significantly (P<0.05) with increasing body condition score up to 3. While, lactose content was significantly (P<0.05) lower with body condition score 1.
With regard to Zaraibi does, mating period, birth and weaning weight and growth rate till weaning were higher significantly (P<0.05) with age 3-6 years. Average daily milk yield and protein content increased significantly (P<0.05) with increasing age, however, lactose content decreased significantly (P<0.05) after 6 years of age. Mating period decreased significantly (P<0.05), while litter size, birth and weaning weight and growth rate till weaning increased significantly (P<0.05) with increasing body weight more than 30 kg. Average daily milk yield and the contents of fat, protein, solids not fat and total solids in milk were significantly (P<0.05) higher in does with body weighed 41-50 kg. Milk yield increased significantly (P<0.05) with increasing body length. Mating period was significantly (P<0.05) lower, while litter size, birth and weaning weight and growth rate till weaning were significantly (P<0.05) higher with body circumference more than 80 cm. While, milk yield and composition were not significantly affected by body circumference. Mating period decreased significantly (P<0.05), however, birth and weaning weight and growth rate till weaning increased significantly (P<0.05) with increasing body height more than 55 cm. Milk yield increased significantly (P<0.05) with increasing body height more than 60 cm. However, the contents of fat, lactose, solids not fat and total solids in milk decreased significantly (P<0.05) with increasing body height more than 55 cm. Mating period decreased significantly (P<0.05) with increasing body condition score. Litter size, birth and weaning weight and growth rate till weaning, milk yield and the contents of protein, lactose, solids not fat and total solids in milk increased significantly (P<0.05)
with increasing body condition score up to 4. While, fat content increased significantly (P<0.05) with increasing body condition score up to 3.