GROWTH RATE OF OSTRICH (STRUTHIO CAMELUS) CHICKS UNDER INTENSIVE MANAGEMENT IN BOTSWANA
Tóm tắt
Thirty-seven ostrich chicks raised artificially had their weights, lengths of metatarsus and heights measured weekly from hatching to the 16th week. Despite weight loss during the first week due to utilization of egg yolk by the chicks, the chicks showed an exponential growth up to the twelfth week with an overall mean weekly weight gain of 1.3 kg. Female chicks showed a superior mean weekly gain of 1.6 kg compared to 1.2 kg for males. The metatarsal length grew rapidly at a weekly rate of 2.5 cm, but began to decline in the 11th week even though the weights and heights of the chicks were still increasing. The correlation coefficient between body weight and metatarsal length was 0.97. Individual chicks also maintained their respective heavy or light weight hierarchies throughout the study period. Thus isolation of chicks into groups by weight and raising them separately could have a role in the artificial rearing of ostrich chicks. Furthermore, ostrich chick rearing may be improved by regularly weighing chicks as a means of detecting changes in the growth patterns.
Tài liệu tham khảo
Deeming, D.C. and Ayres, L., 1994. Factors affecting the growth of ostrich chicks in captivity. Veterinary Record, 135, 617–622
Degen, A.A., Kam, M., Rosentrauch, A. and Plavnik, I., 1991. Growth rate, total water volume, dry matter intake and water consumption of domesticated ostriches. Animal Production, 52, 225–232
Emmans, G.C. and Fisher, C., 1986. Problems in nutritional requirements theory. Animal Science, 51, 129–132
Erasmus, J. and Erasmus, E de V., 1993. Ostrich odyssey: a guide in ostrich farming in Southern Africa, (Feather Farm, PO Box 2151, Nylstroom 0510, Republic of South Africa)
Gandini, G.C.M. and Keffen, R.H., 1985. Sex determination of the South African ostrich (Struthio camelus). Journal of South African Veterinary Association, 56, 20–21
Hallam, M.G., 1992. Veterinary problems in ostriches. In: The TOPAZ Introduction to Practical Ostrich Farming, (Superior Print and Packaging, Harare, Zimbabwe), 61–96
Huchzermeyer, F.W., 1994. Nutritional diseases. In: Ostrich Diseases, (Agricultural Research Council, Onderstepoort Veterinary Institute, Republic of South Africa), 50–53
Shanawany, M.M., 1995. Recent developments in ostrich farming. World Animal Review, 83, 3–8
Smit, D.J., 1963. Ostrich farming in Little Karroo. Bulletin No. 358, Department of Agricultural Technical Services, Pretoria
Tzeng, R.Y., 1981. Growth patterns of body and abdominal fat weights in broiler chickens. Poultry Science, 60, 1101–1106