Productive performance of Dorper sheep
Tóm tắt
Từ khóa
Tài liệu tham khảo
Abstract of Agricultural Statistics, 1997. Directorate: Communication, Private Bag X144, Pretoria 0001, South Africa.
Ackermann, J.J., 1993. A study of Dorper sheep in the Dorper land area (in Afrikaans). M.Sc. treatise, University of Stellenbosch, Stellenbosch, South Africa.
Alexander, G., 1984. Constraints to lamb survival. In: Lindsay, D.R., Pearce, D.T. (Eds.), Reproduction in Sheep, Australian Academy of Science in conjunction with the Australian Wool Corporation, Canberra, Australia, pp. 199–209.
Badenhorst, 1991, Production and reproduction norms for Dorper sheep evaluated in two different areas (in Afrikaans), Karoo Agric., 4, 9
Basson, 1970, Growth and puberty of lambs raised under intensive conditions, Proc. S. Afr. Soc. Anim. Prod., 9, 171
Basson, 1969, The productive and reproductive potential of three sheep breeds mated at 8-monthly intervals under intensive feeding conditions, Proc. S. Afr. Soc. Anim. Prod., 8, 149
Bonsma, F.N., 1944a. Milk production studies with sheep, Farm. S. Afr. Part XIX, May 1944, pp. 311–328.
Bonsma, F.N., 1944b. Influence of milk yield on the growth of lambs, Farm. S. Afr. Part XIX, June 1944, pp. 311–328.
Boshoff, 1975, Reproductive patterns of five sheep breeds under extensive conditions, S. Afr. J. Anim. Sci., 5, 37
Boshoff, 1986, Grading of Dorper carcasses (in Afrikaans), Dorper News, 38, 3
Brand, 1992, Half-castration as a method to increase growth of slaughter lambs (in Afrikaans), Prog. and Proc. S. Afr. Soc. Anim. Prod., 31, X4
Bruwer, G.G., 1984. Objective evaluation of the carcass grading system for lambs and sheep in R.S.A., M.Sc. treatise, University of Stellenbosch, Stellenbosch, South Africa.
Buitendag, 1985, Management for profit on the Rivers farm, Zimbabwe, Dorper News, 37, 18
Campbell, 1963, A study of traits affecting the pre-weaning growth rate of Dorper lambs, Proc. S. Afr. Soc. Anim. Prod., 2, 123
Campbell, 1972, Influence of weight of dam on weaning weight of Dorper lambs, S. Afr. J. Anim. Sci., 2, 25
Campbell, Q.P., 1974. A study of breeding problems in Dorper sheep. D.Sc. dissertation, University of the Orange Free State, Bloemfontein, South Africa.
Campbell, Q.P., 1989. Make money with mutton sheep. Cedar printing and silkscreening, P.O. Box 2881, North End 6056, South Africa.
Campbell, 1995, Factors influencing the functional efficiency of Dorper sheep (in Afrikaans), Dorper News, 53, 14
Campbell, 1964, The effect of time and method of castration and docking on growth and carcass quality of Dorper lambs, Proc. S. Afr. Soc. Anim. Prod., 3, 136
Campbell, 1967, Early estimation of post-weaning weight-gaining potential of Dorper ram lambs, Proc. S. Afr. Soc. Anim. Prod., 6, 129
Casey, N.H., 1992. Carcass and growth characteristics of four South African sheep breeds and the Boer goat. D.Sc. dissertation, University of Pretoria, Pretoria, South Africa.
Cloete, 1987, Production parameters for a commercial Dorper flock on extensive pastures, S. Afr. J. Anim. Sci., 17, 121
Coetzee, 1964, Influence of flushing on reproductive efficiency of ewes (in Afrikaans), Proc. S. Afr. Soc. Anim. Prod., 3, 63
Coetzer, 1995, The effects of mating season and increased frequency of mating on weaner lamb production systems in the northern Cape, Proc. S. Afr. Soc. Anim. Sci., 34, 43
Dalton, 1978, The New Zealand Romney sheep: A review of productive performance, Anim. Breed Abstr., 46, 657
Degen, 1992, Body mass loss and body fluid shifts during dehydration in Dorper sheep, J. Agric. Sci. (Camb.), 119, 419, 10.1017/S0021859600012260
Elias, 1985, Characteristics and indices of reproduction in Dorper sheep, J. S. Afr. Vet. Assoc., 56, 127
Eltawil, 1990, Ewe productivity in four breeds of sheep in Saudi Arabia, World Rev. Anim. Prod., 25, 93
Erasmus, 1994, Production and reproduction performance following progestogen–PMSG treatment of Dorper ewes on veld, Proc. S. Afr. Soc. Anim. Sci., 33, 91
Fourie, 1993, Reproductive performance of commercial Merino, Dohne Merino and SA Mutton Merino flocks in the Southern Cape, S. Afr. J. Anim. Sci., 23, 104
Greeff, J.C., Hofmeyr, J.H., Wyma, G.W., Van Deventer, J.F.P.J., 1988. Preliminary results on heterosis and breed transmitted effects in respect of fertility and survival rate of Romanov and Dorper crossbreds. Proc. 3rd Wld. Congr. Sheep Beef Cattle Breeding, Vol 2, 19–23 June 1988, Paris.
Greeff, 1990, Differences in ovulation rate, embryo loss and litter size among Romanov, Dorper and F1-crosses (in Afrikaans), Proc. S. Afr. Soc. Anim. Sci., 29, L4.10
Haughey, 1991, Perinatal mortality—its investigation, causes and control, J. S. Afr. Vet. Assoc., 62, 78, 10.4102/jsava.v62i2.1599
Inyangala, 1991, Factors affecting growth of Dorper and Dorper×Red Maasai sheep, Bull. Anim. Health Prod. Afr., 39, 383
Inyangala, 1990, Genetic and phenotypic estimates of growth traits of Dorper and Dorper×Red Maasai sheep, Bull. Anim. Health Prod. Afr., 38, 437
Inyangala, 1992, Increasing productivity from indigenous sheep on small scale farms in Kenya, J. Zimb. Soc. Anim. Prod., 4, 97
Jordan, 1989, The magnitude of reproductive wastage to lamb marking in 30 flocks in South-West Queensland, Aust. Vet. J., 66, 202, 10.1111/j.1751-0813.1989.tb09808.x
Joubert, 1962, Sex behaviour of purebred and crossbred Merino and Persian ewes, J. Reprod. Fertil., 3, 41, 10.1530/jrf.0.0030041
Joubert, 1972, Effect of season and plane of nutrition on post-parturient anoestrus in Dorper sheep, Agroanimalia, 4, 19
Joubert, 1964, Observations on the sex behaviour of Dorper and Dohne Merino ewes, Proc. S. Afr. Soc. Anim. Prod., 3, 139
Knight, 1975, Studies on ovine infertility in agricultural regions in Western Australia: Analysis of reproductive wastage, Aust. J. Exp. Agric. Anim. Husb., 15, 183, 10.1071/EA9750183
Le Roux, 1969, The influence of cottonseed meal and lick containing urea on the composition of milk in Dorper and Dorper×Blackhead Persian ewes, Proc. S. Afr. Soc. Anim. Prod., 8, 131
Manyuchi, 1991, Breed and environmental influences on weaner lamb production in Zimbabwe, Trop. Anim. Health Prod., 23, 115, 10.1007/BF02361196
Marais, 1990, Geographic distribution of Dorper sheep in the republic, Dorper News, 46, 4
Marais, 1991, The efficiency of protein and fat deposition during growth in Dorper sheep, S. Afr. J. Anim. Sci., 21, 103
Marais, 1991, The effect of compensatory growth on feed intake, growth rate, body composition and efficiency of feed utilization in Dorper sheep, S. Afr. J. Anim. Sci., 21, 80
Nel, J.A., 1993. History of the Dorper (in Afrikaans). Published by the Dorper Sheep Breeder’s Society of South Africa, P.O. Box 26, Middelburg 5900, South Africa.
Neser, 1995, Estimated genetic trends for weaning weight in three Dorper lines with different selection criteria, S. Afr. J. Anim. Sci., 25, 65
Olivier, 1990, Increasing animal number after drought (in Afrikaans), Dorperland, 1990, 23
Plant, J.W., 1984. Is research aimed at industry problems? In: Lindsay, D.R., Pearce. D.T. (Eds.), Reproduction in Sheep. Australian Academy of Science in conjunction with the Australian Wool Corporation, Canberra, Australia, pp. 394–397.
Pretorius, 1970, The role of fecundity in increased lamb production (in Afrikaans), Agroanimalia, 2, 27
Pretorius, 1968, Increasing fecundity in Dorper ewes (in Afrikaans), Proc. S. Afr. Soc. Anim. Prod., 7, 147
Schoeman, 1992, Performance of Dorper sheep under an accelerated lambing system, Small Rumin Res., 9, 265, 10.1016/0921-4488(92)90156-X
Schoeman, 1987, Testicular development in Dorper, Dohne Merino and crossbred rams, S. Afr. J. Anim. Sci., 17, 22
Schoeman, 1995, Comparative assessment of biological efficiency of crossbred lambs from two composite lines and Dorper sheep, Small Rumin Res., 16, 61, 10.1016/0921-4488(94)00051-8
Schoeman, 1993, A comparison between female lambs of the Dorper and two synthetic composites with respect to feed intake, growth and efficiency, S. Afr. J. Anim Sci., 23, 4
Schoeman, 1993, Assessment of the reproductive and growth performance of two sheep composites, developed from Finnish Landrace, compared to the Dorper, S. Afr. J. Anim Sci., 23, 207
Schoeman, 1987, The relationship between testis size and stimulated plasma testosterone concentrations and its influence on mating performance in Dorper rams, S. Afr. J. Anim Sci., 17, 63
Skinner, 1971, Post-natal development of the reproductive tract in the Dorper ram, Agroanimalia, 3, 7
Snyman, 1998, Genetic and phenotypic correlations of total weight of lamb weaned with body weight clean fleece weight and mean fibre diameter in three South African Merino flocks, Livest. Prod. Sci., 55, 157, 10.1016/S0301-6226(98)00119-5
Snyman, M.A., Herselman, M.J., Cloete, J.A.N., 1996. Carcass characteristics of Namaqua Afrikaner lambs. Joint symposium, South African Society of Animal Science–Developing Areas Branch, Rare Breeds International and Association for the Conservation of Early Domesticated Animals, Pilansberg, 30 Sept –3 Oct 1996.
Snyman, M.A., Jackson-Moss, C.A., 1998. A comparison of the leather produced from ten different reeds of sheepskin. Unpublished Research Report. Grootfontein Agricultural Development Institute, Private Bag X 529, Middelburg 5900, South Africa.
Stafford, 1991, Sheep production in Zambia, Bull. Anim. Health Prod. Afr., 39, 61
Strydom, P.E., Vermeulen, J.H., Nel, E., De Bruyn, J.F., 1995. Production and reproduction of two types of Dorper sheep (in Afrikaans). Research report available at the Dorper Sheep Breeder’s Society of South Africa, P.O. Box 26, Middelburg 5900, South Africa.
Taljaard, 1991, The effect of the laparoscopic insemination technique on the oestrus cycle of the ewe, J. S. Afr. Vet. Assoc., 62, 60, 10.4102/jsava.v62i2.1592
Terblanche , E., 1979. Know our small stock breeds (in Afrikaans). Printed by Human and Rousseau, Cape Town/ Pretoria.
Terblanche, 1973, Influence of crop feeding and supplementary feeding on weight gain and carcass grading of Dorper lambs (in Afrikaans), Agroanimalia, 5, 1
Van Niekerk, A., 1998. The evaluation of five mating seasons per year for Dorpers at Kalahari research station. Agicola 1998, in press.
Van Niekerk, 1965, Duration of pregnancy and of post-partum anoestrus in autumn mated Dorper, Dohne Merino and Merino ewes, Proc. S. Afr. Soc. Anim. Prod., 4, 205
Van Niekerk, W.A., Steenkamp, K., 1995. Comparison of three types of Dorper lambs (wool-, hair- and intermediate type) with regard to growth, feed and water intake, protein and fat metabolism (in Afrikaans). Research report available at the Dorper Sheep Breeder’s Society of South Africa, P.O. Box 26, Middelburg 5900, South Africa.
Van Zyl, 1987, Some aspects of superovulation and fertilisation of Dorper sheep, J. S. Afr. Vet. Assoc., 58, 3
Von Seydlitz, 1996, Comparison of the meat and carcass characteristics of the Karakul, Damara and Dorper, Agricola, 1996, 49
Vosloo, 1969, Influence of level of nutrition during gestation and lactation on post-partum interval to ovulation and rebreeding of ewes, Proc. S. Afr. Soc. Anim. Prod., 8, 145
Webb, 1992, Subcutaneous fatty acid responses to differing nutritional energy levels in Dorper and SA Mutton Merino wethers, Prog. Proc. S. Afr. Soc. Anim. Prod., 31, P3
Webb, E.C., Casey, N.H., Bosman, M.J.C., Van Niekerk, W.A., 1991. Influence of dietary energy levels and breed on sensory properties of lamb. Proc. S. Afr. Soc. Anim. Prod. 30, Port Elizabeth, South Africa.
Webb, 1994, The correlations between subcutaneous fatty acid profiles and sensory characteristics of mutton, Proc. S. Afr. Soc. Anim. Sci., 33, 102