Application of immunocastration in a commercial Dohne Merino ram flock before weaning
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چکیده
منابع مشابه
Reproductive performance of commercial Merino, Dohne Merino and SA Mutton Merino flocks in the Southern Cape
Data of 23 189 Merino ewes (8 farms), 7692 Dohne Merino ewes (3 farms) and 2399 SA Mutton Merino ewes (1 farm) were recorded for the 1988-1991 lambing seasons. The udders of ewes present at lamb marking were inspected to differentiate between barren (unlambed), lambed and lost (lambed ewes suckling no progeny), and wet (lambed and suckling ~ 1 lamb) ewes, using the 'wet and dry' technique. The ...
متن کاملWeaning Weights in a Range Purebred Merino and Crossbred Merino x Rambouillet Flock
The Rafter 7 Merino flock was initiated in Nevada in 1990 with the purchase of 500 purebred Rambouillet ewes. A gradeup program was initiated using Australian Merino genetics with the aim of developing a purebred Merino flock. Early in the project the Rafter 7 Merino line was created, which is approximately 5/8 Merino and 3/8 Rambouillet and has been a closed line since 1999. In a genetic selec...
متن کاملTemporal changes in the neonatal recognition cue of Dohne Merino lambs (Ovis aries).
The strong bond that is formed between ewe and lamb after parturition is important for lamb survival. Evidence exists that the ewe mainly employs olfactory recognition cues to distinguish her lamb from other lambs in the flock. We have found that volatile organic compounds in the wool of Merino lambs that presumably constitute the neonatal recognition cue in sheep undergo temporal changes, at l...
متن کاملGenetic Parameters for Body Weight, Carcass and Wool Traits in Dohne Merino
The Dohne Merino was introduced to Australia as a dual-purpose (wool and meat) breed at the end of 1990s with very limited genetic parameters available. Up to 373,639 records per trait were used to estimate genetic parameters for eight traits in this study. Heritability estimates ( ± s.e.) were 0.34 ± 0.02 for weaning weight (Wwt), 0.27 ± 0.01 for yearling weight (Ywt), 0.13 ± 0.01 for yearling...
متن کاملAge of Weaning and Parasitism in Merino Lambs
Merino lambs born in September and October 1964 were weaned at 4, 6 and 11 weeks of age, at average liveweights of 9 kg, 12 kg, and 19 kg respectively, on to a pasture of phalaris and white clover. The lambs remaining with their mothers for 11 weeks showed the earliest onset of an appreciable worm infection which reached a peak in December about one month after weaning. Similar levels of infect...
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ژورنال
عنوان ژورنال: South African Journal of Animal Science
سال: 2019
ISSN: 2221-4062,0375-1589
DOI: 10.4314/sajas.v48i6.15