Conception rate and fecundity of Dohne Merino ewes in a continuous mating system
نویسندگان
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 ...
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The present study was designed to investigate the impact of exogenous administration of GnRH (Receptal VET®, Intervet Pharmaceuticals Ltd., India) on serum progesterone profile and conception rates during mid luteal phase of estrous cycle in buffaloes. Estrus was induced using Cyclix 2 mL. i/m. (Intervet India Pvt. Ltd., India) and animals were bred naturally during observed estrus. The buffalo...
متن کاملThe Repeatability of Ovulation Rate in Merino Ewes
The ovaries of 3 groups of Merino ewes were examined for corpora lutea by laparoscopy every 17 days between 28.3.74 and 16.6.75. During the 1974 breeding season the mean body weight of the ewes was maintained at 37 kg. Between the 1974 and -1975 breeding seasons the nutrition of the ewes was varied to give groups of ewes with mean body weights of 37, 41 and 46 kg; groups of ewes of low, medium ...
متن کاملLifetime Reproductive Performance of Booroola Merino X Romney Ewes of Differing Genotype for the Booroola Fecundity Gene and Romney Ewes
First cross Booroola Merino x Romney (B x R) ewes born in 1975, 1976, 1978 and 1979 were classified as being heterozygous (F+) or non carriers (++) for the Booroola fecundity gene. Their performance as hoggets (< 1 year of age) I and to six years of age (1975 and 1976 bornonly) was compared with contemporary Romney (R) ewes. As hoggets, the F+ ewes had ovulation rates about 0.5 higher than ++ B...
متن کاملPrecision nutrition for Merino ewes
Automatic monitoring of liveweight and weight change is now possible with walk–through weighing systems. Computer–based drafting can incorporate a range of measurements such as pregnancy status, past performance, value–for–wool and value–for–meat to implement decisions on supplementary feeding. The combination of these technologies will provide the option of allocating animals likely to give th...
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ژورنال
عنوان ژورنال: South African Journal of Animal Science
سال: 2015
ISSN: 2221-4062,0375-1589
DOI: 10.4314/sajas.v44i5.13