Results 131 to 140 of about 5,585 (174)
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A comparison of field tick infestation on N'Dama, Zebu and N'Dama×Zebu crossbred cattle
Veterinary Parasitology, 1993Tick burdens, estimated from cumulative tick counts, were determined on N'Dama, Zebu and F1 N'Dama x Zebu crossbred cattle. N'Dama showed significantly fewer ticks than the Zebu and F1 cattle (P < 0.001). A previous trypanosomosis infection did not affect tick burdens on the three genotypes.
R C, Mattioli +4 more
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The Zebu Cattle of East Africa
The East African Agricultural Journal, 1955(1955). The Zebu Cattle of East Africa. The East African Agricultural Journal: Vol. 21, No. 2, pp. 83-95.
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Reproductive performance of Zebu cattle in Mexico
Theriogenology, 1991Abstract Clinical observations were carried out on 32 and 38 nonpregnant Zebu females during the rainy and the dry season, respectively. Of the animals studied, 18 from the rainy season group and 13 from the dry season group failed to show estrus. The length of proestrus, estrus, and the ostrous cycle as well as ovulation time were determined only in
C. Lamothe-Zavaleta +2 more
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A study of the habits of zebu cattle in Tanganyika
The Journal of Agricultural Science, 19621. The habits of five Tanganyika Shorthorn zebus and their suckling calves were studied during periods of 72 consecutive hours at monthly intervals in each of the first 6 months of the calves' lives, during the ‘dry’ season of the year.2. Cows grazed for 7·16 hr.
H. G. Hutchison +4 more
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Seasonal fluctuations of reproductive functions in Zebu cattle
International Journal of Biometeorology, 1972Analysis of breeding records from a large, well managed Zebu cattle (BOS INDICUS) herd in the Mexican Gulf Coast area and calculation of Spearman rank correlations with local meteorological data (monthly means for temperature, pressure, precipitation, humidity) revealed significant seasonal fluctuations in reproductive functions.
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Breed and Heterosis Effects of American Zebu Cattle
Journal of Animal Science, 1980The Brahman (American Zebu) has been evaluated in numerous crossbreeding studies throughout the Southern United States. Brahman females producing straightbred calves have usually been found to have a lower calving percentage, calf survival rate and weaning rate than other contemporary straightbreds, although they have been reported to be superior or ...
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Efective Crossbreeding Systems Utilizing Zebu Cattle
Journal of Animal Science, 1980The basic objectives and procedures for successful crossbreeding of beef cattle were considered, with special reference to the levels of realized hybrid vigor that might be anticipated for different crossbreeding programs involving the American Brahman (Z1) and European (Ej) breeds. Intralocus heterozygosis levels with respect to breed origin of genes (
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The evolution of tropical adaptation: comparing taurine and zebu cattle
Animal Genetics, 2010SummaryBeef cattle breeds consist of three major genetic subdivisions. The taurine group is adapted to temperate environments, and the zebu and Sanga groups are both adapted to tropical environments. With the advent of genotyping and sequencing technologies in agriculture, genome‐wide exploration of the genetic basis for the differences in tropical ...
Chan, Eva +2 more
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A note on the crossbreeding of Zebu cattle in vom
Animal Science, 1990A study was carried out on data collected between 1970 and 1979 on the crossbreeding of cattle in Vom using British Friesian, Brown Swiss and Jersey bulls. Only crossbreeding involving Friesian bulls was successful. There were progressive increases in lactation yield, yield per day of lactation length, lactation length, daily fat yield, birth weight ...
S. T. Mbap, L. O. Ngere
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Evaluation of the incorporation of GnRH into a superovulatory regimen for Zebu cattle
Theriogenology, 1991The objective of this study was to evaluate the utilization of gonadotropin releasing hormone (GnRH) as part of a superovulatory regimen for Zebu cattle. Forty Zebu cows were superovulated with 40 mg of follicle stimulating hormone-pituitary (FSH-P) divided in eight fractions of 5 mg injected at 12-h intervals.
E, Posadas +3 more
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