Resultados de búsqueda - Cattle. Periodicals.

ECG and heart rate determination in fetal cattle using a digital signal processing method por Chen WenXi, Nemoto, T., Kobayashi, T., Saito, T., Kasuya, E., Honda, Y.

“…The method was tested on 10 pregnant Holstein cows at gestational periods ranging from 136 to 224 days. The results show that this method can extract the fetal ECG and determine the fetal HR from the raw noisy measurement data. …”
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Survival, growth and reproductive performance in F1 crossbred cattle produced and managed on station in the Gambia por Diack, A., Sanyang, F.B, Corr, N.

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Linkages between criteria of trypanotolerance and livestock performance traits in N'Dama cattle in the Gambia. Abstract por Agyemang, K.

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Production characteristics of Angoni cattle in Mozambique: 2. Non-genetic influences on fertility, survivability and productivity por Tomo, P.S.M., Tawah, C.L., Swanepoel, F.J.C., Hoogenboezem, J.M.

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Valuing indigenous cattle breeds in Kenya: An empirical comparison of stated and revealed preference value estimates por Scarpa, R., Ruto, E.S.K., Kristjanson, Patricia M., Radeny, Maren A.O., Drucker, Adam G., Rege, J.E.O.

“…We compare value estimates for cattle attributes from CEs data with those from hedonic analysis of actual transactions by the same population of traders, in the same markets and over the same period. …”
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Long-term occurrence of Trypanosoma congolense resistant to diminazene, isometamidium and homidium in cattle at Ghibe, Ethiopia por Mulugeta, W., Wilkes, J., Mulatu, W., Majiwa, Phelix A.O., Masake, R., Peregrine, A.S.

“…These data indicate that in February 1993 there was a high prevalence of drug-resistant trypanosome populations with different chromosome profiles in cattle at Ghibe. Since a similar situation existed at the same site in July 1989, this suggests that drug-resistance phenotype of trypanosomes at Ghibe had not altered over a 4 year period.…”
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Studies on cattle milk and meat production in Fogera Woreda: production systems, constraints and opportunities for development por Anteneh, B.T.

“…The reported critical constraints of traditional cattle production were seasonal feed shortage, high disease prevalence challenges, lack of crossbreeds, lack of working capital and lower demand for dairy and beef products due to long fasting periods and lower purchasing power of the consumers.…”
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Extension and its effect on dairy cattle nutrition and productivity in smallholder dairy enterprises in Kiambu District. por Wambugu, M.N.

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Effect of reseeding and cattle manure on pasture and livestock water productivity in rangelands of Nakasongola District, Uganda por Mugerwa, S.

“…Data on soil nutrient status and pasture productivity was collected over a period of one year covering two dry seasons and two wet seasons. …”
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Effects of social separation on cortisol, milk yield and composition, udder health and behaviour in dairy cattle por Hernández Verduzco, Carlos Eduardo

“…This study suggests a time lag between plasma and saliva cortisol values and this should be considered when using saliva samples as the only measure of the stress response in cattle.…”
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Genetic evaluation of birth and weaning weight of Gudali and two-breed synthetic Wakwa beef cattle populations under selection in Cameroon: Genetic and phenotypic parameters por Tawah, C.L., Mbah, D.A., Rege, J.E.O., Oumate, H.

“…Performance data covered the period 1971 through 1985. Heritability estimates for direct effects of live weights at birth and weaning were 0.39 and 0.27 in Gudali cattle and 0.65 in Wakwa cattle, respectively. …”
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Diversity and functional analysis of rumen and fecal microbial communities associated with dietary changes in crossbreed dairy cattle por Kibegwa, F.M., Bett, R.C., Gachuiri, C.K., Machuka, Eunice M., Stomeo, Francesca, Mujibi, F.D.

“…We also explored fecal samples as a proxy for rumen liquor samples. Six crossbred dairy cattle were reared on three diets with an increasing concentrate and reducing roughage amount in three consecutive 10-day periods. …”
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Genetic analysis of preweaning growth in indigenous Gudali cattle under a long-term selection programme por Tawah, C.L., Rege, J.E.O., Mbah, D.A.

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Comportement saisonnier du betail zebu en Adamaoua Camerounais. I. Etude des femelles adultes:comparaison de la race locale aux metis demi-sang Brahma por Lhoste, Philippe

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Ovarian follicular dynamics in purebred and crossbred Boran cows in Ethiopia por Degefa, T., Lemma, Alemayehu, Jemal, J., Mamo, G., Tegegne, Azage, Youngs, C.

“…Boran is an endangered breed of cattle indigenous to Ethiopia and the relatively poor understanding of its reproductive physiology has impeded efforts to maximize reproductive performance of the breed. …”
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Testicular size and sperm output in Holstein-Friesian and N'Dama bulls por Nwakalor, L.N., Orji, B.I.

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Use of progesterone in early detection of open cows in smallholder dairy farms in Nakuru District of Kenya por Indetie, D., Indetie, A., Kinyua, J., Ojango, N., Perera, O.

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On-farm performance of Bunaji (White Fulani) cattle. 2. Growth, reproductive performance, milk offtake and mortality por Rege, J.E.O., Kaufmann, Ralph R. von, Mwenya, W.N.M., Otchere, E.O., Mani, R.I.

“…An on-farm study was conducted over a 12-year period (1979 through 1990) at four locations in the subhumid zone of Nigeria to estimate levels of performance of Bunaji cattle and to examine factors affecting productivity in these production systems. …”
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A Case Study Evaluating Economic Implications of Two Grazing Strategies for Cattle Ranches in Northwest Argentina por Quiroga, Raul Emiliano, Blanco, Lisandro Javier, Ferrando, Carlos Alberto

“…In the Argentinean Chaco Arido region, cattle production based on cow–calf operations is the principal source of agricultural income, and rangeland is the main forage source for cattle. …”
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Sucrose supplements in cattle given grass silage-based diet. 2. Digestion of cell wall carbohydrates por Khalili, H., Huhtanen, P.

“…Degradation characteristics of silage DM, NDF and ADF were studied by incubating samples in nylon bags in the rumen for different periods. Sucrose supplements increased duodenal flow of NDF (P 0.1), ADF (P 0.05), cellulose (P 0.05) and hemicellulose (P 0.01) compared with diet C. …”
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