Resultados de búsqueda - Cattle. Periodicals.

Effects of trypanosomiasis on growth and mortality of young East African Zebu cattle exposed to drug-resistant trypanosomes por Rowlands, G.J., Mulatu, W., Authié, Edith, D'Ieteren, G.D.M., Leak, S.G.A., Nagda, S.M.

“…All these effects of trypanosomiasis on productivity, however, were temporary and animals later compensated for periods of poor growth. Regualr trypanocidal chemotherapy in a situation of high levels of drug resistance may have helped to maintain the health and productivity of these young cattle.…”
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Drug sensitivity of trypanosome populations from cattle in a peri-urban dairy production system in Uganda por Olila, D., McDermott, John J., Eisler, M.C., Mitema, E.S., Patzelt, R.J., Clausen, Peter-Henning, Poetzsch, C.J., Zessin, K.H., Mehlitz, D., Peregrine, A.S.

“…Cattle from 50 farms in Mukono County, Uganda, were monitored for trypanosomes every second month over an 18-month period (1995–1996) by mini-anion exchange chromatography and haematocrit centrifugation techniques. …”
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Leucaena hedgerow intercropping and cattle manure application in the Ethiopian highlands. II. Maize yields and nutrient uptake por Lupwayi, N.Z., Haque, I., Saka, A.R., Siaw, D.E.K.A.

“…The hedges are pruned periodically during the cropping period and the prunings are added to the soil as green manure. …”
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Application of principal component analysis for classifying East Coast fever reactions in cattle challenged with Theileria parva por Rowlands, G.J., Musoke, A.J., Nene, Vishvanath M., Bishop, Richard P., Nagda, S.M., Morzaria, S.P.

“…The extension of the method to 133 cattle exposed to natural tick challenge, for which incubation periods are unknown and white blood cell count is impracticable to measure, is also described. …”
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Comparative parasite development in African buffalo and N'Dama cattle infected with either Trypanosoma congolense or T. vivax por Olubayo, R.O., Moloo, S.K., Naessens, Jan

“…Several parmaeters suggested that the buffaloes were much more resistant to trypanosomiasis than the N'Dama cattle: They had a much longer prepatent period, their parasitemia levels were lower (about 100 fold in T. congolense) and anemia, measured as a drop in PCV (packed cell volume), was either very short (T. congolense) or not present (T. vivax) in buffaloes. …”
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A review of cardiac blackleg in cattle, and report of 2 cases without skeletal muscle involvement in Argentina por Morrell, Eleonora Lidia, Odriozola, Ernesto Raul, Dorsch, Matías, Fiorentino, María Andrea, Rivera, María, Poppenga, Robert, Navarro, Mauricio, Uzal, Francisco, Canton, German Jose

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Evaluation of bonding and maternal behaviours in cattle : swedish dairy cows in a cow-calf contact system por Svensson, Elin

Genetic and environmental variation in reproductive and lactational performance of Jersey cattle in the coastal lowland semi-humid tropics por Njubi, D.M., Rege, J.E.O., Thorpe, W.R., Collins-Lusweti, E., Nyambaka, R.

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Phenotypic and genetic trends of reproductive post-weaning growth: Cow productive traits in Kenyan Boran cattle por Okeyo Mwai, Ally, Mosi, R.O., Rege, J.E.O., Shibre, M.

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Growth, reproductive, and productive performance of Begait cattle under different herd management systems in northern Ethiopia por Mezgebe, Gebretnsae, Gizaw, Solomon, Urge, Mengistu

“…The performance of indigenous Begait cattle (498 cows, 284 calves, and 48 heifers) in northern Ethiopia was studied. …”
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Analyses of herd offtake and marketing of live and dressed trypanotolerant cattle: A case study from the Gambia por Agyemang, K., Clifford, D.J., Barrow, A., Corr, N., Dwinger, R.H.

“…Data on approximately 4,000 head of N'Dama cattle kept in 60 herds under traditional management systems in The Gambia were analysed to estimate annual herd offtake rates during a 5 year period (1986-1990). …”
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Characterization of Trypanosoma congolense serodemes in stocks isolated from cattle introduced into a ranch in Kilifi, Kenya por Masake, R.A., Nantulya, V.M., Musoke, A.J., Moloo, S.K., Nguli, K.

“…A herd of 20 cattle was introduced on a ranch in Kilifi, Coast Province of Kenya, where they were in contact with Glossina austeni for 6 months. …”
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Population dynamics of ticks on indigenous cattle in a pastoral dry to semi-arid rangeland zone of Uganda por Okello-Onen, Joseph, Tukahirwa, E.M., Perry, Brian D., Rowlands, G.J., Nagda, S.M., Musisi, G., Bode, E., Heironen, R., Mwaji, W., Opuda-Asibo, J.

“…Studies on seasonality and population dynamics of ticks on indigenous cattle and their crosses (calves) were carried out in Buruli Ranching Scheme, Nabiswera, Luwero District of Uganda on three treatment groups of animals: group 1 (twice a week dipping), group 2 (once a month dipping) and group 3 (no tick control). …”
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Effect of nocturnal grazing and supplementation on diet selection, eating time, forage intake and weight changes of cattle por Ayantunde, Augustine A., Fernández Rivera, S., Hiernaux, Pierre H.Y., Keulen, H. van, Udo, H.M.J., Chanono, M.

“…Night grazing improves dry season performance and its effect decreases when cattle are supplemented.…”
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Whole Cottonseed as an Effective Strategy to Mitigate Enteric Methane Emissions in Cattle Fed Low-Quality Forages por Hernandez, Olegario, Lopez, Agustin, Ceron Cucchi, Maria Esperanza, Alabi, Cham Donald AdégbéÏga, Loza, Cecilia, Juárez Sequeira, Ana Verónica, Fissolo, Hector Miguel, García, Elisa Mariana, Gere, José Ignacio

“…Twenty-four Braford heifers were randomly allocated into four pens (three animals per pen) per treatment over two experimental periods. Methane emissions were measured using the SF₆ tracer technique. …”
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The patterns of admixture, divergence, and ancestry of African cattle populations determined from genome-wide SNP data por Gebrehiwot, N.Z., Strucken, E.M., Aliloo, H., Marshall, Karen, Gibson, John P.

“…The AfricanBos tauruspopulations showed substantial genetic diversity, and other indigenous breeds show evidence of having more than one African taurine ancestor.Neestimates based onr2andr2adjshowed a decline inNefrom a large population at 2000 generations ago, which is surprising for the indigenous breeds given the expected increase in cattle populations over that period and the lack of structured breeding programs.African indigenous cattle breeds have a large genetic diversity and are either pure AfricanBos taurusor admixtures of AfricanBos taurusandBos indicus.This provides a rich resource of potentially valuable genetic variation, particularly for adaptation traits, and to support conservation programs. …”
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Performance evaluation of highly admixed Tanzanian smallholder dairy cattle using SNP derived kinship matrix por Mujibi, F.D.N., Rao, E.J.O., Agaba, Morris, Nyambo, D., Cheruiyot, E.K., Kihara, Absolomon, Zhang, Yi, Mrode, Raphael A.

“…We surveyed 654 smallholder dairy households over a one-year period and grouped them into production clusters. …”
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Economic evaluation of current and alternative dual-purpose cattle systems for smallholder farms in the central Peruvian highlands por Bartl, K., Mayer, A.C., Gómez, C.A., Muñoz, E., Hess, H.D., Holmann, Federico J.

“…In four communities in the Peruvian Andes, 56 farmers were interviewed every three months over a period of one year. Information linked to milk and cattle production such as activities, inputs (labour, means of production, capital) and outputs (milk, cheese, animals) were recorded using a closed-ended questionnaire. …”
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The carbon footprint of young-beef cattle finishing systems in the Eastern Plains of the Orinoco River Basin of Colombia por Ramírez Restrepo, Carlos Alberto, Vera-Infanzón, Raul R., Rao, Idupulapati M.

“…However, under a more optimistic scenario, these beef systems could accomplish substantial net gains of soil C, over the period for which field data are available. Overall, this study projects the positive impact of the design of plausible fattening strategies on grasslands for improving cattle productivity and reducing emission intensities with concomitant increases in technical efficiency.…”
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Strategic control of the cattle tick Rhipicephlaus microplus applied to rotational and silvopastoral grazing systems in subtropical areas por Nava, Santiago, Rossner, Maria Victoria, Toffaletti, Jose Rodolfo, Da Luz, Miguel, Rossner, Maria Belen, Signorini Porchiett, Marcelo Lisandro, Morel, Nicolas

“…This work evaluated if strategic control based on no more than three or four annual treatments is useful to control Rhipicephalus microplus infestations on cattle when it is applied to intensive rotational grazing and silvopastoral systems with high stocking rates in subtropical areas. …”
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