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Herd management information systems to support cattle population research: The VAMPP® case
(Universidad de Costa Rica, 2020-04-01)
Introduction. Livestock information systems, besides being indispensable for the daily management of the herd, can serve as a basis for research at the population level. Objective. The objective of the study was to analyze ...
Evaluación genética de ganado lechero identificación de vacas Holstein elite-Setiembre 2016
(Universidad Nacional, Costa Rica, 2016-09)
Se presentan las listas de las mejores 50
vacas de raza Holstein según su mérito genético para
Producción de Leche-PTAL (Lista 1) y su Mérito
Económico Relativo-MER (Lista 2) de acuerdo con la
última evaluación realizada.
Evaluación genética de ganado lechero identificación de vacas Holstein elite-marzo 2016
(Universidad Nacional, Costa Rica, 2016-03)
Se presentan las listas de las mejores 50
vacas de raza Holstein según su mérito genético para
Producción de Leche-PTAL (Lista 1) y su Mérito
Económico Relativo-MER (Lista 2) de acuerdo con la
última evaluación realizada.
Additive genetic and heterosis effects for milk fever in a population of Jersey, Holstein × Jersey, and Holstein cattle under grazing conditions
(FASS Inc. and Elsevier Inc., 2018-10)
The aim of this study was to estimate additive genetic and heterosis effects for milk fever (MF) in Costa Rican dairy cattle. A farm-based management information software was used to collect 223,783 parity records between ...
Factors associated with Neospora caninum serostatus in cattle of 20 specialised Costa Rican dairy herds
(Elsevier B.V, 2002-04-15)
Twenty-five specialised Costa Rican dairy farms (located in the Poás area) were used to determine neosporosis seroprevalence and the association of seropositivity with environmental and management factors. The farms involved ...
Effect of neosporosis on productive and reproductive performance of dairy cattle in Costa Rica
(Elsevier B.V, 2005-12)
A cross-sectional study was conducted to assess the effect of neosporosis on productive and reproductive parameters in dairy cows. Cows (n = 2743) from 94 farms located in the most important dairy areas in Costa Rica were ...
Economic values for production and functional traits in Holstein cattle of Costa Rica
(Elsevier Science B.V., 2001-08-20)
Economic values for production traits (carrier, fat, protein, and dressing percentage) and functional traits (conception rate,
survival rate, body weight, and rumen capacity) were calculated for Holstein cattle of Costa ...
Effect of a killed whole Neospora caninum tachyzoite vaccine on the crude abortion rate of Costa Rican dairy cows under field conditions
(Elsevier B.V, 2004-06-04)
A standard field trial was carried out to assess the effect of a commercial Neospora-vaccine based on
whole killed tachyzoites (Bovilis–Neoguard, Intervet1) on the abortion rate. Eight hundred and
seventy-six cows, over ...
Epidemiology of bovine anaplasmosis in dairy herds from Costa Rica
(Elsevier, 2011)
Bovine anaplasmosis is endemic and occurs in almost all areas of livestock production of
Costa Rica. The aim of this study was to determine the seroprevalence and risk factors of
anaplasmosis in dairy farms of Costa Rica ...
Management factors related to calf morbidity and mortality rates
(Elsevier B.V, 1990)
An observational epidemiological study was carried out on 63 commercial Dutch dairy farms. The relationship between managerial procedures and morbidity and mortality patterns in 1037 dairy calves from birth to 4 months of ...