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Now showing items 11-17 of 17
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 ...
Genetic comparison of breeding schemes based on semen importation and local breeding schemes: framework and application to Costa Rica
(American Dairy Science Association, 2004-05-01)
Local breeding schemes for Holstein cattle of Costa
Rica were compared with the current practice based
on continuous semen importation (SI) by deterministic
simulation. Comparison was made on the basis of ge-
netic ...
Modeling extended lactations of dairy cows
(American Dairy Science Association, 2000-06)
Nine mathematical models were compared for their
ability to predict daily milk yields (n = 294,986) in stan-
dard 305-d and extended lactations of dairy cows of
Costa Rica. Lactations were classified by parity ...
Modelo estocástico para estimación de valores económicos de rasgos productivos y funcionales en bovinos lecheros
(Agrociencia, 2009)
En programas de mejoramiento genético es necesario contar con estimadores del valor económico de los rasgos que se desean seleccionar. El objetivo del presente estudio fue construir un modelo estocástico para el cálculo ...
Prácticas de manejo y uso de antiparasitarios internos en fincas lecheras artesanales de Costa Rica
(Universidad Nacional, Costa Rica, 2007)
Con el objetivo de recabar información sobre las prácticas de manejo de antiparasitarios internos y el control de helmintos por parte de los productores, se implementó una encuesta en 60 fincas lecheras de Costa Rica durante ...
Appraisal of the epidemiology of Neospora caninum infection in Costa Rican dairy cattle
(Wageningen Institute of Animal Science, 2005)
Appraisal of the epidemiology of Neospora caninum infection in Costa Rican dairy cattle. In Costa Rica, milk production has increased gradually during the twentieth century, in which the activity developed from a non-technical ...