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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 ...
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 ...
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 ...
Event-time analysis of reproductive traits of dairy heifers
(Elsevier, 1998-11)
Data on the reproductive traits of dairy heifers
were analyzed using event-time techniques. Traits
analyzed were age at first calving (n = 4631), days to
first breeding, and days open (n = 1992) during the
first ...
Analysis of test day yield data of Costa Rican dairy cattle
(Elsevier, 1998)
Estimates of variance components for test day
records in an animal model that considered multiple
traits over multiple lactations were calculated using
REML methodology. Test day records were classified
into 11 periods ...
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 ...
Detección del Virus de la Leucosis Bovina en semen de toros en Costa Rica
(Universidad Nacional, Costa Rica, 2019)
La leucosis bovina enzoótica (LBE) es una enfermedad infecciosa incurable causada por el virus de
la leucosis bovina (BLV) que infecta los linfocitos B y que se transmite sobre todo mediante
transferencia de sangre. El ...
Pasantía de Salud de Hato en fincas de Lechería Especializada de Vara Blanca, Poasito (Alajuela) y Los Cartagos (Heredia) bajo supervisión del Dr. Frank Hückmann Voss. Modalidad: Pasantía
(Universidad Nacional, Costa Rica, 2022)
Se llevó a cabo una pasantía enfocada en Salud de Hato bajo la supervisión del Dr.
Frank Hückmann Voss, el cual es un destacado médico veterinario enfocado en dicho
tema. La pasantía se inició el 14 de febrero y se ...