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Now showing items 11-15 of 15
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 ...
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 ...