Browsing Facultad de Ciencias de la Salud by Author "VAN ARENDONK, J.A.M."

Now showing items 1-3 of 3

    • Event-time analysis of reproductive traits of dairy heifers 

      VAN DER LENDE, T.; Baaijen, Veerle M.; VAN ARENDONK, J.A.M.; Vargas, Bernardo (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 ...

    • Genetic comparison of breeding schemes based on semen importation and local breeding schemes: framework and application to Costa Rica 

      VAN ARENDONK, J.A.M.; Vargas, Bernardo (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 

      Koops, W. J.; Herrero, M.; VAN ARENDONK, J.A.M.; Vargas, Bernardo (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 ...