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Abstract

An epidemiological study of risk factors for fetal losses was carried out on 62,403 high-yielding Holstein cows in 29 large highly technified dairy herds in northern Mexico (25°N; 23.5°C mean annual temperature). Multivariate multiple-group response model indicated that fetal losses between 43 and...

Author(s)
Mellado, M.; López, R.; Santiago, Á. de; Veliz, F. G.; Macías-Cruz, U.; Avendaño-Reyes, L.; García, J. E.
Publisher
Springer, Amsterdam, Netherlands
Citation
Tropical Animal Health and Production, 2016, 48, 6, pp 1247-1252
Abstract

A field study involving 7734 Holstein calves from eight large intensive dairy herds in northern Mexico (26° N; 24.2°C mean annual temperature; same location) was conducted to determine factors associated with early postnatal (one to 21-d of age) dairy calf mortality. The effects of season of birth, ...

Author(s)
Mellado, M.; Lopez, E.; Veliz, F. G.; Santiago, M. A. de; Macias-Cruz, U.; Avendaño-Reyes, L.; Garcia, J. E.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Livestock Science, 2014, 159, pp 149-155
AbstractFull Text

Risk factors for stillbirth were studied in a dairy operation in northern Mexico (25°N). Data set consisted of 29406 full term calving records. Factors affecting stillbirths were analyzed using a step-wise multivariable logistic regression models. The predictive indicators of stillbirth risk were:...

Author(s)
Mellado, M.; Chávez, M. I.; Macías-Cruz, U.; Avendaño-Reyes, L.; Carrillo, E.; García, J. E.
Publisher
Spanish National Institute for Agricultural and Food Research and Technology (INIA), Madrid, Spain
Citation
Spanish Journal of Agricultural Research, 2017, 15, 2, pp e0403
Abstract

Heat stress (HS) induces the production of oxygen-derived free radicals associated with deleterious effects on the physiology, pathology and productivity of dairy cows. In order to evaluate physiological and productive responses of Holstein cows during summer and winter in an arid area, 40...

Author(s)
Anzures-Olvera, F.; Macías-Cruz, U.; Álvarez-Valenzuela, F. D.; Correa-Calderón, A.; Díaz-Molina, R.; Hernández-Rivera, J. A.; Avendaño-Reyes, L.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2015, 47, 1, pp 15-20
Abstract

The main objective of this study was to assess the effect of month of breeding on reproduction performance of Holstein heifers and cows inseminated with sex-sorted or conventional semen in a hot environment. Pregnancy per artificial insemination (P/AI; 64,666 services over an 8-year period) both in ...

Author(s)
Mellado, M.; Sepulveda, E.; Macias-Cruz, U.; Avendaño, L.; Garcia, J. E.; Veliz, F. G.; Rodríguez, A.
Publisher
Springer, Amsterdam, Netherlands
Citation
Tropical Animal Health and Production, 2014, 46, 1, pp 265-269
Abstract

Heat stress generates a significant economic impact for the dairy industry in arid and semi-arid regions of the world, so that heat abatement is an important issue for dairy producers. The objective of this study was to evaluate effects of two short-term cooling periods on physiological and...

Author(s)
Avendaño-Reyes, L.; Hernández-Rivera, J. A.; Álvarez-Valenzuela, F. D.; Macías-Cruz, U.; Díaz-Molina, R.; Correa-Calderón, A.; Robinson, P. H.; Fadel, J. G.
Publisher
Springer-Verlag GmbH, Berlin, Germany
Citation
International Journal of Biometeorology, 2012, 56, 6, pp 993-999

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