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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

The objective of this study was to determine the physiological, endocrine and productive response in lactating dairy cows under several series of artificial cooling at the beginning of the summer (June to July, 2011). Fourteen multiparous Holstein cows were assigned in one of two treatments:...

Author(s)
Leyva-Corona, J. C.; Thomas, M. G.; Rincón, G.; Medrano, J. F.; Calderón, A. C.; Avendaño-Reyes, L.; Hallford, D. M.; Rivera-Acuña, F.; Luna-Nevárez, P.
Publisher
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City, Mexico
Citation
Revista Mexicana de Ciencias Pecuarias, 2016, 7, 4, pp 415-429
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

Beta-adrenergic agonists (β-AA) have been shown to positively impact finishing performance and some carcass traits of feedlot cattle. Our objective was to evaluate the efficacy of a β-AA on the basis of zilpaterol hydrochloride (Grofactor, Laboratorios Virbac México, Guadalajara, Mexico) on growth...

Author(s)
Avendaño-Reyes, L.; Meraz-Murillo, F. J.; Pérez-Linares, C.; Figueroa-Saavedra, F.; Correa, A.; Álvarez-Valenzuela, F. D.; Guerra-Liera, J. E.; López-Rincón, G.; Macías-Cruz, U.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2016, 94, 7, pp 2954-2961
Abstract

The objective of this work was to obtain prevalence estimates of cloudy vaginal mucus in artificially inseminated Holstein cows raised under intense heat, in order to assess the effect of meteorological conditions on its occurrence during estrus and to determine its effect on conception rate. In a...

Author(s)
Mellado, M.; Lara, L. M.; Veliz, F. G.; Santiago, M. Á. de; Avendaño-Reyes, L.; Meza-Herrera, C.; Garcia, J. E.
Publisher
Empresa Brasileira de Pesquisa Agropecuária, Brasilia, Brazil
Citation
Pesquisa Agropecuária Brasileira, 2015, 50, 6, pp 492-498
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

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
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
Abstract

Oestrus was synchronised in 28 heifers in Mexico, aged 15-18 months. Heifers with a high or low reproductive score were given oral treatment with MGA for 14 days, followed by an injection of PGF2α 19 days later (groups 1A and 1B respectively) or were treated with Crestar (norgestoment plus...

Author(s)
Quezada Casasola, A.; Ramírez Godínez, A.; Pérez Casio, F.; Avendaño Reyes, L.; Hallford, D. M.
Publisher
Asociación Interciencia, Caracas, Venezuela
Citation
Interciencia, 2004, 29, 11, pp 638-642
Abstract

Holstein cattle performance is negatively affected by heat stress conditions. The objective of the present study was to determine the effect of a spray and fan cooling system on lactating cows performance under hot environment temperatures at Mexicali Valley, Baja California. Sixty one cows (2 to 5 ...

Author(s)
Correa-Calderón, A.; Avendaño-Reyes, L.; Rubio-Villanueva, A.; Armstrong, D. V.; Smith, J. F.; DeNise, S. K.
Publisher
Colegio de Postgraduados, Montecillo, Mexico
Citation
Agrociencia (Montecillo), 2002, 36, 5, pp 531-539

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