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Abstract

Reproductive data collected from 13 medium-size goat farms in central Mexico (582 goats), were used to investigate if linear type traits influenced reproductive performance of high-yielding dairy goats. Data were analysed using multiple stepwise forward logistic regressions. Goats with the higher...

Author(s)
Mellado, M.; Mellado, J.; Valencia, M.; Pittroff, W.
Publisher
Blackwell Publishing, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2008, 43, 5, pp 599-605
Abstract

To study the effect of along daily photoperiod on milk yield and milk components, 38 pluriparous lactating Saanen goats were randomly exposed, after kidding, to either a natural photoperiod (<13 h) or a long photoperiod (16 h) between January and April. Long daily photoperiod increased...

Author(s)
Véliz, F. G.; Mellado, M.; Carrillo, E.; Meza-Herrera, C. A.; Rivas-Muñoz, R.
Publisher
Garuda Scientific Publications, Izatnagar, India
Citation
Journal of Applied Animal Research, 2009, 36, 2, pp 287-290
Abstract

Pregnancy rates of a Beefmaster herd with improved management in the east coast of Mexico under intense heat load during most part of the year (THI range=56-102) were evaluated, using the GENMOD procedure of SAS, with respect to temperature-humidity index (THI) prior or after artificial...

Author(s)
Mellado, M.; Romero, P.; García, J. E.; Véliz, F. G.; Arévalo, J. R.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Livestock Science, 2010, 131, 2/3, pp 149-154
Abstract

Breeding records, including 649 inseminations during fall and winter at a dairy farm in a subtropical area of Western Mexico (24°N; 24°C, mean annual temperature 24°C) were analyzed to document effects of sex-sorted semen from commercial Gyr bulls, estrus synchronization protocol, inseminator, sire ...

Author(s)
Mellado, M.; Coronel, F.; Estrada, A.; Ríos, F. G.
Publisher
Springer, Amsterdam, The Netherlands
Citation
Tropical Animal Health and Production, 2010, 42, 7, pp 1493-1496
Abstract

Records representing data from 1,500 barren Holstein cows over an 8-yr period from a large commercial dairy farm in northern Mexico were analyzed to determine the effects of lactation number and season and year of initiation of lactation on milk production of cows induced hormonally into lactation...

Author(s)
Mellado, M.; Antonio-Chirino, E.; Meza-Herrera, C.; Veliz, F. G.; Arevalo, J. R.; Mellado, J.; Santiago, A. de
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2011, 94, 9, pp 4524-4530
Abstract

Background: High environmental temperature coupled with high humidity can result in reproductive failure in dairy cattle, with a drastic reduction in reproductive efficiency of dairy herds. Objective: To study the effect of high environmental temperature on reproduction performance of Holstein cows ...

Author(s)
Mellado, M.; Sepulveda, E.; Meza-Herrera, C.; Veliz, F. G.; Arevalo, J. R.; Mellado, J.; Santiago, A. de
Publisher
Universidad de Antioquia, Medellín, Colombia
Citation
Revista Colombiana de Ciencias Pecuarias, 2013, 26, 3, pp 193-200
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

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

The prevalence of Brucella antibodies in serum of unvaccinated grazing goats as well as risk factors for brucellosis in northeastern Mexico were evaluated using data from a cross-sectional study between 2002 and 2008. Data were from 99 goat flocks. Serum samples from 12,127 goats were analyzed with ...

Author(s)
Marin, V.; Mellado, J.; Garcia, J. E.; Gaytan, L.; Mellado, M.
Publisher
Israel Veterinary Medical Association, Raanana, Israel
Citation
Israel Journal of Veterinary Medicine, 2016, 71, 4, pp 14-20
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

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