Adolfo Armando Rayas-Amor
Universidad Autónoma Metropolitana
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Publication
Featured researches published by Adolfo Armando Rayas-Amor.
Meat Science | 2017
G.C. Miranda-de la Lama; L.X. Estévez-Moreno; Wilmer S. Sepúlveda; M.C. Estrada-Chavero; Adolfo Armando Rayas-Amor; M. Villarroel; G.A. María
Increasing concerns about farm animal welfare have led to an increase in the availability of welfare-friendly-products (WFP), but little is known about how much more consumers are willing-to-pay (WTP) for WFP or about their buying trends in Latin America. In this study, a survey was given to 843 meat consumers in the city of Toluca, Mexico. The results show that consumers were interested in farm animal welfare issues and their ethical, sociological and economic implications, as in Europe. The people surveyed also conveyed a high level of empathy with animal feelings and emotions, however they clearly demanded more information and regulations related to farm animal welfare. The majority of respondents expressed that they were WTP more for properly certified WFP, but mostly based on the benefits in terms of product quality and human health. If the demand for WFP begins to increase in Mexico, the supply chain should consider a certification system to guarantee product origin based on current conditions.
Meat Science | 2017
M.H. Romero; L.F. Uribe-Velásquez; J.A. Sánchez; Adolfo Armando Rayas-Amor; G.C. Miranda-de la Lama
The aim of the study was to determine the effects of abattoir type (conventional abattoir -CA- versus modern abattoir -MA-) on stress parameters and risk factors for high muscle pH in Colombia. A total of 522 Zebu young bulls were studied in two groups: 285 at CA, and 237 at MA. Blood samples were taken to measure cortisol, glucose, lactate, creatine kinase, β-hydroxybutyrate, total protein, albumin, creatinine, urea, haematocrit, leukocytes and N/L ratio. Cattle were monitored during the unloading, lairage, handling and stunning. The logistic regression model showed that stocking density, transport time, abattoir type, and inefficient stunning were variables associated with the prevalence of dark cutting carcasses. This study demonstrated that modern improvements at abattoir level, proper infrastructure, and stunning equipment, do not always guarantee quality in terms of animal welfare. As a first attempt in the Colombian beef industry, this research suggested how handling practices could affect cattle welfare and the prevalence of high muscle pH even at MA.
Journal of Veterinary Behavior-clinical Applications and Research | 2017
Adolfo Armando Rayas-Amor; Ernesto Morales-Almaráz; Gustavo Licona-Velázquez; Rodolfo Vieyra-Alberto; Anastacio García-Martínez; Carlos G. Martínez-García; Rosy G. Cruz-Monterrosa; Genaro C. Miranda-de la Lama
ABSTRACT The aim of this study was to validate the recordings of a commercial triaxial accelerometer (HOBO Pendant G data loggers) with respect to visual observations of grazing and ruminating time of dairy cows. Seven lactating Holstein cows with a mean body weight of 602 ± 45 kg were used for the study. Grazing and ruminating times were recorded using HOBO loggers (31.5 hours of total observations for grazing and ruminating) that were attached to the lateral‐medial side of the jaw using a strap attached to the head of each cow in a position such that the X‐axis was parallel to the ground, the Y‐axis was perpendicular to the ground pointing upward, and the Z‐axis was parallel to the ground pointing away from the sagittal plane; these relative positions were defined when the cow was in a natural head‐up position. Median acceleration (m/s2) readings in the X‐axis >0.175 and <0.95 indicated grazing activity, whereas readings in the Z‐axis >−0.275 and <0.0875 indicated ruminating activity. The degree of vertical tilt (° Y‐axis) was used to determine grazing position (readings >0° and <61°) and ruminating (readings >0° and <25.8°). Results showed a significant (P < 0.001) relationship of estimated grazing time against visual observations when acceleration (X‐axis) was used only; nonetheless acceleration (Z‐axis) was not significant (P > 0.05) for estimating ruminating time. When acceleration and tilt were used for estimating grazing (X‐ and Y‐axis) and ruminating (Z‐ and Y‐axis) time, the slope in both showed a significant (P ≤ 0.001) relationship. The prediction R2 in both activities indicated that acceleration (X‐ and Z‐axis) and tilt (Y‐axis) of HOBO loggers explained 0.961 and 0.945 of the variance in visual observations per cow/day. Therefore, the validation of the HOBO loggers was successful on a per cow/day and per day basis.
Experimental Agriculture | 2018
Carlos Galdino Martínez-García; Carlos Manuel Arriaga-Jordán; Peter Dorward; Tahir Rehman; Adolfo Armando Rayas-Amor
This paper seeks to make an exploratory investigation regarding farmers who have been using an innovation for a relatively long period (established users), compared to farmers who have only recently started (recent users). Therefore, the aims of this research were to identify (i) the extent to which intentions, attitudes and social pressure are similar or different between these two groups and (ii) whether comparison of the groups can improve academic understanding and provide insights into what is influencing the uptake of innovations. The study was conducted with 80 farmers who are already engaged with the use of improved grassland. In order to develop an understanding of the differences in drivers of the adoption of new technology, the sample was divided into established users and recent users of the innovation. To identify differences between groups regarding farmer and farm characteristics, 11 quantitative variables were analysed through a dependent t-test. The theory of reasoned action (TRA) was used as a theoretical framework and the Spearman rank-order correlation was used in data analyses. To identify differences in farmers’ perceptions of the components of the TRA, we used the Mann–Whitney U test. The results showed that established users had stronger intention to use improved grassland in the next 12 months, which would be attributed to activity based on milk production as a main source of family income. Advantages of improved grassland included lower animal feeding expenses; increases in quantity, quality and availability of fodder production and increases in milk production. We concluded that established and recent users’ intention to use improved grassland over the 12 months was influenced in different ways. Established users’ intention to adopt was strongly influenced by normative beliefs, i.e. social pressure from salient referents, where the father, uncle and veterinarian played the most important role, whereas recent users’ intention was mainly influenced by behavioural beliefs (positive and negative beliefs regarding the innovation) and the variables that describe the farm characteristics, i.e. the advantages and disadvantages that farmers perceive of the use of improved grassland on their farms, which were also considered as drivers of adoption.
Journal of Applied Animal Welfare Science | 2018
Genaro C. Miranda-de la Lama; Laura X. Estévez-Moreno; M. Villarroel; Adolfo Armando Rayas-Amor; G.A. María; Wilmer S. Sepúlveda
ABSTRACT The study aim was to identify consumer segmentation based on nonhuman animal welfare (AW) attitudes and their relationship with demographic features and willingness to pay (WTP) for welfare-friendly products (WFP) in Mexico. Personal interviews were conducted with 843 Mexican consumers who stated they purchased most of the animal products in their home. Respondents were selected using a quota sampling method with age, gender, education, and origin as quota control variables. The multivariate analysis suggested there were three clusters or consumer profiles labeled “skeptical,” “concerned,” and “ethical,” which helped explain the association between AW attitudes, some demographic variables, and WTP for WFP. This study is one of the first to address consumer profiling in Latin America, and the findings could have implications for the commercialization of WFP. Hence, customers should receive information to consider welfare innovations when deciding to purchase animal products. The growth of the WFP food market establishes an element of a far more multifaceted phenomenon of sustainable consumption and support of a new paradigm called responsible marketing in emerging markets such as Mexico.
Animal Production Science | 2018
J. Velarde-Guillén; Julieta Gertrudis Estrada-Flores; Adolfo Armando Rayas-Amor; F. Vicente; A. Martínez-Fernández; Darwin Heredia-Nava; M. D. Celis-Alvarez; I. K. Aguirre-Ugarte; E. Galindo-González; Carlos Manuel Arriaga-Jordán
Small-scale dairy systems (SSDS) in Mexico represent over 78% of dairy farms and 37% of milk production. In the central highlands, many SSDS base the feeding of herds on irrigated cultivated pastures (mostly cut-and-carry), straws, and large amounts of commercial concentrates that result in high feeding costs and low economic sustainability. Intensive grazing may result in lower feeding costs when compared with cut-and-carry strategies. The high protein content of pasture may meet requirements of dairy cows with moderate milk yield (16–20 kg milk/cow.day), so that lower protein supplements, like ground maize grain, may substitute for commercial concentrates. An on-farm experiment following a participatory rural research approach was undertaken with seven farmers evaluating commercial concentrate (CC) or ground maize grain (MG) as supplement; and two pasture managements, grazing (G) or cut-and-carry (C) of irrigated ryegrass/white clover pastures to assess productive performance and feeding costs. Six farmers participated with four milking cows each and one farmer with two groups of four milking cows in a 2 by 2 factorial experiment. Daily milk yield per cow before the experiment was used as covariate. The experiment lasted 12 weeks. There is a trend in G for higher protein content in milk (P 0.05) in comparison with the grazing strategy. Supplementing with home-grown ground maize grain resulted in 28.5% higher margins per kg of milk produced. Implementing grazing involves less work burden for small-scale dairy farmers, and combined with home-grown grains as supplement is a viable option that may reduce feeding costs in these systems.
Journal of Veterinary Behavior-clinical Applications and Research | 2018
Miguel A. Pulido; Marìa Antonia Mariezcurrena-Berasain; Wilmer S. Sepúlveda; Adolfo Armando Rayas-Amor; Abdelfattah Z.M. Salem; Genaro C. Miranda-de la Lama
Tropical Animal Health and Production | 2018
G.C. Miranda-de la Lama; M. Rodríguez-Palomares; Rosy G. Cruz-Monterrosa; Adolfo Armando Rayas-Amor; Rafael Silvio Bonilha Pinheiro; Francisco Galindo; M. Villarroel
Tropical Animal Health and Production | 2016
Carlos Galdino Martínez-García; Fergus L. Mould; Peter Dorward; Tahir Rehman; Adolfo Armando Rayas-Amor
Experimental Agriculture | 2016
Carlos Galdino Martínez-García; F. L. Mould; Peter Dorward; G.C. Miranda-de la Lama; Rosy G. Cruz-Monterrosa; Adolfo Armando Rayas-Amor
Collaboration
Dive into the Adolfo Armando Rayas-Amor's collaboration.
Carlos Galdino Martínez-García
Universidad Autónoma del Estado de México
View shared research outputsJulieta Gertrudis Estrada-Flores
Universidad Autónoma del Estado de México
View shared research outputs