
Daniel LópezAutonomous University of Tamaulipas | UAT · Faculty of Engineering and Sciences
Daniel López
Dr. en C.
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43
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Introduction
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October 2016 - February 2017
Publications
Publications (43)
Guanidinoacetic acid (GAA, Cas no. 352-97-6) is a feed additive that positively influences the energy and protein metabolism of animals, so it has the potential to improve the productivity of animals without affecting their health. The objective of the present study was to evaluate the influence of dietary supplementation with GAA on growth perform...
In Tamaulipas extensive goat production systems in the semi-arid region of the Altiplano contribute annually with the production of 41% of live animals and 87% of milk in the state. The objective of the study was to characterize the goat production units in the municipalities of Jaumave, Bustamante and Tula, in which a significant number of product...
Background: The honeybee (Apis mellifera L.) represents one of the most important species in the maintenance of ecosystems, since it contributes to crop pollination, which improves crop yields and the reproduction of other plants. However, some factors such as climate change, africanization and various pathological processes, including the presence...
The objective of this study was to evaluate the impact of the genotype on the chemical composition, feeding value and in vitro rumen degradability of fresh and ensiled forage of four native maize varieties (Amarillo, Olotillo, Tampiqueño and Tuxpeño) from Tamaulipas, Mexico, and a commercial hybrid, as well as the stability and aerobic deterioratio...
La automatización de sistemas inteligentes controlados remotamente para recolectar, analizar y procesar datos es una de las aplicaciones más comunes en diferentes campos de aplicación. Usualmente, para analizar la dieta del animal se requiere mucho tiempo y capital humano; los experimentos consisten en colocar al animal en una jaula para recolectar...
Guanidinoacetic acid (GAA) is a feed additive that promotes growth in animals, while maize (Zea mays L.) is used for the mitigation of ruminal greenhouse gases. However, it is unknown if GAA affects the efficiency of maize in mitigating gases or if there is synergy between them. Therefore, the objective of this study was to evaluate the in vitro pr...
The study ruminant digestive system is characterized by pre-gastric retention and fermentation. The vitro gas production techniques help predict the fermentation kinetics of food for ruminants. In this paper, an integral automatized system for monitoring the generated gas production by ruminal fermentation is presented. The system used a microcontr...
Among the Sustainable Development Goals approved by the UN is “2 zero hunger,” One of its targets is to increase investments in agricultural research and extension services and technological development to improve production capacity. Dry Matter Intake (DMI) is a fundamental parameter in animal nutrition research because it estimates the overall su...
Since the arrival of varroa (Varroa destructor) in Mexico, more than 33 % of the hives in the highland and northern regions of the country have been lost annually, due to the excessive use of synthetic acaricides, which have developed resistance in the populations of these mites. Due to this, the objective of this research was to evaluate the fall...
López-Aguirre, D., Hernαndez-Meléndez, J., Lucero-Magaña, F., López-Villalobos, N., Rojo, R. and Vαzquez-Armijo, J.F. 2021. Supplemental exogenous cellulases from Trichoderma longibrachiatum in growing lambs: In vitro rumen kinetics and productive parameters. Animal Nutrition and Feed Technology, 21: 303-313. Two experiments were carried out to inv...
The honey bee (Apis mellifera) has been the most widely used bee due to its pollination and honey production capacities. Currently, beekeeping encompasses several health problems, which have drastically affected the populations of beehives in production. Among the diseases affecting bees are: American foulbrood, European foulbrood, limebrood, stone...
The honey bee (Apis mellifera) has been the most widely used bee due to its pollination and honey production capacities. Currently, beekeeping encompasses several health problems, which have drastically affected the populations of beehives in production. Among the diseases affecting bees are: American foulbrood, European foulbrood, limebrood, stone...
Two experiments were conducted to evaluate the effect of different doses of Cinnamomum verum extract addition in a lamb diet on in vitro fermentation parameters and ruminal degradability. In the first experiment, the technique of in vitro gas production (PG) was carried out to a ration for lambs added with 0.0, 0.6, 1.2 and 1.8 mL g-1 of DM of C. v...
Background. An alternative in animal nutrition, to replace the use of synthetic additives, are essential oils, considered additives of vegetable origin. They are bioactive compounds, that have been shown to improve ruminal fermentation, nutrient digestibility, productivity and animal welfare. Objective. To review the current knowledge on the benefi...
p> Background. An alternative in animal nutrition, to replace the use of synthetic additives, are essential oils, considered additives of vegetable origin. They are bioactive compounds, that have been shown to improve ruminal fermentation, nutrient digestibility, productivity and animal welfare. Objective. To review the current knowledge on the ben...
El presente estudio tuvo como objetivo evaluar diferentes niveles de inclusión de forraje de Moringa oleifera L. en dietas para corderos en crecimiento sobre la cinética de fermentación ruminal y degradabilidad in vitro. Se utilizaron cinco tratamientos, los cuales fueron expresados en g kg-1 MS y consistieron en: control (IM0 = 0), nivel de inclus...
This study reports the nutrient composition of leaves of Moringa oleifera harvested at five different dates throughout the year. The leaves of M. oleifera were harvested from Güemez, Tamaulipas, Mexico during the rainy (3 dates) and dry season (2 dates) in 2016–2017. A proximate analysis was carried out on the processed samples using standard analy...
Tamaulipas destaca con dos regiones de producción caprina: al norte el valle de San Fernando y al suroeste el altiplano, en ésta última, la producción caprina se desarrolla con cruzas de razas bajo un sistema extensivo y el objetivo del presente trabajo fue identificar la estacionalidad de la producción de acuerdo a las características de las unida...
In livestock production systems in the tropics of Mexico, especially extensive systems, the use of native pastures as a basic diet prevails. However, in the dry season the quality and quantity of the grasses decreases, making the use of supplements with high nutritional value necessary, increasing feeding costs. The search for new sources of food f...
Pelibuey sheep is the main breed in the tropical and subtropical regions of Mexico, and high demand of sheep meat has favored the finishing of lambs in feedlots with diets containing high levels of grains. The objective of this study was to evaluate the effects of exogenous enzymes (EE) and application method on nutrient intake and digestibility an...
The objective of this study was to evaluate the effects of three fibrolytic enzyme products (cellulase (CEL), xylanase (XYL) and a 1:1 mixture of CEL and XYL (MIX)) at three dose levels (0, 1 and 3 lL/0.5 g DM) on the in vitro fermentation of a diet for growing lambs. Bottles were incubated for 96 h at 39 C. A mathematical model was used to estimat...
The aim of the present study was to evaluate the effect of Cu and Zn supplementation on growth, blood serum Cu and Zn levels, scrotal circumference and semen quality in growing male Boer × Nubian bucks. Twenty eight male goats were fed twice daily at 07:00 and 19:00 h with a total mixed ration (TMR) containing 10.3 and 22.5 mg/kg DM of Cu and Zn, r...
Twenty Pelibuey 3-4 month old and 23.7 +/- 3.3 kg body weight male lambs were used in a randomised design to study the effects of daily oral administration of Salix babylonica (SB) extract on dry matter (DM), water intake, average daily gain (ADG), and feed efficiency for 72 days. Animals were divided into four groups fed the same total mixed ratio...
Abstract Text: This study was conducted to evaluate the influence of an exogenous enzyme mixture on in vitro gas production (GP), in vitro dry matter degradability (DMD), metabolizable energy (ME) and short chain fatty acid (SCFA) production in growing lambs fed a high concentrate diet (219 g/kg CP), made with ground sorghum (550 g/kg), alfalfa hay...
This study was conducted to evaluate the influence of an exogenous enzyme mixture on in vitro gas production (GP), in vitro dry matter degradability (DMD), metabolizable energy (ME) and short chain fatty acid (SCFA) production in growing lambs fed a high concentrate diet. ZADO® (ENZ) is a powdered, commercially available multi-enzyme feed additive...
An in vitro gas production technique was used to evaluate the effects of copper and zinc supplementation on the amount and rate of gas production, dry matter degradability (IVDMD), utilization of metabolizable energy (ME), and ruminal fermentation patterns using rumen fluid from four Boer male goats as inoculum. The goats were fed twice daily at 07...
The reproduction of small ruminants like goats and sheep managed under extensive range grazing conditions can be affected by nutrients availability and especially by the mineral content of the forages resources on the rangeland. It has been particularly demonstrated that trace elements can have equally, beneficial or detrimental effects, depending...
Abstract: The aim of the present study was to evaluate the effect of Cu and Zn supplementation on growth and semen quality in male goats growing. Twenty male goats were fed. The animals received a balanced diet supplemented with Cu and Zn. There were no differences in initial body weight, final body weight, scrotal circumference, ejaculate volume,...
The effect of season (rainy: RS, and dry: DS) and reproductive status on copper (Cu) and zinc (Zn) concentrations in blood serum of crossbred goats (BW= 36.01 ± 1.59 kg) were studied under semiarid rangeland conditions in Southern Mexico State. Blood samples from 80 crossbred goats were taken each season (RS and DS). The goats were clustered into 1...
A factorial experimental design (3×2×3) was used to evaluate the effect of season of harvest and type of ruminal inoculums on in vitro ruminal fermentation kinetics and energy utilization of three browse tree foliages (Lysiloma acapulcencis, Quercus laeta and Pithecellobium dulce). Browse species were harvested during the dry season (DS) and rainy...
El objetivo del presente trabajo fue evaluar el efecto de la época (Lluvias: RS vs Secas: DS) y el estado reproductivo sobre la concentración de cobre (Cu) y zinc (Zn) en suero sanguíneo de cabras bajo condiciones de pastoreo extensivo en el sur del estado de México. Se utilizaron ciento sesenta cabras con un peso promedio de 36.01±1.59 kg. Con exc...