J. Efrén Ramírez-Bribiesca

Colegio de Postgraduados - Mexico · efrenrb@colpos.mx

The Mixteca region of Oaxaca, Mexico, is characterized by extensive grazing of various grasses, shrubs, and trees to raise goats. The objective of this study was to identify and determine the dry matter (DM), organic matter (OM), crude protein, neutral detergent fiber (NDF), and in vitro dry matter digestibility (IVDMD) of the species consumed by g...

Four rumen-cannulated cows (Bos taurus × Bos indicus, 657 ± 92 kg body weight, BW) in a rotational grazing (Urochloa sp.) system were assigned to different canola oil (CO) inclusion levels, 0.0, 0.40, 0.80, and 1.2 g/kg according to shrunk body weight (SBW, BW adjusted for gastrointestinal filling) in a 4 × 4 Latin Square design to evaluate CO on t...

Selenium (Se) is an essential element and antioxidant that catalyzes the destruction of hydrogen peroxide formed during cellular oxidative metabolism. Doses of Se as selenomethionine (SeMe) by oral route are 0.1–0.3 mgSe/kg DM, while the dose by parenteral route with sodium selenite (Na2SeO3) is 0.1 mgSe/BW. The effects of supranutritional Se suppl...

En el trópico mexicano la ganadería está basada en sistemas de producción extensivos y es importante conocer el contenido nutricional de los forrajes, por ello el objetivo del presente estudio fue evaluar la composición química de: Cenchrus ciliaris L., Megathyrsus maximus cv Guinea, Ixophorus unisetus y Megathyrsus maximus cv Tanzania, gramíneas e...

Meat is an excellent medium for bacterial growth due to its high water and nutrient content. The nitrogenous compounds (NC) are derived through decarboxylation of amino acids due to microbial enzymes. The objective of this study was to evaluate the concentration of 3 NC and the proliferation of some microorganisms in rabbit meat with three treatmen...

Objective: To review the literature related to the use of husk and pulp of coffee in the feeding of ruminant andnon-ruminant animals.Approximation: The husk and pulp of coffee are by-products that remain after cleaning the bean. These area potential source of pollution; however, they can also be used for animal feed, reducing costs for the producer...

Ruminants, mainly cattle, contribute to greenhouse gases (GHG) emissions as methane (CH4) is produced by ruminal fermentation. Hence, various anti-methanogenic feed strategies have been studied, including the use of plants with secondary metabolites. This study evaluated in vitro ruminal fermentation metrics, microbial composition by digital drople...

The study aimed to investigate the effects of slaughter age and gender on carcase characteristics and meat quality of native Mexican turkeys raised under an extensive production system. Forty-five native turkeys (36 males and 9 females) were used. They were sacrificed at 24, 32, and 40 weeks of age. Slaughter age significantly affected slaughter we...

El pasto Urochloa híbrido cultivar Cobra es de reciente introducción al trópico mexicano y se desconoce la dinámica del ciclo de vida de los tallos, aspecto relacionado con la producción forrajera y la persistencia. El objetivo del presente estudio fue evaluar el comportamiento de este pasto a cuatro tiempos de corte. Se hipotetizó que realizar cor...

ranshumant pastoralism is a livelihood for many smallholders in the world. In Mexico, transhumant pastoralism has been practiced for 500 years and is classified as a system of transhumant goat pastoralism (TGP). The focus of the study was to identify and characterize the main goat herders of transhumance in the Mixteca-Baja of Mexico. The investiga...

This article aimed to analyze the biomethane production that is generated through the excreta of farm animals. Initially, a sequential structure was developed to distinguish the most relevant technical functions biodigesters have. Currently, there are several types of biodigesters in the world. Each one has advantages and disadvantages, but mainly...

This study was conducted to develop predictive equations for carcass characteristics and primal cut weights of native Mexican guajolotes using body measurements (BM). For this study, a total of 36 male guajolotes (Meleagris gallopavogallopavo), aged 6 to 10 months, and mean slaughter body weight (SBW) of 4543.14 ± 656.60 g, were used. The birds wer...

p> Background: The use of silages from non-conventional sources of nitrogen and soluble carbohydrates in feeding lambs is controversial in terms of nutrient supply; due to the minimum number of studies reported to date of in vitro evaluations that allow measuring its nutritional value in ruminants. Objective: To evaluate the additive effect and fer...

The objective of this study was to evaluate the inclusion of oregano essential oil (OEO) as a phytogenic feed additive in the diet of lambs on the productive performance, ruminal pH, ammoniacal nitrogen production, volatile fatty acids, nitrogen balance, carcass yield, backfat thickness, loin eye (Longissimus dorsi) area, shelf life, and antioxidan...

The objective was to implement a participatory process involving rescue and conservation of Creole goats in agro-silvopastoral systems, as a development strategy for the indigenous and marginalized region of the Mountains of Guerrero (MG), Mexico. The study focused on the caprine agroecosystem, documenting aspects of goat development and identifyin...

p> Background. Ruminants have been related to greenhouse gas production. Therefore, it has been necessary to find alternatives by using natural additives to reduce their production by modulation of rumen fermentation. Objective . It was to evaluate the effect of the addition of condensed tannins (CT) and different levels of essential oregano oil (...

The ovicidal and larvicidal effect of a full aqueous extract (FE) and two phases: an aqueous (Aq-Ph) and an ethyl acetate (EtOAc-Ph) from Ruta chalepensis (Rc) stems and leaves against Haemonchus contortus (Hc) were assessed. The egg hatching inhibition (EHI) assay and larval mortality (LM) test were performed by triplicate in 96-well micro-titrati...

Background. Ruminants have been related to greenhouse gas production. Therefore, it has been necessary to find alternatives by using natural additives to reduce their production by modulation of rumen fermentation. Objective. It was to evaluate the effect of the addition of condensed tannins (CT) and different levels of essential oregano oil (Lippi...

Four rumen-cannulated cows ( Bos taurus × Bos indicus , 631 ± 88 BW) were assigned in a 4×4 Latin Square design to test the effects of different canola oil inclusion levels (CO; 0.0, 0.40, 0.80 and 1.2 g/kg shrunk body weight, SBW = BW×0.96) on the reduction of CH 4 emissions and the energy value of the diet based on Brachiaria sp. under rotational...

The objective of this study was to evaluate in vitro rumen fermentation and methane pro-duction under the influence of two sources of phytochemicals: essential oils (EOs) and aqueous extracts (AEs). Treatments were set up in a completely randomized block design, with 4 × 2 + 1 factorial arrangement of four species, S (garlic, G; cinnamon, C; rosema...

El estudio evaluó la composición química, degradabilidad de la materia seca, producción de metano (CH4) y dióxido de carbono (CO2) en ensilados mixtos. Se realizaron micro silos de King grass CT-115 con la inclusión de 20, 30 y 40% de Clitoria ternatea adicionando de 5.0% de melaza y 0.5% de ácido fosfórico. Después de 40 días de fermentación, se d...

Por su importancia como cultivo estratégico de invierno parcialmente caracterizado, se estudió la composición química de avena forrajera variedad Chihuahua. En hoja, tallo, maleza, panícula y planta completa, se determinaron (g 100 g-1) fibra detergente neutro (FDN), fibra detergente ácido (FDA), lignina cruda (LC), cenizas (Cen), proteína cruda (P...

Zilpaterol and clenbuterol are two β-adrenergic agonist drugs used in animal production. Both drugs have anabolic effects with advantages on carcass yield. Meanwhile, zilpaterol is approved for animal feed in authorized countries. Clenbuterol is a banned substance due to the risk of toxicity; however, it is still being used in unknown dose levels i...

Objective: Lipid oxidation of meat is one of the most important factors affecting shelf life and is one of the decisive factors in the consumer's purchase decision of the product. Therefore, information related to lipid oxidation using rosemary (Salvia rosmarinus (L.) Schleid.) as a natural antioxidant is described and analyzed. Design/methodology/...

The objective was to evaluate the potential of methane (CH4) mitigation of high-tannin sorghum (HTS) varieties (V). The experiment was arranged as a completely randomized block design with a 7 × 2 factorial arrangement of treatments, including 6 HTS varieties (BRS72, Dekalb; 81G67, Dupont-Pioneer; QL-BR95, Lucava; 6001, ACA; NYX, Unisem; Red Bird,...

Los productores caprinos trashumantes (PCT) en la mixteca adquieren experiencias empíricas respecto al cuidado y pastoreo de sus animales, mismas que heredaron y modificaron a través del tiempo, estas experiencias se denominan etnoconocimientos. La trashumancia es considera como una estrategia de pastoreo y consiste en el movimiento cíclico del gan...

Dicalcium phosphate (DP) is a mineral involved in the metabolism and development and is used as a dietary source of phosphorus (PT) for poultry. Our study objective is to design nano-dicalcium phosphate (NDP) by co-precipitation. The methodological procedure was divided into two phases: (1) NDP synthesis, and (2) bird performance, digestibility, an...

he traditional knowledge of goat farmers in Oaxaca has been inherited from generation to generation for nearly 500 years. This study describes the traditional goat production with emphasis on its social, ecological, and genetic resources in the Mixteca (MX) and Central Valleys (VC) regions of Oaxaca. Ethnography was the method used to assessthe com...

This study discusses scientific findings on the use of draught animals such as equids (i.e., horses, mules, and donkeys) and bovids (i.e., cattle and water buffaloes) in rural labours. Relevant peer-reviewed literature published between 1980 and 2021 was retrieved from CAB Abstracts, PubMed, ISI Web of Knowledge, and Scopus databases. Although anim...

Zilpaterol and clenbuterol are two β-adrenergic agonist drugs used on animal production. Both drugs have anabolic effects with advantages on carcass yield. Meanwhile, zilpaterol is approved for animal feed in authorized countries; clenbuterol is a banned substance due to the risk of toxicity; however, it is still being used at unknown dose levels i...

Research regarding the association of fatty acids (FA) with corn stubble in feedlot lambs is limited. FA dietary supplements can reduce the digestibility of neutral detergent fibre (NDF). However, it is not known if the NDF amount added with corn stubble and FA source in the diet can influence the content of polyunsaturated fatty acids (PUFA) and t...

Feed additives, chemical inhibitors, and biological approaches have been studied and used to inhibit production of enteric methane (CH4) in ruminants by modifying methanogenic bacterial communities. However, information on the potential of micromineral supplements in this regard is limited. The objective of this study was to evaluate the effect of...

The immune response and phenotypic characteristics of Pelibuey lambs were analysed after the induction of a Haemonchus contortus trickle infection. Male lambs (n = 29; 20 kg live weight) were infected with 100 H. contortus infective larvae per kg of live weight on day 3, 5 and 7 of the experiment. The number of eggs per gram (epg), seven haematolog...

A grazing experiment was undertaken to assess the effects of two levels of herbage mass (HM) on herbage DM intake (DMI), fat and protein corrected milk yield (FPCM), grazing behaviour, energy expenditure (HP), and methane emissions (CH 4 ) of grazing dairy cows in spring. Treatments were a low HM (1447 kg DM/ha; LHM) or a high HM (1859 kg DM/ha; HH...

Ante-mortem studies of stress in rabbits are few and can potentially impact the haematologic response and physicochemical parameters of muscle meat. The aim of this study was to investigate the induction of stress by transport and simulation at two different times. Two hundred rabbits divided in a similar proportion of male and female were stressed...

In the present study, we evaluated the morphostructural variability of the Pastoreña goat (PG) in Mixteca region of Oaxaca, Mexico. This study was carried out to evaluate five qualitative ranges and thirteen morphometric characteristics of 249 animals (185 females and 64 males) from 2 to 5 years old. Descriptive statistics analysis was performed on...

Zilpaterol and Clenbuterol are β-adrenergic agonists that have been widely used to feed cattle. Although the use of Zilpaterol has been approved, Clenbuterol is still used illegally at unknown doses. However, the research of both substances has been based mainly on the evaluation of residues. To our knowledge, this is the first time that a cellular...

Total antioxidant capacity (TAC) and physicochemical characteristics of meat were evaluated after supplementing different doses of propolis in broiler chickens’ diets at: 15, 30, 45 and 0 mg propolis/kg feed for Pr15, Pr30, Pr45 and Pr0, respectively. Two hundred one-day-old chickens were fed for 42 d and sacrificed. Breast meat samples were used f...

This study discusses scientific findings on the use of draught animals such as equids (i.e., horses, mules, and donkeys) and bovids (i.e., cattle and water buffaloes) in rural labours. Relevant peer-reviewed literature published between 1980 and 2021 was retrieved from CAB Abstracts, PubMed, ISI Web of Knowledge, and Scopus databases. Although anim...

Evaluar el efecto de tres dosis de Zn suplementado en la dieta sobre la calidad y concentración de Zn en la carne. Diseño/metodología/aproximación: Se suplementaron 3 dosis de Zn: a) 21 mg Zn/Kg de materia seca (MS) proviene solo de la dieta, b) Zn80 (dieta (a)  ZnSO4) y c) Zn400 (dieta (a)  ZnSO4). Doce corderos de raza Katahdin distribuidos ale...

The objective of this study was to evaluate the reduction in nematode faecal egg count (FEC) in Pelibuey lambs segregated as resistant (RES), susceptible (SUS) and intermediate (INT) to gastrointestinal nematodes. Twenty-nine weaned Pelibuey lambs, aged five months old, free of nematode infection, were used. Nine lambs were RES, six were SUS and 14...

The present review aims to analyze the effect of extremely hot climates on the neurophysiological responses of thermal control and behavior in the river buffalo. Understanding thermal neuromodulation and its effects on the buffalo’s behavior is of central importance, for this will allow us to make better decisions in terms of improving the level of...

Objective: This review analyzes the scientific findings on the main handling and environmental factors that increase the incidence of dark cuts in the carcass of water buffalo and bovine of the Bos genus. Design/methodology/approach: Scientific articles were obtained from CAB Abstracts, Pubmed, Scopus and Google Scholar databases. The primary searc...

Trace minerals are essential nutrients for sustaining life, growth, and reproduction. In ruminants, mineral deficiencies affect the physiologic and metabolic functions that often trigger diseases. The design and use of controlled-release intraruminal boluses (CRIRB) are an alternative to correct the microelement deficiencies in the organism. This r...

Summer heat stress (HS) in warm climates decreases feedlot performance and, in extreme cases, causes death in fattening lambs. A traditional strategy to mitigate effects of HS has been the installation of galvanized sheet metal shades that partially or totally cover the corrals; however, the impact of total shading on thermoregulation and growth in...

The objective of the present study was to evaluate the effect of enriched-chromium yeast (YCr) on growth performance, carcass characteristics and longissimus muscle (LM) composition of finishing lambs. Fourteen Rambouillet ram lambs (23.3 ± 2.9 kg BW) were assigned to two treatments in a completely randomized design with 7 lambs per treatment: (i)...

Enterolobium cyclocarpum (Ec) is a native legume that grows from southern Mexico to South America; its seeds are traditionally used for feeding ruminants. The objective of this study was to evaluate the addition of Ec pods in diets of hair lambs and their effect on the productive variables, ruminal fermentation and in vitro production of methane (C...

One of the most important challenges facing today's society is feeding a growing world population. This review aims to examine the available information to assess the potential of river buffalo as a meat producer with a focus on the sustainability of the supply chain and on meat quality in terms of nutritional and sensory properties. Traditionally,...

The objective of this study was to compare two segregation methods to select resistant and susceptible female Pelibuey lambs infected naturally with gastrointestinal nematodes (GINs) in relation to their haematological and immunological response. For 6 months, faeces and blood samples were taken fortnightly from 40 grazing 5-month-old female lambs....

The aim of this study was to evaluate the effect of intraruminal boluses with sulfamethazine (SM) and selenium (Se) on goat kids naturally infected with Eimeria. Twenty goat kids were selected with an average body weight (BW) of 13.7 kg. They were grouped as follows (n = 5 animals per group). BC: dosed with boluses without drugs; BSM: dosed with bo...

Pectin is a polysaccharide present in food, its basic structure is an anhydro-D-galacturonic acid chain with α 1,4-bonds with methylated carboxyl groups (COOH) that allow the pectin to form a viscous gel and bind with the β-carotene in the intestine and decreases its absorption, consequently it could reduce the yellow color of the covering fat in t...

Objetivo: Realizar un mapeo de las deficiencias minerales más comunes que presenta el ganado bovino en las regiones tropicales de México. Diseño/metodología/aproximación: Se realizó la búsqueda en bases de datos científicas y académicas de publicaciones científicas sobre ganado bovino criado en el trópico. Resultados: Las zonas tropicales de México...