Miguel González-Lozano

• PhD
• Principal Investigator at National Autonomous University of Mexico

The aim of this study was to determine the potential fertilizing of spermatozoa from the epididymal tail in different periods of time post-orchiectomy (P-OQ). Therefore, the study was approached in two stages. In the first stage, the orchiectomy was performed in 30 adult pigs. The testicles were stored at 5.00 ˚C in physiological saline solution fo...

ABSTRACT Purpose: The reproductive problems at parturition in buffaloes are highly important. The literature describes a high incidence of dystocia in buffalo herds as a cause of significant mortality in neonates. Therefore, understanding the physiology, behavior, and signals of calving in buffalo dams during eutocic and dystocic births will allow...

Labour challenges the newborn to adapt to extrauterine life and survive the troublesome neonatal period. Low vitality is a recurrent problem in veterinary perinatology, and several factors can directly or indirectly culminate in neonatal death. One prime determinant of low vitality in animals is foetal hypoxia resulting from prolonged labour or dys...

The facial expressions of animals constitute a means of manifesting emotions, fulfilling functions related to social interactions in several species. Interest has come to use facial expressions as a tool for predicting intentions; in the case of aggression, for example, impeding attacks between individuals prevents negative economic and emotional i...

Tail docking has been practiced on dogs for many years for various reasons, including aesthetics, breeding standards and hygiene, to facilitate reproductive handling in some dog breeds, breeders' decisions and tradition, or to prevent lesions during play or work, to name a few. Little research, however, has been done to demonstrate whether this pra...

La extracción sanguínea en los lechones neonatos es necesaria para la evaluación fisiometabólica y para determinar alteraciones gaseosas útiles en el diagnóstico de varios fenómenos como la asfixia intraparto; siendo la causa principal no infecciosa que origina una alta tasa de mortalidad neonatal en cerdos. Nuestro objetivo fue evaluar tres de los...

Dystocia frequently develops when some physical obstacle or functional defect impedes the birth process. Due to the complex nature of the factors involved in the process of parturition, it may be difficult to distinguish between eutocia (normal delivery) and dystocia (difficult birth). It is essential to do so because the physiopathological effects...

Mortality in piglets during the perinatal period, especially the first days after birth, is frequently caused by noninfectious conditions, such as hypoglucemia or low birth weight, which can be associated with hypothermia experienced at birth. The thermal stability of newborn piglets is a fundamental aspect of neonatal care, so maintaining a consta...

Intra-partum asphyxia is the most common non-infectious etiology limiting the performance of neonate piglets. Previous studies indicate caffeine (orally and subcutaneously) reverses the effects of intra-partum asphyxia in neonate piglets. In this study, there was investigation of whether use of a novel therapeutic protocol for administering caffein...

The aim of this research consisted in assessing the effect of various kinds of environmental enrichment (EE) on the physiological responses of weaned piglets. The mean age of the 96 piglets that participated was 27 days. The piglets were weaned and then housed under two conditions: with no disruption of the social order (SO), and with disruption of...

The aim of this review is to assess the different treatments and therapeutic protocols used for neonatal asphyxia in animal production. Perinatal asphyxia is considered to be one of the main non-infectious causes of neonatal mortality in the majority of domestic mammals. However, its incidence in intensive animal production is increasing because of...

Labour challenges the newborn to adapt to extrauterine life and survive the troublesome neonatal period. Low vitality is a recurrent problem in veterinary perinatology, and several factors can directly or indirectly culminate in neonatal death. One prime determinant of low vitality in animals is foetal hypoxia resulting from prolonged labour or dys...

The objective of this study was to evaluate through the infrared thermography the surface temperature of the lacrimal caruncle (ocular), auricular pavilion and nose area of weaned piglets in relation to different types of environmental enrichment (EE). A total of 64 weaned piglets were monitored. The piglets were housed under two distinct condition...

The objective of this study was to determine the effect of local anesthesia and the number of incisions performed on the physiological blood profile of piglets after surgical castration. A total of 60 male piglets were divided into five groups of 12 each, based on the surgical method employed and the use, or not, of local anesthesia, as follows: su...

Consulta el artículo completo en la revista electrónica GANADERIA.COM. https://www.ganaderia.com/destacado/El-bienestar-de-la-b%C3%BAfala-lechera-al-parto

The objective of the study was to evaluate infrared temperature and metabolic responses in different-aged piglets castrated surgically with one or two incisions. The piglets were divided into groups according to age (5-and 13-day old) and the number of incisions: simulated castration; castration with one incision (C1I5 and C1I13); and castration vi...

The objective of this study was to evaluate the effect of birth order on the physiological and metabolic responses of the newborn piglet the first hours after birth. A total of 281 randomly selected newborn piglets were included, classified according to birth order in 12 groups (L1-L12). The expulsion interval, neonatal vitality, latency in connect...

The horse welfare at markets includes fatigue, fear, fasting, dehydration and injuries. However, the scientific literature contains no readily-available information on the physiology responses of equids sold in livestock markets. The objective of the present study was to evaluate the effect of holding in livestock markets on gas exchange, the acid-...

Purpose The reproductive problems at parturition in buffaloes are highly important. The literature describes a high incidence of dystocia in buffalo herds as a cause of significant mortality in neonates. Therefore, understanding the physiology, behavior, and signals of calving in buffalo dams during eutocic and dystocic births will allow the develo...

Generalmente es aceptado que el parto en sí mismo es un proceso doloroso y de riesgo tanto para la madre como para los nacidos. La lesión, trauma e inflamación asociadas con el parto (particularmente en distocia) pueden tener efectos negativos importantes en la salud, bienestar y productividad en las especies de producción (Mellor y Stafford, 2004;...

The main objective of the present study was to evaluate the physiometabolic blood responses of broilers during arrival, post-lairage and exsanguinations. Post-handling in each period ante-mortem was blood sampled to determine metabolic changes, acid-base balance, and blood gas exchange: pH, hematocrit (%), glucose (mg/dL), electrolytes [Na⁺, K⁺ and...

Profesor Investigador de la Benemérita Universidad Autónoma de Puebla (BUAP) y un gran ser humano. Pionero en valoración del bienestar animal a través de perfiles fisiometabólicos. Su tesis Doctoral aporta bases científicas para reducir el estrés ante-mortem del cerdo, sus 3 libros en ciencia de la carne y sus más de 40 artículos científicos en más...

This study evaluated the physiological responses of piglets weaned at three different ages and transported immediately over unpaved roads with and without the use of straw bedding in the transport vehicle. The study included 270 hybrid piglets born of York–Landrace dams and Pietrain sires. The piglets were weaned and then transported at 8 days old...

The objective of this study was to evaluate uterine activity at farrowing in sows with different gestation lengths (GL), and its effect on the metabolic profile, blood gases and daily weight gain of neonate piglets. The experiment covered a period of 25 weeks and involved 200 Yorkshire-Landrace sows. The animals were assigned to four groups of 50 s...

Prologo Segunda Edición por Dra. Carmen Gallo Existe una creciente preocupación en el mundo por el bienestar de los animales en general y en particular de los de granja, que nos proporcionan alimentos. Los consumidores perciben un problema en el trato de los animales y requieren cada vez más antecedentes sobre lo que se entiende como calidad ética...

La duración y grado de asfixia perinatal en el humano influye en la morbilidad fetal y neonatal así como su mortalidad (James et al., 1958). Nelson et al. (1996); (citados por Brouillette y Waxman, 1997), reportan que 10 a 20% de los casos de parálisis cerebral en niños, son consecuencia de la asfixia perinatal. La hipoxia, hipercarbia (acidosis re...

The objective was to measure the effects of VC (a uterotonic drug with vasodilator effects) in eutocic and dystocic sows, on the acid-base balance and some vitality traits of piglets at birth. Farrowing was induced with prostaglandin F2α. Four groups of sows (20 sows/group) were monitored; Groups 1 and 2 were eutocic sows, whereas Groups 3 and 4 we...

This study was undertaken with the goal of assessing the responses to stress in ducks slaughtered by two different methods on the basis of measuring the critical blood variables of 90 White Peking ducks (Anas platyrhynchos) with a mean weight of 2200 +/- 30 g. Reference values were established by taking samples from 30 ducks at rest; another 30 bir...

The incidence of poor quality meat associated with acute ante mortem stress is a condition that severely affects the pork production chain, so preventing it must become a priority in the pork industry. The aim of this review was to assess the most relevant ante mortem stressors that affect pork quality. Stress-related factors during production, tra...

The objective of this study was to evaluate the effect of stunning method on critical blood variables and their repercussions in four experimental groups on the physical-chemical characteristics of guinea pig meat (Cavia porcellus). Eighty Dunkin-Hartley guinea pigs distributed in four experimental groups were used. Those in groups 1 and 2 (G1 y G2...

Introduction Well-being and transport Loading and space allowance Animal well-being and stress in broiler transportation Broiler chickens dead on arrival at the slaughterhouse Requirements during transport Effects of transport on meat quality Conclusions References

Introduction Building requirements Facility requirements Personnel care and hygiene Conclusions References References

The aims of the study were to characterize the uterine activity in sows treated with vetrabutin chlorhydrate (VC), an uterotonic and muscle-tropic drug during farrowing, and to measure the effects of the drug on piglet neonatal viability. The experiment involved 1478 piglets from 130 Yorkshire-Landrace sows, randomly allotted into two groups. Farro...

Sixty hybrid Yorkshire-Landrace penned sows, 30 with eutocic farrowing and 30 experiencing a dystocic parturition, were studied to evaluate the obstetric and neonatal outcomes to low doses of oxytocin administered at advanced stages of parturition. Animals in each group were randomly subdivided into 2 subgroups: 15 eutocic and 15 dystocic sows rece...

The objective of this study was to establish a range of reference values for blood gas analysis, electrolytes, hematocrit and critical blood variables for guinea pigs anaesthetized with xylazine-ketamine. The influence of the strain (short hair English vs. Duncan-Hartley) was also evaluated. Blood was obtained by cardiocentesis from 40 clinically h...

Current globalization policies demand animal welfare standards on animal transportation. In spite of international tendencies to commercialize meat cuts while decreasing live animal transit, transport is still one of the major problems in terms of animal welfare, besides carcass and meat by–products' quality. The present review analyzes, in general...

The aim of the study was to monitor the sow maternal response to a low oxitocin dose in an advanced parturition stage in eutocic and maternal–foetal dystocia. Sixty York x Landrace sows, 30 with eutocic farrowing and 30 with maternal–foetal dystocia were assigned into two different groups: 15 received 0.083 IU/kg of oxytocin after the expulsion of...

The aim of the study was to monitor the sow maternal response to a low oxitocin dose in an advanced parturition stage in eutocic and maternal-foetal dystocia. Sixty York × Landrace sows, 30 with eutocic farrowing and 30 with maternal-foetal dystocia were assigned into two different groups: 15 received 0.083 IU/kg of oxytocin after the expulsion of...

Current globalization policies demand animal welfare standards on animal transportation. In spite of international tendencies to commercialize meat cuts while decreasing live animal transit, transport is still one of the major problems in terms of animal welfare, besides carcass and meat by-products' quality. The present review analyzes, in general...

Current globalization policies demand animal welfare standards on animal transportation. In spite of international tendencies to commercialize meat cuts while decreasing live animal transit, transport is still one of the major problems in terms of animal welfare, besides carcass and meat by-productsquality. The present review analyzes, in general t...

The aim of the study was to monitor the sow maternal response to a low oxitocin dose in an advanced parturition stage in eutocic and maternal-foetal dystocia. Sixty York × Landrace sows, 30 with eutocic farrowing and 30 with maternal-foetal dystocia were assigned into two different groups: 15 received 0.083 IU/kg of oxytocin after the expulsion of...

La hipoxia, hipercarbia y acidosis metabólica, secundarios al metabolismo anaeróbico son características esenciales de la asfixia. La evaluación de dichos parámetros a partir de sangre arterial de cordón umbilical al nacimiento, tanto en recién nacidos humanos como en animales, ha permitido evaluar la gravedad de la asfixia perinatal, y ha sido cor...

Currently, poultry plants are sacrificing between 140 to 180 broilers per minute; sometimes animals are not sacrificed properly, which makes manual sacrifice necessary. In the present study a review is provided on the most relevant aspects regarding different methods used for chicken sacrifice, these methods are analyzed and a comparison with Mexic...

The objective of this study, was to evaluate the effect of two stunning methods on blood gasometry, metabolic profile, acid-base balance and carcass quality on broilers. Sixty broilers were monitored. Before sacrifice, the birds were weighed and randomly divided by sacrifice method into 2 groups: decapitation (30) and electric stunning (30). Bleedi...

The objectives of the present study were to evaluate the effects of increasing space in transportation at different distances, on live weight loss in pigs and to determine the effects of fasting and pre-slaughter lairage period on both live and carcass weights by sex and on pork quality. Seven hundred and twenty pigs Pietrain x (YorkshirexLandrace)...

The objective of the present study was to compare various doses of intramuscular administration of oxytocin and its effects on the dynamics of the uterus and level of neonatal asphyxia in periparturient Yorkshire-Landrace sows. Two hundred females were randomly assigned to 4 groups of 50 for each treatment. They were given oxytocin in 3 different d...

In order to evaluate how spontaneously born piglets could be a suitable model for the study of intrapartum hypoxia, 230 newborn piglets were studied. Out them, 8.3% (n = 19) died intrapartum, 21.7% (n = 50) were born with moderate-to-severe intrapartum hypoxia, and 70% (n = 161) were born with mild or no evidence of intrapartum distress. Piglets bo...

Seven hundred and fourteen pigs were monitored from transport to slaughter in July in three treatments: 8, 16 and 24 transport hours; lairage time for the three groups was of 8h. Transport duration significantly (P<0.05) affected live-weight gain during the rest period. Weight gain percentages at lairage were 0.05%, 0.78% and 1.15% for treatments 1...

Prenatal development is mainly dependent on a close interrelation between nutritional supply use and regulation by hormones and growth factors. Mechanisms during early embryonic development are sensitive to manipulation through selected management strategies of the sow and modifications of this strategy may serve as a model for the examination of m...

Artisan pig family farms are an important mean of income, in spite of their poor performance they represent a small capital fund that can be used when faced with urgent cash flow situations, or to face immediate family feeding needs. Boar service rental in urban and rural areas is still common, this consists of renting boars for breeding in exchang...