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Search Results: 1 - 10 of 405526 matches for " M. Becerril Herrera "
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Effects of Additional Space During Transport on Pre-slaughter Traits of Pigs
M. Becerril-Herrera,D. Mota-Rojas,I. Guerrero-Legarreta,M. Gonzalez-Lozano
Journal of Biological Sciences , 2007,
Abstract: 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) were divided into two experimental conditions (EC1 and EC2). EC1 pigs were divided in three groups of 120 animals each and were transported for 8, 16 and 24 h (loading density: 0.35 m2/100 kg). EC2 pigs were divided in three groups of 120 animals, the transport duration was the same as in EC1 (loading density: 0.68 m2/100 kg). Transport duration and space allowance significantly affected (p< 0.01) the posture of the pigs on arrival to the slaughterhouse; there were significant differences (p< 0.01) between genders. When transport time was shorter, a higher number of pigs arrived in a standing posture, more females arrived in a standing position in the group shipped for 8 h. Pig position affected carcass yield, when transportation time was shorter carcass yield was higher. There was a higher percentage (p< 0.01) of pigs at pH 5.8-6.2 in animals transported for 8 h, compared with 16 and 24 h period, independently of the space allowance. Additional space provided to pigs during transportation lead to a better animal welfare in transit and had no decisive influence in the quality of the carcass; nevertheless, the quality of meat improved.
Equine Carcasses: Nutritional Analysis, Shrinkage and Cutting Performance
M. Becerril-Herrera,M. Zermeno,D. Mota-Rojas,G.H. Gonzalez
Journal of Biological Sciences , 2006,
Abstract: Ten equine carcasses from creole horses were used, distributed by sex: 5 females and 5 males. Animals were identified with a mark in their posterior limbs using indelible ink in order to follow the carcass up to the butchery. Each cut was weighed in order to characterize the shrinkage percentage and carcass yield. Samples of the Longissimus dorsi muscle at the level of the tenth rib were taken at the butchery in order to carry out a proximal chemical analysis. The average percentage of protein was 18.6, which turned out to be 7.5% lower than the one reported by others authors. In adult animals gaskins, shoulder blades, ribs and flanks (spare meat for fillets) corresponded to 30.0, 21.3, 31.2 and 16.5%, respectively, of the total carcass. In young animals gaskins represented 29.5%, shoulder blades 19.6%, ribs 31.3% and flanks, 12.5% of the total carcass. We conclude that horse meat can be an excellent alternative for consumption for its high content in proteins and low levels of fat. It is also worth mentioning the higher losses for shrinkage due to the high content of humidity as well as the characterization of the yield at cutting.
Feeding Kitchen Leftovers to Fattening Pigs Effects on Health and Production Performance
D. Mota-Rojas,M. R. Becerril-Herrera,H. J. Herrera,C. Noriega,M. Alonso-Spilsbury
Journal of Food Technology , 2013,
Abstract: The use of kitchen leftovers as a feeding source in pigs has quality limitations as well as health and sanitary restrictions; nevertheless, it is still the only affordable food for some artisan pig farms. Production performance in hybrid pigs at an artisan farm in the State of Mexico, was studied. Four treatments (T1-T4) were administered to 50 hybrid pigs distributed at random as follows: T1 had 15 sows and T2, 15 castrated male pigs, both groups were fed with kitchen leftovers; T3 had 10 sows and T4, 10 castrated male pigs; these latter groups were fed with a commercial balanced feed. In order to analyse the differences between the means of the treatments a Tukey test was used. Proximal analysis showed the low nutritional quality of the leftovers. Animals fed with kitchen waste showed a higher percentage of respiratory and enteric signs that affected the muscular tissue development. Furthermore, leftovers increased feed conversion compared to the balanced diet. Treating the kitchen waste is recommended in order to diminish the pathogen incidence, and adding protein to the diet which will guarantee the fulfillment of animal nutritional needs. It is true that feeding with leftovers is cheap but it is convenient to take into account the cost involved which includes growth delay and both respiratory and digestive problems in animals.
Apparent Digestibility and Growth in Two Swine Genotypes Kept under Pasturing and Confinement Conditions
M. Becerril-Herrera,C. Lemus-Flores,H.J.G. Herrera,M.Alonso-Spilsbury
Pakistan Journal of Biological Sciences , 2006,
Abstract: The study was carried out with 13 Mexican Hairless (MHP) and 21 York-Landrace (Y-L) fattened pigs, randomly distributed in 4 treatments: 1) MHP under total confinement, 2) MHP in pasturing conditions, 3) Y-L in total confinement and 4) Y-L in pasturing conditions, all four groups were fed ad libitum. Morph metric growth in 63 days old pigs showed significant differences (p<0.0001) between breeds; however, at the end of the study (175 days old) significant differences were observed (p<0.05), both between breeds and between productive systems for the following variables: height at withers, hind- and fore- cane perimeters and snout length; indicating that the feeding system caused some hypertrophies in the organs mostly exercised. Results on the percentage of ileal apparent digestibility showed significant differences (p<0.001) between breeds and between productive systems too, whereas in the total apparent digestibility, differences between feeding-productive systems were only significant in the MHP. Results indicate that the MHP is a small size animal with thin limbs, these pigs show a great instinct for forage consumption but are unable to take advantage of this since they can not digest fiber, which ends with the myth that swine autochthonous breeds are able to digest fiber.
Aplicación de somatotropina recombinante porcina en lechones durante la primera semana de vida: efecto sobre variables metabólicas y somatométricas Porcine recombinant somatotropin administered to piglets during the first week of life: effects on metabolic and somatometric variables
A Olmos-Hernández,ME Trujillo-Ortega,M Alonso-Spilsbury,M Becerril-Herrera
Archivos de medicina veterinaria , 2010,
Abstract: Con el fin de evaluar el efecto de la administración de la somatotropina recombinante porcina (rpST) en lechones, sobre las variables metabólicas y somatométricas durante la primera semana de vida, se evaluaron un total de 220 lechones al nacimiento de 40 cerdas híbridas Landrace x Large White. Los lechones fueron clasificados aleatoriamente en dos grupos. El Grupo 1 conformado por 106 lechones (Grupo testigo) y el grupo 2 por un total de 114 lechones (Grupo tratado con pST). La administración de la rpST se realizó a una dosis de 1 mg/kg cada 24 h durante siete días. En el pH al nacimiento se apreciaron diferencias significativas (P < 0,05) en ambos grupos (7,42 ± 0,47 y 7,31 ± 0,59), fenómeno que desaparece a la semana de vida. A la semana se observó un aumento significativo (P < 0,001) en los niveles de glucosa en los lechones del G2 vs. G1 (103,71 ± 18,4468, 78 ± 10,44). Al final del experimento la ganancia diaria de peso fue mayor para el grupo tratado con rpST (209,21 ± 45,97) respecto al grupo testigo (137,25 ± 31,31). Al comparar el efecto del tratamiento por sexo se observaron marcadas diferencias significativas (P < 0,001) en el pH, glucosa, lactato y peso ganado en los machos del G2 con respecto a las hembras del mismo grupo a los siete días postratamiento. Los lechones tratados con rpST presentaron diferencias significativas en las variables: perímetro abdominal (28,67 ± 4,41 y 31,79 ± 3,74 respectivamente), largo dorsal (28,42 ± 2,66 y 30,21 ± 4,70 respectivamente) y redondez del jamón (18,79 ± 2,62 y 22,38 ± 2,98 respectivamente). Investigación en proceso permitirá distinguir la masa corporal ganada por los lechones, en ósea o muscular. The aim of this study was to evaluate the effect of porcine recombinant somatotropin (rpST) administered to piglets during their first week of life, on metabolic and somatometric variables. A total of 220 piglets born from 40 hybrid Landrace x Large White sows were used. Piglets were randomly assigned to either Group 1 (G1, Control, n = 106) or Group 2 (G2, rpST treatment, n = 114). The rpST dose was 1mg/kg every 24h during 7 consecutive days. Serum pH at birth showed significant differences between groups (7.42 ± 0.47 and 7.31 ± 0.59), although this difference dissapeared on day 8. There was a significant increase (P < 0,001) in plasma glucose levels for the treated group on day 8 (68.78 ± 10.44 and 103.71 ± 18.44). Average daily weight gain was also higher for the somatotropin treated group compared to the control (137.25 ± 31.31 and 209.21 ± 45.97). Comparisons for interaction between treatment and sex sh
Morphometry, Carcass Yield and Traits of Mexican Creole Goat Kids Slaughtered and Packed in a Federal Inspection Plant
M. Becerril-Herrera,O. Guzman-Pina,M. Alonso-Spilsbury,E.V. Dorsey-San Vicente
Journal of Biological Sciences , 2006,
Abstract: The objective of the present study was to evaluate the morphometry and carcass traits of Creole goats sacrificed and packed in a Federal Inspection Plant (FIP). The study was carried out in a FIP abattoir during May and June 2004. Fifty Creole male goats, 40 to 50 days old were used, brought form nearby family farms. Goats were transported without stops and they were not fed, nor provided with water. Carcasses were graded and 11 indicators were measured: both hot and cold carcass yields, cold carcass temperature, viscera weight, morphometry and pH, among others. When comparing the hot carcass weight with and without viscera (5.03 vs. 4.55), the values measured indicated that viscera represented 20.22% of the animals weight. The difference observed between hot carcass and cold carcass weight was 4.55 vs. 4.28 kg, respectively. Positive correlations were determined (R = 0.96) between hind-limbs (R = 0.65) and forelimbs (R = 0.69), as well as the one registered of both limbs with the hind and fore canes` perimeters. On the other hand, the abdominal and thoracic regions were highly correlated (R = 0.9). This is an indicator of the animal biotype, which shows that these animals are long linear with highly developed limbs. The pH mean of the hot carcass and the cold carcass was 6.06 and 5.97, respectively.
Diagnosis of Microbiological Contamination Risks in Frankfurt Type Sausage, Virginia Ham and Dried Salted Pork
M.G. Nunez-Gutierrez,J.M. Tapia-Gonzalez,M. Becerril-Herrera,R. Ramirez-Necoechea,M. Alonso-Spilsbury,D. Mota-Rojas
Journal of Food Technology , 2013,
Abstract: The objective of this study was to diagnose the risks of microbiological contamination in 3 meet products: Frankfurt type sausage, Virginia ham and dried salted pork, made in the meat processing plant at the University of Guadalajara. The influence from the physical infrastructure of the plant was evaluated such as the type and number of handlers, number of people present when the handling was carried out, as well as the time of manipulation and storage in refrigeration, the environmental conditions in processing areas and refrigeration and water from the municipal source (used to wash hands), equipment and utensils. Meat products with various preparation processes were chosen, individual microbiological tests for Salmonella, Escherichia coli and Staphylococcus aureus were made. The 90 point sanitary questionnaire was used to verify sanitation for physical risks in the processing plant. The results were analyzed using the EpiInfo 2002 data base. There was a significant effect (p< 0.05) between independent variables, number of people coming in per day, and time of refrigeration with S. aureus present in the sampled food. Using standard comparison we observed that 100% of the products had some kind of microorganism. The installations complied entirely with the 90 point questionnaire by 23.08%, partially by 42.31% and was incompliant by 34.62%.
Effects of Pre-Slaughter Transport, Lairage and Sex on Pig Chemical Serologic Profiles
D. Mota-Rojas,M. Becerril Herrera,M.E. Trujillo-Ortega,M. Alonso-Spilsbury,S.C. Flores-Peinado,I. Guerrero-Legarreta
Journal of Animal and Veterinary Advances , 2012,
Abstract: The aim of this research was to study the effects of pre-slaughter transport and lairage on the chemical serologic profile of swine, as well as its relationship with qualitative aspects of meat: pH, color and temperature. Forty eight Pietrain x Landrace pigs were monitored (24 females and 24 barrows). They were transported on straw bedding trucks without stops during 2 h and deprived of feed and water. Blood samples were taken before loading, at arrival to the slaughterhouse, after lairage and during bleeding (20 sec after they were electrically stunned). At arrival to the slaughterhouse pigs were randomly distributed in 4 groups: Rested (n = 24) non-rested (n = 24) these groups were also divided by sex. Blood samples were taken form groups 1 and 2 and the animals sent directly to the slaughter pens, whereas groups 3 and 4, after blood sampling, were taken to lairage pens. Glucose and Creatine Kinase (CK) showed a high increase in blood concentration, associated to an increase in muscular activity and a decrease in globulins concentration as a consequence of stress and immunosuppression. Hyperglycemia and lactic acidosis detected in animals without rest were statistically different (p<0.05) compared to the group that rested. Bicarbonate level significantly decreased (p<0.05) in non-rested animals as compared to rested animals. Results indicated that animals without rest before slaughter can show hemodynamic and metabolic alterations that lead to hyperglycemia, lactic acidosis and an abrupt descent of pH, altering the carcass color.
Studies on Growth of Pelon Mexicano Pigs: Effect of Rearing Conditions on Performance Traits
M. Becerril,C. Lemus,J.G. Herrera,M. Huerta,M. Alonso-Spilsbury,R. Ramirez-Necoechea,D. Mota-Rojas,J. Ly
Journal of Animal and Veterinary Advances , 2012,
Abstract: A 2x2 factorial arrangement was used for evaluating performance traits during 16 weeks in 2 groups of 22 Yorkshire x Landrace (YL) and 13 Pelón Mexicano (PM) castrate male and female pigs 63 days old which were allotted at random into 2 rearing systems consisting of total (15 and 7 pigs) or partial confinement (7 and 6 pigs). Partial confinement included rearing animals outdoors in a grass prairie (Brachiaria brizantha) from 9:00-16:00 h. No significant differences (p<0.05) for the interaction rearing system x genotype were found in any measured performance trait. It was observed that treatments involving Yorkshire x Landrace animals had a high significant (p<0.001) live weight at any age, as compared to the PM pigs. It was evident that YL pigs had a higher daily feed intake than PM animals and on the other hand, results from animals in confinement clearly indicated that feed intake in those pigs was higher than in the others, permitted to graze during 8 h every day. Calculated daily gain was 820 and 757 g in YL pigs when reared in total confinement or partially outdoors, whereas this same trait was 414 and 335 g in PM pigs. When a comparison was made between improved and local pigs reared in total confinement, feed conversion was on average, 3.07 kg kg-1 in the YL animals and 5.03 kg kg-1 in the PM pigs.
Studies on Growth of Pelon Mexicano Pigs: Effect of Rearing Conditions on Carcass Traits and Meat Quality
M. Becerril,C. Lemus,J.G. Herrera,M. Huerta,M. Alonso-Spilsbury,R. Ramirez-Necoechea,D. Mota-Rojas,J. Ly
Journal of Animal and Veterinary Advances , 2012,
Abstract: A 2x2 factorial arrangement was used for evaluating carcass traits and meat quality of 22 Yorkshire x Landrace (YL) and 13 Pelón Mexicano (PM) castrate male and female pigs 63 days old which were allotted at random during 16 weeks into 2 rearing systems consisting of total (15 and 7 pigs) or partial confinement (7 and 6 pigs). Partial confinement included rearing animals outdoors in a grass prairie (Brachiaria brizantha) from 9-16 h. There were no significant differences (p<0.05) for the interaction rearing system x genotype in any measurement conducted throughout this experiment. Highly significant (p<0.001) differences between genotypes was encountered for carcass yield and primary cuts adjusted to slaughter weight as covariable. However, carcass yield expressed as percentage of slaughter weight only tended (p<0.103) to favour YL pigs. Differences between rearing systems were less marked, with better carcass traits in either totally confined YL animals or partially confined PM pigs. The genotype effect was at least significantly (p<0.01) different in all measurements indicating a higher fat content in carcasses of PM pigs, when compared to YL animals. Length of some reservoir digestive organs were significantly (p<0.001) higher in PM than in YL pigs. There were no significant differences (p>0.05) in meat quality indices, including meat pH, water holding capacity, color and marbling. It is considered that a total or partial confinement, consisting on daily grazing outdoors, rearing system, has less influence on carcass traits in pigs when Pelón Mexicano and Yorkshire x Landrace pigs are compared.
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