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Search Results: 1 - 10 of 405485 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%.
Aplicación de somatotropina recombinante porcina en lechones durante la primera semana de vida: efecto sobre variables metabólicas y somatométricas
Olmos-Hernández,A; Trujillo-Ortega,ME; Alonso-Spilsbury,M; Becerril-Herrera,M; Hernández-González,R; Mota-Rojas,D;
Archivos de medicina veterinaria , 2010, DOI: 10.4067/S0301-732X2010000200011
Abstract: 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 showed dramatic differences (p < 0,001) for glucose, lactate and weight gain for the males from g2 when compared to the females from the same experimental group on day 7 post-treatment. piglets treated with rpst showed significant differences in abdominal perimeter (28.67 ± 4.41 and 31.79 ± 3.74), dorsal length (28.42 ± 2.66 and 30.21 ± 4.70), and ham roundness (18.79 ± 2.62 and 22.38 ± 2.98). there is an ongoing research that will allow to determine the composition of body mass (bone or muscle) in the treated piglets.
Slaughtering Process, Carcass Yield and Cutting Process in California and Chinchilla Rabbit Breeds
D. Mota-Rojas,ADL.Reyes,M. Becerril-Herrera,S. Flores-Pintado,M. Alonso-Spilsbury,L.A.Cardona,C. Lemus-Flores
Journal of Food Technology , 2013,
Abstract: The objective of the present study was to evaluate the effects of sex and breed, on the slaughtering performance, carcass yield and cutting process in rabbits. Eighteen female and male rabbits of the Chinchilla and California breeds were used, animals were sacrificed according to the Official Mexican Norm. No significant differences between breeds and gender for all the variables were observed, except for ham roundness; California does showed the highest value, being significantly different from the males for both breeds. At 70 days, California rabbits showed a greater body development compared with the Chinchilla breed. Also, no significant differences were found between breeds for the primary cuts; although there was a numeric difference between Chinchilla and California rabbits regarding loin cut (291 vs. 273 g, respectively). The carcass yield obtained in this study was 58.51%, the greatest yield was observed in California does. Positive correlations were found between average daily gain and live weight (r= .89); skin weight and hot carcass weight (r=0.90), and live weight with both, skin weight (r= 90) and hot carcass weight (r=0.91).
Insensibilization of California Breed Rabbits and it’s Effect on Sanguineous pH, Temperature, Glucose Levels, Creatine Kinase and Slaughter Performance
M.Y. Guerrero,S.C. Flores-Peinado,M. Becerril-Herrera,A. Cardona-Leija,M. Alonso-Spilsbury,M.M. Zamora-Fonseca,J. Toca,R. Ramirez,J.A. Toca,D. Mota-Rojas
Journal of Animal and Veterinary Advances , 2012,
Abstract: The aim of this research was to study the effect of cervical dislocation and electric stunning of the California breed rabbit with a rest period before sacrifice (at 70 days of age) as well as the effect of same on sanguineous pH, temperature, glucose levels, creatine kinase, and slaughter performance. Forty male and female rabbits of the California breed were used. The sacrificed animals had either cervical dislocation or electrical stunning performed on them, then sacrificed according to normal regulatory practices. Our study is based on two insensibilization methods, cervical dislocation and electric stunning. The results show that plasmatic glucose and temperature before sacrifice and after insensibilization were not affected significantly (p>0.05) in the rest period or by sacrificial method. The pH of the animals that were given a rest period previous to sacrifice was significantly different from the animals that were not given rest; no significant difference between the insensibilization methods was found. We found a significant difference for bleeding times (p< 0.05) between cervical dislocation with rest compared to electrical stunning without rest. The rest period (p>0.05) did not significantly affect the volume of blood recovered during bleeding. However when comparing bleeding volume by insensibilization method significant statistical differences (p< 0.05) were observed. There were no significant difference in the variables of carcass evaluation; however, the lack of a rest before sacrifice affected pH values and temperature of the rabbit meat significantly.
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