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Articles by C. Lemus-Flores
Total Records ( 6 ) for C. Lemus-Flores
  K. Mejia-Martinez , C. Lemus-Flores , J.F. Zambrano-Zaragoza , R. Ramirez-Necoechea , D. Mota-Rojas and M. Alonso-Spilsbury
  The aim of the study was to measure the cytokine immune response in 2 Mexican creole biotypes and compare it to commercial pigs (COM) as disease resistance indicators. Twenty six commercial (COM), 25 Cuino (CP) and 25 Mexican hairless (MHP) pigs were vaccinated with a commercial bacterin containing Salmonella, E. coli and Pasteurella at 45 days of age; a sample was taken a week later to test serum levels of interleukin 1 (IL-1 ), interleukin 4 (IL-4), interferon-gamma (INF- ) and alfa tumor necrosis factor (TNF- ). Cytokine quantification serum tests were carried out with commercial kits using the ELISA sandwich method. The Kruskal-Wallis test was used to compare cytokine concentrations and the Wilcoxon test was run to look for differences among breeds. IL-1 and IL-4 production was higher in HMS as compared to the other breeds. No significant differences between INF- and TNF- production were seen. Results suggest that MHP have a higher response capacity before an infection, compared to the other breeds.
  C. Lemus-Flores , R. Alonso Morales , J.G. Herrera Haro , M. Alonso-Spilsbury , R. Ram?rez-Necoechea and D. Mota-Rojas
  Several biotypes of the Mexicanc creole pig are in danger of extinction. This study was carried out in order to characterize the Mexican cuino pig. Growth, morphometry and reproductive traits are statistically described analysing the reproductive performance of 12 Cuino sows kept under confinement conditions. Average live weight was monitored at birth and 6 months later (0.86 and 43.84 kg, respectively). Results show that Cuino pigs tend to deposit more backfat than commercial breeds, their growth rhythm was adjusted to a polynomial equation (Y = 1.1138x2 - 4.0804x + 5.1355 R2 = 0.9955); it is slow at the beginning and after 91 days animals showed an accelerated growth. Average daily feed intake increased until pigs were five months old, from 0.403 to 1.930 kg., with an improved polynomial adjustment (Y = 0.2363x2 - 1.3129x + 5.7951 R2 = 0.82). Feed conversion was 4.596 in the first post-weaning month and 5.174 in the last month of fattening at 6 months. Cuino pigs are small, with short snout and a small number of teats. The variation in all the measured morphological variables was low (7.5 to 16.7%), this suggests that their morphology does not vary much. Prolificity of these pigs was low; the average number of pigs born alive was 4.95 with a litter birth weight of 4.35 kg and 4.12 weaned pigs with 16.09 kg at weaning. Present results indicate that the cuino pig has not been genetically improved since the time it has been in Mexico.
  M. Becerril-Herrera , O. Guzman-Pina , M. Alonso-Spilsbury , E.V. Dorsey-San Vicente , C. Lemus-Flores , S. Flores-Peinado , R. Ramirez-Necoechea and D. Mota-Rojas
  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.
  M. Becerril-Herrera , M. Zermeno , D. Mota-Rojas , G.H. Gonzalez , C. Casas-Garcia , J. Toca-Ramirez , R. Ramirez-Necoechea , J.A. Toca-Ramirez , C. Lemus-Flores and M. Alonso-Spilsbury
  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.
  D. Mota-Rojas , ADL.Reyes , M. Becerril-Herrera , S. Flores-Pintado , M. Alonso-Spilsbury , L.A.Cardona and C. Lemus-Flores
  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).
  M. Becerril-Herrera , C. Lemus-Flores , H.J.G. Herrera , M.Alonso-Spilsbury , R. Ramirez-Necoechea and D. Mota-Rojas
  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.
 
 
 
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