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Articles by R. Ram?rez-Necoechea
Total Records ( 2 ) for R. Ram?rez-Necoechea
  S?nchez-Aparicio P , M. Gonz?lez-Lozano , D. Mota-Rojas , M. Alonso-Spilsbury , M.E. Trujillo-Ortega , R. Ram?rez-Necoechea and 2R.E. P?rez-Galv?n
  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 exchange of cash or in species. The objective of the present study was to carry out a retrospective analysis of the records of 63 boars, in order to characterize the frequency of use, age, preferred breed by the public of the region, and distances walked and traveled by the boars in service in the Chinampa region of Xochimilco, Mexico City. An average of 0.19 to 0.27 mountings per day was observed which corresponds to 1.36 and 1.92 mountings per week. Boars had short intervals between mountings, one or two days, or else carried out one mounting per year, registering an average of 15.94 days between breedings. Boars older than twelve months had the highest number of mountings, more than 50, and were used only for one year. Surprisingly, males staying for 3 to 4 years, were not the ones that registered more mating activity since these pigs could not overcome an average of 40 mountings during their 4 years staying at the farm. Distances walked by boars during service, varied from 0.5 km in the Chinampa region, to 25 km in urban areas. The results obtained in this study indicate that the reproductive efficiency in backyard swine breeding can not be established due to the lack of an appropriate reproductive program. It is necessary to consider hygiene and health measures in all the boars, since the increase in annual number of mountings could also rise the risk of venereal diseases during contact with females from different origin and unknown hygiene habits.
  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.
 
 
 
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