Characterization of Boar Rental Schemes for Reproduction Purposes in a Swine Center in the Chinampa Region of Xochimilco, Mexico
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.