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vol.8 número1Evaluación del impacto económico potencial de los parásitos del ganado bovino en México. RevisiónEvaluación de parámetros productivos y reproductivos en un hato de doble propósito en Tabasco, México índice de autoresíndice de materiabúsqueda de artículos
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Revista mexicana de ciencias pecuarias

versión On-line ISSN 2448-6698versión impresa ISSN 2007-1124

Resumen

RENDON DEL AGUILA, Juan Uriel; MARTINEZ-GAMBA, Roberto Gustavo; HERRADORA LOZANO, Marco Antonio  y  ALONSO-SPILSBURY, María. Effect of birth weight, litter size and nipple position on growth of pigs during lactation and fattening. Rev. mex. de cienc. pecuarias [online]. 2017, vol.8, n.1, pp.75-81. ISSN 2448-6698.  https://doi.org/10.22319/rmcp.v8i1.4317.

Growth during lactation and feeding was evaluated for low birth weight (runt) piglets in 32 high prolificacy litters using three birth weight categories (low, medium, and high) and three litter sizes (small, medium and large). The teat secured during birth and lactation by each studied piglet was identified. An analysis was done of the effects of the birth weight and litter size categories the variables weight and weight gain during lactation and feeding; back fat; loin depth; and carcass yield at 160 d. High prolificacy litters had a higher proportion of low birth weight piglets (26 %) than low prolificacy litters (4 %). Low birth weight piglets took longer to suck the teat (50.37 min) than the medium (32.44 min) and high weight piglets (24.34 min). Most (67 %) of the runts were positioned largely on the sow’s posterior teats. Low weight piglets exhibited lower weight gain (181 g/d) than the medium (211 g/d) and high weight piglets (240 g/d). Their weight at 160 d (86.6 kg) was also lower than in the medium (95.7 kg) and high weight piglets (101.1 kg). In high prolificacy litters, low weight piglets (runts) exhibited the lowest growth performance, independent of litter size and lactation teat.

Palabras llave : Low birth weight; Piglets; Teat; Litter size.

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