Resumen

NISTAL, A.J.; MAZUFERO, K.; ZAPATA, M.D.  y  DI MASSO, R.J.. Destete hiper-precoz y crecimiento post-destete de gazapos de chinchilla (Chinchilla lanigera). Rev. vet. [online]. 2018, vol.29, n.1, pp.31-34. ISSN 1669-6840.  http://dx.doi.org/10.30972/vet.2912787.

In chinchilla the average duration of lactation is 60 days. Available experimental evidence on the feasibility of its shortening indicates that neither anticipated weaning (42 days) nor early weaning (32 days) negatively affect the post-weaning growth of the offspring. The objective of this study was to evaluate the effect of hyper-precocious weaning (25 days of age) on the daily weight gain of the offspring in the immediate post-weaning period, according to their body weight prior to the separation of the mother, in order to determine the feasibility of further maximizing this management strategy. A total of 21 pups belonging to litters of two individuals, were evaluated. Pups were separated from their mothers by 25 days of age and divided into three categories according to their individual weaning weight: those with body weights below the 33rd percentile (light group); those with weights included between the percentiles 33 and 66 (intermediate group) and those with body weights upper the percentile 66 (heavy group). The results indicate that, regardless of the weight of the pup when separated from its mother, weaning at 25 days of age is a practice feasible to be applied in chinchilla commercial breeding systems, as it does not affect negatively the subsequent growth of the offspring. At the same time, this practice fulfills the objective of allowing the female to interrupt her lactational anestrus and so resume before to the reproductive cycle, thereby contributing to a decrease in the inter-partum period

Palabras clave : Chinchilla lanigera; body weight; pre-weaning and post-weaning growth; lactation; reduction lactational anestrus.

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