Resumen

SAMPSON, J.J.; DUCOING, A.E.  y  ALVAREZ, L.. Time of parturition in goats at the valley of Mexico (Capra hircus). Arch. zootec. [online]. 2012, vol.61, n.234, pp.297-300. ISSN 1885-4494.  https://dx.doi.org/10.4321/S0004-05922012000200014.

With the aim of determining the time pattern in parturition in the domestic goat in the valley of Mexico, the information of 832 births from 1991 to 1997 and 2000 to 2007 was evaluated. Diurnal (07:00-19:00 h) and nocturnal times (19:00-07:00 h) were considered in analysis. Tables of contingency and linear models were used, considering the breed, type of parturition, sex and weight of the kid and the season of the year. Distribution of parturition during the day was not homogenous (p<0.01). A high percentage of them (82%) were concentrated in diurnal times, with a clear peak (31%) between 11:00 and 13:00 h. Time of birth was neither associated with the breed of the mother, type of parturition, weight of the kid, sex of the young nor the season of the year (p>0.05). It is concluded that, in the valley of Mexico, the most of the goats' births (>80%) occurs during diurnal times, with a greater incidence between 11:00 and 13:00 h.

Palabras clave : Maternal behavior; Birth season.

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