Resumen de "Biostimulation methods" for breeding rabbit does: synthesis of the first results.
M. Theau-Clément, Cristiano Boiti
In this short synthesis the authors triad to drive sorne conclusions from 4 studies on breeding rabbit does biostimulation, conducted within the lnternational Rabbit Reproduction Group (IRRG). The aim of these biostimulations was the improvement of does' fertility after artificial insemination (Al). Ali experiments were conducted according a 42 days reproduction rhythm. The trial of flushing, i.e. momentary improvement of the energy balance of does 4 days before Al, failed to improve fertility. The main reason was the low palatability of the experimental diet: the daily energy intake was lower than with control diet. Transfer of does to another caga, 2 days befare Al, can improve fertility of adults does, but in opposition with literatura, was inefficient in nulliparous does. However this technique is difficult to manage in larga commercial rabbitries. Efficiency of biostimulation through separation of mother from her litter for a short period depends of the timing and duration of the stimulus. A 36 to 48 hours separatlon just befare Al may improve fertility by 7 to 30 points; but kits' weaning weight is reduced by 5% to 10%. Finally, further experiments are needed to know the practica! interest of a long term utilisation of such biostimulations, and to know the physiological mechanism.
