REARING-DIET STRATEGY AND PRODUCTIVE LONGEVITY OF CROSSBREED RABBIT DOES

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Savietto, Davi | Martínez-Paredes, E. | Ródenas, Luis | Baselga, Manuel | Cervera, Concha | Blas, Enrique | Pascual, Juan Jose

Edité par CCSD ; World-rabbit-science -

International audience. A total of 619 crossbreed rabbit does were controlled from 63 days old to the time of death, culling orcensored record (7% of censored records with a minimum age of 647 d) to evaluate how rearing-dietstrategy can affects the productive their life span. During the rearing period (from 63 days old to 1stparturition), the animals were divided in two groups, according to the diet received. A total of 308females received a control diet (C; 18.4% crude protein and 19.5% acid detergent fibre) and 311females received a fibrous diet (F; 13.4% crude protein and 23.4% acid detergent fibre). The dietreceived during this period affected rearing development, reproductive performance and lifespan ofrabbit does. The use of the diet F seems to avoid the possible overconditioning of young females feddiet C at first insemination (−238 g of live weight and −0.35 mm of perirenal fat thickness; P<0.05),and it did not affect their long term reproductive performance (49.5 and 51.0 kits born alive per femalefor diets C and F, respectively). Young females reared with diet F lived on average 46.4 days longerthan those receiving diet C (P<0.05), which also occurred at early reproductive life (+4.0 and +5.0 %at 2 nd partum and weaning time, respectively). This longer life lead to a higher total production of kitsper female reared (+7.4 kits born alive per female; P<0.05).

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