[The effect of the nutritional energy concentration on embryonic and fetal losses in the female rabbit].
The laparoscopy technique was used to examine the effects of feeding 2 concentrations of energy and protein on the reproductive parameters in the doe rabbit. Forty-one does were laparoscopized on day 12 of gestation in order to estimate the ovulation rate and embryo number. Diets 1 and 2 contained 13.0 and 9.7 MJ digestible energy per kg DM and 159 and 135 g crude protein per kg DM respectively. The ovulation rate, number of implanted embryos at 12 d and total litter size at birth were similar for diets 1 and 2 (13.4 vs 14.2, 12.6 vs 12.8 and 9.1 vs 10.8), but the live litter size at birth was higher for diet 2 (7.1 vs 9.8). Laparoscopy is invaluable in determining the effects of diets on oestrus and birth rates in living and sexually active does.
Viudes-de-Castro
P
P
Universidad politecnica de Valencia, departamento de ciencia animal, Valencia, Espagne.
Santacreu
M A
MA
Vicente
J S
JS
D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004044:Dietary Proteins / Q000008:administration & dosage; D004435:Eating; D010064:Embryo Implantation; D002149:Energy Intake; D005260:Female; D008098:Litter Size; D010060:Ovulation; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000502:physiology*; D011817:Rabbits / Q000502:physiology*
D004044:Dietary Proteins
Effet de la concentration energétique de l'alimentation sur les pertes embryonnaires et foetales chez la lapine.