The effect of postulating diet intake on embryonic and fetal survival, and litter size in gilts

Abstract

Dyck, G. W. 1991. The effect of postmating diet intake on embryonic and fetal survival, and litter size in gilts. Can. J. Anim. Sci. 7l:6'75-681. The effect on reproductive performance of restriction of diet intake to body weight maintenance for l0 d after mating (R), versus a daily gain of 0.4 kg (C) was assessed in 264 Landrace (L) (C, 85,1% et R, 82,5%,P>0,10)etd60jours (C,87,8%aetP.,82,4%,P>0,10),nisurlatailledelaport6e(C,9,9 et R, 9,9 porcelets n6s vivants). La diff6rence due ir la race dans le taux de survie se rapproche de la signification ir 30 jours (Y x LY, 88,3 % contre L )(YL, 80/%, P:0,086) et diminue ir 60 jours (Y xLY,83J% contre LxYL, 81,4%, P:0,10). Les diff,irences dues d la race dans le nombre de porcelets n6s vivants nesontpassignificatives (YxLY, l0,2etLxYL,9,6porcelets,P:0,10

Effects of increased dietary energy after mating on developmental uniformity and survival of porcine conceptuses

“…This survival rate is close to that reported by Hughes (1989), who in reviewing 12 experiments with similar numbers of ovulations, calculated recovery rates of 77% for high-and 82% for low-energy-diets on d 25 to 30. The present results indicate approximately 23% mortality by d 10, with no difference between diets and is similar to a number of previously reported values for Yorkshire pigs at later stages of gestation (McGillivary et al, 1963;Buitrago et al, 1974;Toplis et al, 1983;Dyck, 1991).…”

Interactions between metabolic status, pre-breeding protein supplementation, uterine pH, and embrionic mortality in ewes: Preliminary observations

“…This trend has been reported in gilts (Dyck, 1991;Cassar et al, 1994), dairy cows (Elrod and Butler, 1993) and ewes (Wallace et al, 1994). The present study investigated the effects of two levels of supplementation with undegradable protein, in isoenergetic supplements meeting the rumen degradable protein requirement, on the fertility rate of ewes at low and high body condition.…”

Effects of Pre‐ and Post‐Mating Nutrition on Embryo Survival in Gilts

“…Low plane feeding, however, does not appear to have such negative effects. Anderson (1975), Dyck (1991) and Dyck & Strain (1979) found no effect of low plane feeding commencing fiom as early as 35 days before mating and continuing throughout early pregnancy on embryo survival. We have recently examined the effects of different planes of nutrition, both before and after mating, on embryo survival and function on day 12 (Ashworth et al 1995(Ashworth et al , 1996.…”