Induction of puberty in gilts 1. The effects of rearing conditions on reproductive performance and response to mature boars after early puberty

摘要: Attainment of puberty and the ovulation rates for first three oestrous cycles were studied in gilts reared to 160 days alongside contemporary castrate or entire males before introducing them mature boars. Gilts which introduced boars at age reached younger ages lighter weights than isolated gilts. Rearing treatment did not affect puberty. from after earlier if they had been with rather males. The interval introduction oestrus was related weight time introduction. Ovulation rate pubertal same both groups, higher these groups induced into early by increased second third cycle differed only oestrus. In a experiment, reproductive performance approximately 218 experiencing either their first, studied. No differences found among conclusion is that similar mating takes place does performance.