01591nam a2200337 a 450000100080000000500110000800800410001910000200006024500790008026000430015930000100020249000300021252007450024265000090098765000180099665000100101465000110102465000140103565000140104965000090106365000170107265000230108965000180111265000150113065000100114565000170115565300300117265300200120265300130122270000180123515214992023-12-12       1937    bl uuuu      00u1 u    #d1 aMCKENZIE, F. F.  aEstrus, ovulation and related phenomena in the ewe.h[electronic resource]  aColumbia: University of Missouric1937  a88 p.  a(Research Bulletin, 264).  aAbstract: A section of this bulletin deals with the effect of nutrition. An experiment is described in which 40 grade Rambouillet ewes were divided into 2 comparable groups. One group received hay only, the other hay plus meals. A pronounced difference in condition due to feeding resulted. Oestrus was detected by teaser rams. Laparotomies on 1.5 ewes from each group were performed. The other 5 ewes in each group were inseminated. There were 10 twin ovulations in the better fed group as against 4 in the other. The lower plane of nutrition resulted in a lengthening of the oestral cycle without lengthening oestrus, in a shortening of the pre-ovulatory period, and in a shortening of the breeding season by 11/2 months. A. H. H. Fraser.  aEwes  aFeeding level  aFeeds  aForage  aGrass hay  aOvulation  aRams  aReproduction  aRuminant nutrition  aSheep feeding  aFisiologia  aOvino  aReprodução  aComportamento reprodutivo  aHistofisiologia  aOestrous1 aTERRIL, D. E.