02004naa a2200301 a 450000100080000000500110000800800410001910000210006024501440008126000090022552011210023465000130135565000170136865000110138565000110139665000180140765000220142565000170144765300280146465300110149265300170150370000210152070000190154170000230156070000240158370000250160777300700163218096702017-03-30       2001    bl ---       0--  u    #d1 aSERENO, J. R. B.  aEstimacion del peso a la primera monta de novillas de las razas pantaneira, nelore y mestizas pantaneira x nelore en el Pantanal brasileno.  c2001  aThe objective os this work was to estimate the live weight at the first mount in the Pantaneira (P), Nelore (N) and crossbreed Pantaneira x Nelore (PxN) heifers. A total 98 females used, has been 51,24 and 23 from P,N and PxN heifers, respectively. All of heifers were born and growth up in typical native pastures at Brazilian Pantanal. In addtion they were weighted at the start and the end of breeding season, occasion where takes place the pregnant diagnosis by rectal palpation. These heifers weighted in average 225+-33kg (min=167 and max=325 kg) at the start of the season breeding with age average of 3.3+-0.63 years. The statistical analysis not showed significant difference (p=0.3595) to live weight at mounting between breeds. The heifers that became pregnant showed the following weights: 233 kg (n=32; min.=185 and max.=295 kg), 213 kg (n=19; min.=175 and max.=285 kg) and 241 kg (n=18; min.=180 and max.=320 kg), respectively, for N, P and PxN heifers. These results indicated that the live weight at the first mount was about 220 kg produced, exclusivelly, in native pastures from Brazilian Pantanal.  aPantanal  areproduction  aAnimal  aBovino  aConservação  aRecurso Genético  aReprodução  aAnimal genetic resource  aBovine  aConservation1 aPELLEGRIN, A. O.1 aLARA, M. A. C.1 aABREU, U. G. P. de1 aSERENO, F. T. P. S.1 aCHALITA, L. V. A. S.  tArchivos de Zootecnia, Cordobagv.50, n.189-190, p.159-163, 2001.