Growth rate and survival rate up to weaning in Nilagiri and Sandyno lambs

摘要

ThegrowthrecordsofNilagiri(1965)andSandyno(1915)breedsofsheepfortheperiodfrom1993-2002availableattheSheepBreedingResearchStation(SBRS),Sandynallah#8211;643237,TheNilgirisDistrictwereutilizedforthestudy.Theeffectsofbreed,seasonofbirth,littersizeandsexofthelambsonbirthweight,weaningweight,averagedailygain(ADG)andmortalitywereanalyzed.Thelambsbornduringthesecondlambingseason(SLS)(2.62±0.06and11.9±0.33kg)weresignificantly(P0.01)heavieratbirthandweaningandtheADG(102.9±3.24g)wasalsosignificantlyhigherthanlambsbornduringthemainlambingseason(MLS)(2.21±0.05and9.02±0.31kg;74.8±3.24g).MortalitywashigherinlambsbornduringMarch(8.80%)thaninthosebornduringSeptember(7.03%).Sexofthelambhadahighlysignificantinfluenceonthebirthweight,weaningweightandADG.Themaleswereheavier,weighing2.46±0.06kg,10.8±0.32kgandgaining91.7±3.32g,thanfemales(2.37±0.06,10.2±0.32kgand86.1±3.29g).Singlebornlambs(3.07±0.12and11.1±0.06kg)wereheavieratbirthandweaningthantwins(2.25±0.02and9.69±0.12kg)andtriplets(1.93±0.16and10.7±0.19kg).Sandynolambshadabetterbirthweight,weaningweightandADG(2.56±0.06,10.8±0.32kgand90.3±3.33g)thanNilagirilambs(2.27±0.06,10.2±0.32kgand87.4±3.28g).nbsp;