Productive Performance of Sheep in an Agropastoral System on the Coast of Oaxaca, Mexico

Objective: To determine the prolificacy and weight of lambs at birth (BW) in twogenotypes hair sheep within an agropastoral system on coast Oaxaca, Mexico,and to evaluate effect two sources selenium performance fromsaid during fattening phase.Design/Methodology/Approach: The study was carried out system(coconut palm Cynodon dactylon grass) Río Grande, Oaxaca. Two experimentswere conducted; first studied 58 ewes distributed a completely randomized design(CRD) with factorial arrangement 2x2x3, focused following fixed effects:genotype, number births, body condition (BC). measured variables wereprolificacy BW. second experiment 23 4 months age thatwere offspring females 1. They were CRD withthree treatments: T1, without provided; T2, barium selenate T3,with selenomethionine provided. dependent daily gain(DWG), dry material consumption (DMC), feed conversion (FC). Results: Pelibuey one births Black Belly onebirth demonstrated highest averages (P?0.05). lowest averages(P?0.05) detected BC irrespective births. BW wasaffected (P?0.05) by genotype; weighed 680 g more thatPelibuey lambs. DWG, DMC FC behaved similarly betweentreatments their general 0.114 kg day -1 , 0.679 6.18,respectively.Study Limitations/Implications: In system, limitstheir reproductive performance. start fatteningdetermines fattening.Findings/Conclusions: femalespresent adequate BW; however, it is very important that theyremain 3. Neither improves DMC, andFC fattened pens system.