Índices de produtividade e análise econômica de um sistema de produção de ovinos de corte no Semiárido

The present research aimed to evaluate the reproductive efficiency, productive and economic indexes of Santa Inês and F1 Dorper ewes submitted to the reproduction model of a semiarid calving per year, as well as the growth characteristics of the lambs. A total of 93 ewes kept semi-extensively during two productive years from 2016 to 2017 were used. To evaluate the reproductive and productive efficiency of the ewes were calculated fertility, prolificacy, total birth weight (PTCN), weight total lambs weaned (PTCD), total weight of weaned lamb (PTCD) per farrowing lamb. For the growth characteristics of the lambs, birth weight (NW), weight at 28 days (P28), weight at weaning (PD) and average daily weight gain (GPMD), mortality of lambs were studied. Carcass characteristics were evaluated by average slaughter weight, hot and cold carcass weight and carcass yield as a function of weaning age and sex. The mathematical models used in the statistical analyzes included the fixed effects of the ewe and lamb genetic group, productive year, type of birth, sex of lambs, age of lambs, body condition score classes, age of ewe at calving and covariate coverage and all possible interactions. There was an effect (P