干旱区生态环境知识资源中心

A total of 349 records of kidding was used to evaluate frequency by month and geographical area. Regions studied were Paraguana, Pedregal, and Aregue, located in arid environments to altitudes of 20, 250, and 600 m.a.s.l respectively. Flocks are range managed and the direct fraction of genes Creole averaged 95%. Proc Freq of SAS was used to estimate frequencies by month and geographical area. Results show two picks for kidding, clearly demarcated, but with significant variation among regions. The accumulated frequency in the first two and last four months of the year reached values of 36.8, 31.6, and 16.7 and of 48.5, 45.2, and 64.0% in the regions of Pedregal, Paraguana, and Aregue respectively. Kidding picks are indicative of two mounting seasons that begin with the rains of months of April and August. Long and by region variation are indicative that mounting season can be managed in benefit of a better production.