Morphometric Characterization of Creole Sheep without Ear of the Sierra North State of Puebla-Mexico

摘要

Different animal breeds characterization, helps identify a population with unique features that differentiate it from others. For this reason, it is necessary for the conservation of these resources through programs of identification, characterization and genetic conservation, thus preventing the extinction of local breeds. The aim of this study is to characterize phenotypically Creole sheep without ears and typify the production system where it grows. This work was performed in three municipalities of the Sierra Norte of Puebla (Zacatl-n, Cuautempan and Tetela de Ocampo), involves three stages i. phenotypic characterization, ii. characterization of the production system and iii. data analysis. 11 Zoometric indices and 14 morphometric measurements were explored. For the characterization of the production system, these components were considered, productive, economic, agricultural, social and ranchers. Data were transported to Excel spreadsheets for analysis in the statistical program SAS. In morphological variables is seen a straight profile in 66% of the cases analyzed, the rest present a convex profile, the type of udder is globose by 64%. Sheep have a PV of 30.78 - 5.76 kg in females and 28.33 - 6.31 kg in males. The ALC of 51.80 - 4.86 cm in females, female AG 54.29 - 5.19 and 52.08 in male - 5.16 cm. With respect to the indices was observed ethnological an ICE of 57.30 cm to 57.05 cm IPE ICO of 80.64 cm. For there is a functional indices of IPRO 107.45 cm to 58.47 cm one IPRP the IPEL of 34.74 cm. The animals are raised by older farmers between 55.71 - 13.97 years with experience in the care of these animals 26.02 - 14.12 years and have surfaces below one hectare property. The Creole sheep without ears is a small animal with harmonious proportions, has a straight profile, medium-length neck and slightly muscular trunk is proportional to the size of the animal with narrow thorax and small udder, the limbs are thin, naked and well plumb. Producers are speaking Nahuatl and Totonac devoid of financial and technological capital and consider its production as a means of saving.