Caractérisation morphologique des troupeaux ovins dans la région de

Abstract

This investigation is taking about the sheep’s morphologically caractérisation which has concerned Thirty traits (eighteen quantitatives and twelve ordinals) and concerned in the area of Setif (Algeria). Data were analyzed using a variance analysis which allow doing a comparison of means by the least’s squares witch used the model of fixes’ effects and using discriminate analysis; the aim was to identify the most discriminate traits, rate of distinction between flocks and to describe morphologically the flocks under investigation. After the results of a variance analysis, we were to say that there isn’t a breed with standard but there are only sheep’s populations. There is a large diversity between and within flocks, sites and zones of the studied area. Among the 30 traits studies at the rams, seven were present in all masculine flocks which are: the color white of head, wool and paws, the absent of horns, the good conformation and the extent semi- overwhelming of wools which considered as an oeuvre joint resemblance traits between all the masculine flocks. Through against at the féminin flocks, we have six œuvre joint resemblance traits at all the féminin flocks witch are the color white of the head, wool and paws, the absent of horns, the closing of the texture’s wool and the udder’s development. The factorial discriminate analysis is revealing that the descriptors which allow differentiating better the masculine flocks are: the back height, chest‘s tower, ear length and the ischions’s width for the first axis. The neck length, back height, chest‘s tower and the ischions’s width for the second axis. At the feminine flocks, the descriptors of the best differentiation are: the sacrum height, chest’s depth and the head length for the first axis. The chest‘s tower, the head length, chest’s depth and the sacrum height for the second axis. Flocks were different from each other and the correct classification for all masculine flocks was 50.2 % and 37.8% for all the feminine flocks witch confirm also the get results.