Summary: The decrease in the strength of certain breeds of donkeys Spanish (Andalusian Catalan, Malloquina, Ass of detail and Zamorano-Leonés) has led to the state of endangered breeds RD (1682,
1997) with a great confusion descriptive its features ethnological. This thesis has focused on a part of Phase II (along FAO) conservation program, specifically the morphological characterization, haematological and clinical biochemistry. The results generated will contribute to better understanding of these races as well as better management of their conservation programs.
