1. Unión de Criadores de Toros de Lidia (UCTL): This is the main breed registry for fighting bulls in Spain, and is recognized as the official studbook of the breed by the Ministerio de Agricultura, Pesca y Alimentación (MAPA). Its mission is to preserve and enhance the purity and genetic diversity of fighting bulls, as well as to promote their breeding and development. This organization maintains accurate genealogical records and sets standards for the bulls they register. It oversees breeding farms and performs inspections to ensure the quality and characteristics prescribed by the regulations.
2. Asociación de Ganaderos de Reses Bravas (AGRB): Another important breed registry for fighting bulls in Spain, this organization aims to protect and ensure the genetic diversity of bulls for bullfighting. They establish criteria and regulations for selecting individuals based on their lineage, morphology, behavior, and performance while ensuring genetic improvement.