The chapter addresses the importance of minerals in the diet of cattle in a tropical climate to maintain their body condition in relation to productive activity and especially reproductive activity, this importance falls on the physiological processes within the animal organism considering that fantastic world that explain the phenomena that occur within the organism that are important processes since they maintain cellular homeostasis, this allows the generation of cells of the body structure as well as male and female gametes that influence the conservation and maintenance of biochemical phenomena with the emphasis on conserving the organic status that, when unbalanced, generates fertility problems, affecting above all milk and meat productivity, generating economic losses in cattle ranches in southern Mexico. It is convenient to indicate that Mexican soils in a great proportion present deficiencies of minerals such as zinc, selenium, boron, chromium, a few to comment that along with forage production, this is accompanied to produce infertility phenomena in cattle. in grazing that influence the presentation of heats, corresponding to artificial insemination as well as problems in ovarian pathologies that inhibit ovarian cycling and become unprofitable, for this reason this the minerals in the diet is important so that the profitability of milk and meat benefits the producers of the countryside in southern Mexico
Se conoció la distribución regional y se estimó la densidad poblacional (DP) del venado temazate rojo (Mazama temama: Kerr, 1792) en la Sierra Negra del estado de Puebla, México. La distribución del cérvido en la región abarca una superficie de 27.303,02 ha., con tipos vegetativos de bosque mesófilo de montaña y bosque tropical perennifolio en cuatro municipios, a una altitud entre 150 y 1650 msnm, siendo la zona núcleo el volcán Tzintzintépetl (3250 msnm). La DP se estimó entre 5,5 y 4,2 individuos/km2, lo que resulta semejante a las DP obtenidas en otras regiones de México, además de que este cérvido es simpátrico en la región con el venado cola blanca (Odocoileus virginianus:Zimmermann,1780). Se concluye que el venado se encuentra en estado de fragilidad en la Sierra Negra, por lo que se recomienda crear un área natural protegida (ANP) en el volcán Tzintzintépetl, continuar con los estudios de DP en los sitios muestreados y otras áreas de la sierra, con la finalidad de crear un Sistema de Unidades de Manejo para la Conservación de la Vida Silvestre o SUMA, orientadas al turismo de naturaleza.
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