Acceso usuarios
Eder Espinoza, Jaima García, Ana Rosa Carrillo Ávila, Héctor Martínez Sánchez
Se analizó la conducta alimentaria de ratas con acceso restringido a alimento sólido registrando el peso corporal, los consumos de alimento, kilocalorías, agua y alter- nando leche con baja y alta densidad calórica. Se asignaron 15 ratas macho a dos grupos experimentales y uno control. Se registró el peso de todos los sujetos con alimento ad libitum. Posteriormente tuvieron acceso libre al alimento sólido, agua y leche durante 1 hora diaria. Cada grupo experimental tuvo acceso a un tipo de leche de alta o baja densidad calórica que posteriormente se invirtió y se realizó una prueba de preferencia a los dos tipos de leche. El grupo control no tuvo acceso a la leche. Se encontró mayor ingesta de las calorías aportadas por la leche de alta densidad calórica que con la de baja densidad. No hubo diferencias en los grupos en el total de calorías ingeridas por alimento y leche. En la prueba de preferencia no se encontraron diferencias entre los grupos experimentales. Concluimos que la ingesta diaria de calorías total fue independiente de la densidad calórica de la leche y hubo regulación del consumo de alimento sólido, controlando así el número de calorías totales ingeridas diariamente.
Feeding behavior of rats with restricted access to solid food was analyzed by record- ing body weight, food consumption, kilocalories, water, and alternating two types of milk containing low or high caloric density. Fifteen male rats were assigned to two experimental and one control groups. After recording ad libitum body weight of all subjects, rats had free access to solid food, water and milk for 1 hour daily. Each experimental group had access to one type of milk, either high or low caloric density that was inverted in a subsequent condition. Afterwards, a preference test for the two types of milk was conducted for the two experimental groups. The control group had no access to milk. Caloric intake contributed by high-caloric density milk was higher relative to low-caloric density milk. However, there were no differences between groups in the total calories provided by food and milk. No differences were found between the experimental groups in the preference test. It was concluded that the total daily calorie did not depend on the caloric density of milk and there was also a regulation of solid food consumption that controlled the number of total calories ingested daily.
