动物造模 z-bio 2022-11-10 638

　　Objective: To analyze the relationship between species differences and intestinal morphology and energy metabolism, and to clarify the energy requirements of gerbils.

　　METHODS: Ten gerbils, SD rats and ICR mice were housed individually in metabolic cages, and the feces and urine of the animals were collected within 24 hours for 5 days. After measuring the volume and weight of urine and feces, respectively, the urine energy and fecal energy were sent for testing. After the collection, all animals were weighed, the abdominal aorta was sacrificed after anesthesia, and the intestines of the animals were taken to measure the length of the intestines.

　　Results: The digestive energy and metabolizable energy maintained by rats were 314.56 kJ/d and 314.55 kJ/d, respectively, 10.608 kJ/d and 9.799 kJ/d in mice, and 99.828 kJ/d and 99.927 kJ/d in gerbils, respectively. . The digestible energy and metabolizable energy required per 1 g body weight gain in rats were 19.273 kJ and 18.831 kJ, respectively, 71.842 kJ and 72.390 kJ in mice, and 56.142 kJ and 55.965 kJ in gerbils, respectively. The total length of the digestive tract of rats and mice is larger than that of gerbils, and the small intestine of rats is the longest, while the gerbils have a larger percentage of cecum.

　　CONCLUSIONS: There were significant differences in gut length and energy requirements among the three animals.