Body Weights, Adrenal Weights and Oestrous Cycles of Nutria

Abstract

Right and left adrenals were expressed as grams per kilogram body weight for 38 male and 31 female nutria. The average g/kg ratio is 0.627 for males, and 0.512 for females. There is a significant difference between right and left adrenals in both sexes (P < 0.001), the left adrenal being the larger in each sex. Body weights of one male and 3 females were recorded from 4 to 42 weeks of age. The sexual maturity of the females was reached at 5 months of age as indicated by vaginal opening.