FOUR FIGURESThe purpose of this work was to investigate the reproductive cycle of a non-hibernating wild mammal. The cottontail rabbit (Sylvilagus floridanus mearnsi Allen) was selected for this study because it is an abundant species of wide occurrence and of great economic importance. The weight changes in the endocrine glands directly related to the breeding cycle and the changes in the accessory reproductive organs of both male and female cottontail rabbits have been followed throughout the year t,o determine the relationship which exists between the degree of development of the reproductive tract and the gonadotropic content and percentage of cell types in the pituitary gland. The endocrine factors in the sexual cycle of a hibernating wild mammal, the thirteen-lined ground squirrel, have been thoroughly investigated, but complete results have been published only for the male sex (Wells, '35 and '38; Moore et al., '34; Nelson, '36). Brief notes on the measurements of the gonads of cottontail rabbits have been recorded by Hamilton ( '40), Dalke ( '37), and Trippensee Supported in part by a grant from the Wisconsin Alumni Research Foundation
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.