Seasonal variations in fat body metabolism of the green frogRana esculenta (L.)

Abstract
Rana esculenta (L.), kept under natural conditions, show almost constant body weights in the annual cycle. Fat body weight, however, has a distinct maximum in October decreasing continuously to a May minimum which is also evident in the fat body index. The triglyceride and protein contents show the same course. Surprizingly high amounts of glycogen are found, which reach a maximum in August.