THE 2-PHASE COURSE OF CHANGES IN THE WEIGHT OF REPRODUCTIVE-ORGANS INTHE FEMALE RANA-LESSONAE CAM DURING ITS ACTIVE LIFE

The weight of ovaries and oviducts was examined in the sexually mature females of Rana lessonae Cam. in 7 periods of their active life. Ther e were changes in the weight of reproductive organs (''F'' at 8/107 de grees of freedom is 136.1 for ovaries and 78.7 for oviducts; P <0.001) . The greatest weight of both the ovaries and oviducts was noted befor e the ovulation (3rd decade of May), while the least after the breedin g period and laying eggs (1st decade of June). A considerable increase in the weight of ovaries was recorded in the 2nd decade of July, whil e in the oviducts in the 1st decade of September. In September the rep roductive organ reaches two thirds of its maximum weight. The weight o f ovaries is 1.7-2.6 times as great as that of oviducts. The course of development of the female reproductive organ in R. lessonae is simila r to that in R. esculenta.