. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Vol. LXXVIII, No. 3 June, 1940 THE BIOLOGICAL BULLETIN PUBLISHED BY THE MARINE BIOLOGICAL LABORATORY THE REPRODUCTIVE CYCLE OF THE VIVIPAROUS TELEOST, NEOTOCA BILINEATA, A MEMBER OF THE FAMILY GOODEIDAE II. THE CYCLIC CHANGES IN THE OVARIAN SOMA DURING GESTATION GUILLERMO MENDOZA (From the Department of Zoology, University College, Northwestern University) INTRODUCTION In an introductory article on the reproductive cycle of Neotoca bill- ncata, an account was given of the breeding cycle of the female as ob- served in the lab
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Vol. LXXVIII, No. 3 June, 1940 THE BIOLOGICAL BULLETIN PUBLISHED BY THE MARINE BIOLOGICAL LABORATORY THE REPRODUCTIVE CYCLE OF THE VIVIPAROUS TELEOST, NEOTOCA BILINEATA, A MEMBER OF THE FAMILY GOODEIDAE II. THE CYCLIC CHANGES IN THE OVARIAN SOMA DURING GESTATION GUILLERMO MENDOZA (From the Department of Zoology, University College, Northwestern University) INTRODUCTION In an introductory article on the reproductive cycle of Neotoca bill- ncata, an account was given of the breeding cycle of the female as ob- served in the laboratory (Mendoza, 1939). In this second paper of the series, a description is given of the changes which the ovarian soma undergoes during gestation. Previous articles on the reproductive cycles of viviparous teleosts usually have failed to give complete accounts of the somatic cycle although the later papers on Fitsroyia lincata (Scott, 1928), Xiphophorus hcllcri (Bailey, 1933), and Cyinatogaster aggrec/atits (Turner, 1938) are notable exceptions. It is the purpose of this account first, to supplement the original, brief description given by Turner in 1933 and second, to contribute to a better understanding of the marked changes which a typical viviparous ovary undergoes during gestation. The discussion includes (1) a brief reference to the gross morphology of the ovary, (2) the general ovary-embryo relations, and (3) a detailed account of the cyclic changes in the ovigerous folds, the epithelium, the free cellular elements, and the blood supply. MATERIALS The ovaries used in this investigation are from females whose breed- ing cycles were closely followed in the laboratory (Mendoza. 1939). A complete series was obtained ranging from virgin and non-gravid ovaries through all stages of gestation to an ovary undergoing involution three hours after the birth of the young (Table I). In the discussion to follow, ovaries will be referred to, not by the number of the female, but by t
Size: 1619px × 1544px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
