Über den Einfluß der Umwelt auf die Eierstöcke der Tritonen

Stieve, H.

doi:10.1007/bf02084271

Cited by 16 publications

References 27 publications

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Sexual conditions in Triturus viridescens. III. The reproductive cycle of the adult aquatic form of both sexes

Adams

1940

Am. J. Anat.

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The understanding of a normal animal is a requisite for the interpretation of the results of experiments on that animal.Partly for this reason and partly because of the interest in following the annual reproductive cycle of an adult urodele, both sexes of the aquatic phase of Triturus viridescens were collected in every month of the year from one locality and their gonads and secondary sexual characters studied. Several investigators have already considered the life history of this form and certain phases of the reproductive cycle, especially in the male (Pike, 1886 ; Gage, 1891 ; Jordan, 1891,1893 ; Pope, '24 ; Humphrey, '21, '22, '25, '26 ; Hargitt, '24 ; Obreshkove, '24 ; Noble, '29 ; Hilsman, '32 a, b, ' 3 3 ) . Data on gonadal size, however, are restricted to a few isolated observations and in some instances are difficult to analyse because it is not clear in which month of the year the newts were caught. MATERIAL AND METHODSAdult newts of both sexes were collected from the water of Lithia Springs, near South Hadley, Massachusetts, in each month of the year, usually at intervals of 2 or 4 weeks. On

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Sexual conditions in Triturus viridescens. III. The reproductive cycle of the adult aquatic form of both sexes

Adams

1940

Am. J. Anat.

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The function of leucocytes in the growth and regression of the egg of triturus viridescens

Liebman

1945

Am. J. Anat.

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N w J e r s~y THREE PLATES (TKENTY-THREE FIGURES) The ovarian eggs of Amphibia, like those of numerous other animals, undergo periodic changes of growth and involution in which the leucocytes are known to play some important function.Since His (1873) first described leucocytes in the vertebrate ovary and their apparent penetration into the egg, opinions as to the nature of this phenomenon remained largely divided. The majority of investigators maintained that the eggs were degenerating and the leucocytes were phagocytosing their substance. A minority, however, held that the eggs were healthy and that the leucocytes found in them were ingested and assimilated by the ova, thus serving as nutrient. Only a few investigators maintained that both viewpoints are tenable. Studies on this subject in amphibians are not numerous and the majority deal with leucocytes only secondarily, attention being centered on the follicle cells which exhibit a somewhat similar relation to the egg as the leucocytes. 0. Schultze (1887) first found and briefly described white blood-cells in the frog egg. Ruge (1889) gave a full description of these cells and studied in great detail their pliagocytic activity in the invo-

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Effects of hypophysectomy on the reproductive system of salamanders

Burns

Buyse

1932

Anat. Rec.

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Über den Einfluß der Umwelt auf die Eierstöcke der Tritonen

Abstract: Ein Beitrag zur Frage naeh der Vererbbarkeib erworbener Eigenschaften und der Parallelinduktion. Von IL Stieve, Halle a. S. (Untersuchungen, ausgefiihrt mit Unterstiitzung aus der Samson-Stiftung der Bayrischen Akademie der Wissenschaften in Miinchen.

Cited by 16 publications

References 27 publications

Sexual conditions in Triturus viridescens. III. The reproductive cycle of the adult aquatic form of both sexes

Sexual conditions in Triturus viridescens. III. The reproductive cycle of the adult aquatic form of both sexes

The function of leucocytes in the growth and regression of the egg of triturus viridescens

Effects of hypophysectomy on the reproductive system of salamanders

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