Changes in Plasma Sex Steroids in Females of Two Sympatric Leptodactylus from Subtropical South America
Leptodactylus ocellatus is a well-known neotropical anuran in Argentina and Brazil, typically inhabiting marshes and streams, from sea level to 1000-1200 m in the Pampean mountains. Leptodactylus ocellatus is sympatric with L. chaquensis in Paraguay and on the Parana borders. Previous work (Cei, 19...
| Autores principales: | , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Español |
| Publicado: |
1996
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/89056 |
| Aporte de: |
| id |
I19-R120-10915-89056 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Español |
| topic |
Zoología Androgens Frogs Ovaries |
| spellingShingle |
Zoología Androgens Frogs Ovaries Mosconi, G. Cei, José Miguel Alfredo María Ibañez, N. Álvarez, B B. Carnevali, O. Battisti, A. Polzonetti-Magni, A. M. Changes in Plasma Sex Steroids in Females of Two Sympatric Leptodactylus from Subtropical South America |
| topic_facet |
Zoología Androgens Frogs Ovaries |
| description |
Leptodactylus ocellatus is a well-known neotropical anuran in Argentina and Brazil, typically inhabiting marshes and streams, from sea level to 1000-1200 m in the Pampean mountains.
Leptodactylus ocellatus is sympatric with L. chaquensis in Paraguay and on the Parana borders. Previous work (Cei, 1948,1949,1950,1980; Cei et al., 1955) with these two sibling species, L. ocellatus and L. chaquensis, revealed diversity in their reproductive cycles. Leptodactylus ocellatus exhibits less gametogenetic discontinuity and variety of secondary sex characters; the annual ovarian cycle of L. chaquensis, involves a fallwinter period of atresia for the residual mature oocytes from the former cycle, and at the same time a progressive auxocytic activity. The spring-summer period of mating and egg-laying of L. chaquensis is followed by resorption of retained oocytes. Moreover, in both sexes, a striking seasonal rhythm in the development of secondary sex characters has been found, together with dramatic growth of skeletal humeri and significant variation in serum calcium values (Cohen 1962a, b, 1963). |
| format |
Articulo Articulo |
| author |
Mosconi, G. Cei, José Miguel Alfredo María Ibañez, N. Álvarez, B B. Carnevali, O. Battisti, A. Polzonetti-Magni, A. M. |
| author_facet |
Mosconi, G. Cei, José Miguel Alfredo María Ibañez, N. Álvarez, B B. Carnevali, O. Battisti, A. Polzonetti-Magni, A. M. |
| author_sort |
Mosconi, G. |
| title |
Changes in Plasma Sex Steroids in Females of Two Sympatric Leptodactylus from Subtropical South America |
| title_short |
Changes in Plasma Sex Steroids in Females of Two Sympatric Leptodactylus from Subtropical South America |
| title_full |
Changes in Plasma Sex Steroids in Females of Two Sympatric Leptodactylus from Subtropical South America |
| title_fullStr |
Changes in Plasma Sex Steroids in Females of Two Sympatric Leptodactylus from Subtropical South America |
| title_full_unstemmed |
Changes in Plasma Sex Steroids in Females of Two Sympatric Leptodactylus from Subtropical South America |
| title_sort |
changes in plasma sex steroids in females of two sympatric leptodactylus from subtropical south america |
| publishDate |
1996 |
| url |
http://sedici.unlp.edu.ar/handle/10915/89056 |
| work_keys_str_mv |
AT mosconig changesinplasmasexsteroidsinfemalesoftwosympatricleptodactylusfromsubtropicalsouthamerica AT ceijosemiguelalfredomaria changesinplasmasexsteroidsinfemalesoftwosympatricleptodactylusfromsubtropicalsouthamerica AT ibanezn changesinplasmasexsteroidsinfemalesoftwosympatricleptodactylusfromsubtropicalsouthamerica AT alvarezbb changesinplasmasexsteroidsinfemalesoftwosympatricleptodactylusfromsubtropicalsouthamerica AT carnevalio changesinplasmasexsteroidsinfemalesoftwosympatricleptodactylusfromsubtropicalsouthamerica AT battistia changesinplasmasexsteroidsinfemalesoftwosympatricleptodactylusfromsubtropicalsouthamerica AT polzonettimagniam changesinplasmasexsteroidsinfemalesoftwosympatricleptodactylusfromsubtropicalsouthamerica |
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Repositorios |
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1764820490108534786 |