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Abstract:

Sexual maturity involves the differentiation of the reproductive system, the maturation of germ cells, and the development of secondary sexual characteristics. Even though this topic has received much attention, little is known about the sequence of events that encompass reproductive maturation in anurans and what it could reveal about the developmental basis of life cycle evolution. The discovery of froglets of Pseudis minuta with incipient vocal sacs calling in breeding pools alongside several larger adult specimens with fully developed vocal sacs raised the question of the timing of sexual maturity in this species. Here we describe the sequence and timing of differentiation, development and maturation of the vocal sac apparatus and the testes in P. minuta (Anura, Hylidae), in order to establish a timeline of events leading to sexual maturity. Differentiation of the vocal sac apparatus begins at the final metamorphic stages, earlier than reported for other species, and the vocal sac acquires its final shape during the early postmetamorphic period. These modifications occur after gonadal differentiation, which begins early during the larval period and proceeds with a highly accelerated rate of development (e.g., secondary spermatids appear well before metamorphic climax), a situation reported previously for other anuran species only in the genus Pseudis. These results, together with a skeletochronological analysis showing that some calling specimens presented no lines of arrested growth, indicate acceleration in the timing of sexual maturity in Pseudis, and raise questions about the interdependence/decoupling during the development of the different components involved in reaching the adult stage. © 2016 Elsevier GmbH

Registro:

Documento: Artículo
Título:Vocal sac development and accelerated sexual maturity in the lesser swimming frog, Pseudis minuta (Anura, Hylidae)
Autor:Goldberg, J.; Barrasso, D.A.; Agostini, M.G.; Quinzio, S.
Filiación:Instituto de Bio y Geociencias del NOA (IBIGEO-CONICET), CCT-Salta, 9 de Julio 14, 4405 Rosario de LermaSalta, Argentina
Instituto de Diversidad y Evolución Austral (IDEAus-CONICET), Bvd. Brown, Puerto Madryn, 2915, Argentina
Grupo de Estudios sobre Biodiversidad en Agroecosistemas (GEBA), Instituto de Ecología, Genética y Evolución de Buenos Aires, (IEGEBA-UBA-CONICET), Universidad de Buenos Aires, Pabellón II Ciudad Universitaria, CABAC1428EHA, Argentina
Palabras clave:Anurans; Gonadogenesis; Juvenile period; Life cycle; Vocal sac; animal; Anura; female; growth, development and aging; larva; male; physiology; sexual maturation; species difference; testis; Animals; Anura; Female; Larva; Male; Sexual Maturation; Species Specificity; Testis
Año:2016
Volumen:119
Número:6
Página de inicio:489
Página de fin:499
DOI: http://dx.doi.org/10.1016/j.zool.2016.07.001
Título revista:Zoology
Título revista abreviado:Zoology
ISSN:09442006
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09442006_v119_n6_p489_Goldberg

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Citas:

---------- APA ----------
Goldberg, J., Barrasso, D.A., Agostini, M.G. & Quinzio, S. (2016) . Vocal sac development and accelerated sexual maturity in the lesser swimming frog, Pseudis minuta (Anura, Hylidae). Zoology, 119(6), 489-499.
http://dx.doi.org/10.1016/j.zool.2016.07.001
---------- CHICAGO ----------
Goldberg, J., Barrasso, D.A., Agostini, M.G., Quinzio, S. "Vocal sac development and accelerated sexual maturity in the lesser swimming frog, Pseudis minuta (Anura, Hylidae)" . Zoology 119, no. 6 (2016) : 489-499.
http://dx.doi.org/10.1016/j.zool.2016.07.001
---------- MLA ----------
Goldberg, J., Barrasso, D.A., Agostini, M.G., Quinzio, S. "Vocal sac development and accelerated sexual maturity in the lesser swimming frog, Pseudis minuta (Anura, Hylidae)" . Zoology, vol. 119, no. 6, 2016, pp. 489-499.
http://dx.doi.org/10.1016/j.zool.2016.07.001
---------- VANCOUVER ----------
Goldberg, J., Barrasso, D.A., Agostini, M.G., Quinzio, S. Vocal sac development and accelerated sexual maturity in the lesser swimming frog, Pseudis minuta (Anura, Hylidae). Zoology. 2016;119(6):489-499.
http://dx.doi.org/10.1016/j.zool.2016.07.001