Histological description of the reproductive tract of male and female hatchlings of the magdalena river turtle (podocnemis lewyana). Reportar como inadecuado




Histological description of the reproductive tract of male and female hatchlings of the magdalena river turtle (podocnemis lewyana). - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.



In this study we review the macro and microscopic description of the reproductive system of male and female Podocnemis lewyana neonates of 3.5 months of age. We found macroscopic differences in the morphology of the gonads, with ovaries being twice longer that testes, and testes being twice wider than ovaries. Microscopically we identified several immature elements, such as the lack of muscle layer in the oviduct of reptile females, and simple epithelia instead of pseudostratified epithelia in the oviduct and epididymis described in adults. We also describe a black pigment observed macroscopically in the mesovarium and macroscopically and histologically in the epididymis. This pigment is compatible with the center of melano-macrophages described in other vertebrates. Finally we described a supporting mesenchymal structure, the appendage of the oviduct, with was much longer than what has been described in other Podocnemis species.

Tipo de documento: Artículo - Article

Información adicional: La aceptación de manuscritos por parte de la revista implicará, además de su edición electrónica de acceso abierto bajo licencia Creative Commons CC Atribución-NoComercial-CompartirDerivadasIgual 3.0 http:-creativecommons.org-licenses-by-nc-sa-3.0-es-deed.es AR, la inclusión y difusión del texto completo a través del repositorio institucional  de la Universidad Nacional de Colombia y en todas aquellas bases de datos especializadas que el editor considere adecuadas para su indización con miras a incrementar la visibilidad de la revista.

Palabras clave: epididymis, histology, ovary, oviduct, pigment, testis.





Fuente: http://www.bdigital.unal.edu.co


Introducción



S E D E ACTA BIOLÓGICA COLOMBIANA B O G O T Á FACULTAD DE CIENCIAS DEPARTAMENTO DE BIOLOGÍA Artículo de INVESTIGACIÓN HISTOLOGICAL DESCRIPTION OF THE REPRODUCTIVE SYSTEM OF MALE AND FEMALE HATCHLINGS OF THE MAGDALENA RIVER TURTLE (Podocnemis lewyana) Descripción histológica del sistema reproductivo de machos y hembras de la tortuga del Río Magdalena (Podocnemis lewyana) ANDRÉS C.
SÁNCHEZ-OSPINA1, MV; BERARDO RODRIGUEZ1, Ph.
D.; CLAUDIA P.
CEBALLOS2, Ph.
D. 1 Grupo Quirón.
Escuela de Medicina Veterinaria, Facultad de Ciencias Agrarias, Universidad de Antioquia.
Medellín, Colombia.
acsovet@ gmail.com; birdo77@yahoo.com 2 Grupo GaMMA.
Escuela de Medicina Veterinaria, Facultad de Ciencias Agrarias, Universidad de Antioquia.
Medellín, Colombia. claudiaceb@gmail.com Author for correspondence: Claudia Ceballos, claudiaceb@gmail.com Received February 20th 2014, first decision May 14th 2014, accepted June 5th 2014. Citation - Citar este artículo como: SÁNCHEZ-OSPINA AC, RODRIGUEZ B, CEBALLOS CP.
Histological description of the reproductive system of male and female hatchlings of the Magdalena River turtle (Podocnemis lewyana).
Acta biol.
Colomb.
2014;19(3):427-435. ABSTRACT In this study we described the macroscopic and microscopic histology of the reproductive system of male and female Podocnemis lewyana neonates (3.5 months old).
We found macroscopic differences in the morphology of the gonads between the sexes, with ovaries being twice as long as testes, and testes being twice as wide as ovaries.
Microscopically, we identified several immature elements, such as the lack of a muscle layer in the oviduct of females, and simple epithelia instead of pseudostratified epithelia in the oviduct and epididymis described in reptile adults.
We also found a black pigment observed macroscopically in the mesovarium, and macroscopically and histologically in the epididymis.
This pigment is consistent with the center of melano-macrophages described in other vert...






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