Morfología de la glándula del clasper de potamotrygon magdalenae (elasmobranchii: potamotrygonidae)
Se determinó la morfología externa e interna de las glándulas de clásper y su relación con la adquisición de madurez reproductiva en una serie de individuos machos de diferentes estadios (embriones, neonatos, juveniles y adultos activos y en reposo reproductivo) (n=35) de Potamotrygon magdalenae. La...
- Autores:
-
Anaya Lopez, Yenith Paola
- Tipo de recurso:
- http://purl.org/coar/version/c_b1a7d7d4d402bcce
- Fecha de publicación:
- 2016
- Institución:
- Universidad Industrial de Santander
- Repositorio:
- Repositorio UIS
- Idioma:
- spa
- OAI Identifier:
- oai:noesis.uis.edu.co:20.500.14071/34248
- Palabra clave:
- Actividad Secretora
Clásper
Glándula Del Clásper
Histología
Potamotrygonidae.
The external and internal clasper gland morphology of Potamotrygon magdalenae was determined and its relation with the acquisition of reproductive maturity in a number of male individuals of different stages (embryonic
neonates
juveniles and reproductively active and idle adults) (n=35). The glands are subdermal glandular masses in the proximal base of each clasper. They are semi-bilobate organs with a ventral groove which has a row of papillae. The glands tend to be asymmetric; left ones have larger sizes and development
trend observed in other organs of elasmobranchs. Histologically
they are formed of tubular glandular units with simple columnar epithelium
basal nuclei and granular eosinophilic cytoplasm; the basal lamina is made up of loose connective tissue fibers and fibroblasts
the gland is covered by two layers of striated muscle tissue in circular and longitudinal arrangement. The secretion of these glands is asynchronous and of holocrine type
PAS+/AB+ secretion reaction suggests the presence of glycoproteins and sulfated acid mucopolysaccharides. The glands begin to develop in neonates and in juveniles their secretory activity. The size of the glands has a positive and direct relationship with the disk size
measurement of the animal´s body size. Significant differences in the sizes of the glands between mature males and the remaining three reproductive states were found
suggesting that the acquisition of the sexual maturity implies the increase in the size of the gland due to its high secretory activity. Therefore
these glands should have an endocrine control and function clearly associated with the reproductive activity of males
- Rights
- License
- Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)