Your browser doesn't support javascript.
loading
Structure of the testis and spermatogenesis of the viviparous teleost Poecilia mexicana (Poeciliidae) from an active sulfur spring cave in Southern Mexico.
Torres-Martínez, Aarón; Ruiz de Dios, Liliana; Hernández-Franyutti, Arlette; Uribe, Mari Carmen; Sánchez, Wilfrido Contreras.
Afiliação
  • Torres-Martínez A; Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco, Tabasco, Mexico.
  • Ruiz de Dios L; Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan.
  • Hernández-Franyutti A; Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco, Tabasco, Mexico.
  • Uribe MC; Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco, Tabasco, Mexico.
  • Sánchez WC; Facultad de Ciencias, Laboratorio de Biología de la Reproducción Animal, Departamento de Biología Comparada, Universidad Nacional Autónoma de México, Ciudad de México, Mexico.
J Morphol ; 280(10): 1537-1547, 2019 10.
Article em En | MEDLINE | ID: mdl-31343766
We describe the histological characteristics of the testis and spermatogenesis of the cave molly Poecilia mexicana, a viviparous teleost inhabiting a sulfur spring cave, Cueva del Azufre, in Tabasco, Southern Mexico. P. mexicana has elongate spermatogonial restricted testes with spermatogonia arranged in the testicular periphery. Germ cell development occurs within spermatocysts. As spermatogenesis proceeds, the spermatocysts move longitudinally from the periphery of the testis to the efferent duct system, where mature spermatozoa are released. The efferent duct system consists of short efferent duct branches connected to a main efferent duct, opened into the genital pore. Spermatogenesis consisted of the following stages: spermatogonia (A and B), spermatocytes (primary and secondary), spermatids, and spermatozoa. The spermatozoa are situated within spermatocysts, with their heads oriented toward the periphery and flagella toward the center. Once in the efferent duct system, mature spermatozoa are packaged as unencapsulated sperm bundles, that is, spermatozeugmata. We suggest that the histological characteristics of the testis and spermatogenesis of P. mexicana from the Cueva del Azufre, and the viviparous condition where the spermatozoa enter in the female without been in the water, have allowed them to invade sulfurous and/or subterranean environments in Southern Mexico, without requiring complex morphofunctional changes in the testis or the spermatogenetic process.
Assuntos
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Espermatogênese / Testículo / Poecilia Limite: Animals País/Região como assunto: Mexico Idioma: En Revista: J Morphol Ano de publicação: 2019 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Espermatogênese / Testículo / Poecilia Limite: Animals País/Região como assunto: Mexico Idioma: En Revista: J Morphol Ano de publicação: 2019 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos