Histological Description of the Male and Female Gonads in Tegula eiseni, T. funebralis, T. aureotincta, T. gallina and T. regina from Bahia Tortugas, B.C.S., Mexico

Some of the gastropods of the Baja California peninsula are of commercial value, but the majority are not. Among the less commercially valuable species are members of the genus Tegula, which are ecologically important because of their abundance and the trophic level they occupy. Mature specimens of...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Ortíz-Ordoñez,Esperanza, Mendoza-Santana,Elizabeth L, Belmar-Pérez,Jorge, Padilla-Benavides,Teresita del Niño Jesús
Lenguaje:English
Publicado: Sociedad Chilena de Anatomía 2009
Materias:
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300011
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:scielo:S0717-95022009000300011
record_format dspace
spelling oai:scielo:S0717-950220090003000112010-04-05Histological Description of the Male and Female Gonads in Tegula eiseni, T. funebralis, T. aureotincta, T. gallina and T. regina from Bahia Tortugas, B.C.S., MexicoOrtíz-Ordoñez,EsperanzaMendoza-Santana,Elizabeth LBelmar-Pérez,JorgePadilla-Benavides,Teresita del Niño Jesús Gonadic histology Baja California Tegula Some of the gastropods of the Baja California peninsula are of commercial value, but the majority are not. Among the less commercially valuable species are members of the genus Tegula, which are ecologically important because of their abundance and the trophic level they occupy. Mature specimens of T. eiseni, T. funebralis, T. aureotincta, T. gallina, and T. regina were collected from two rocky reefs close to Bahía Tortugas, B.C.S. and were processed using a paraffin-embedding technique. All of these species are dioecious, without external sexual dimorphism; in adults, the female gonads are green moss colored while male gonads are cream colored. The gonadal tissue is limited externally by a single ciliated cylindrical epithelium with plentiful granular glandular cells and is located on a connective tissue and muscular fiber layer. This layer is invaginated towards the gonad core, creating radially distributed trabeculae where the germinal tissue is found. The size of the oogonia fluctuates between 10 and 30 µm, and that of the developing oocytes ranges between 30 and 140 µm. In this stage, the cells are pyriform with a peduncle linked to the trabeculae. Mature oocytes have an average size of 165 µm and present a well-defined chorion and a large quantity of vitelline platelets that occupy the whole cytoplasm. In the five species, the development in males is similar until the spermatid stage. In general, the average size of the spermatic cell nucleus is 2.5 µm, while the flagellum length varies from 35 to 45 µm. The species differ in the shape of the acrosome.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.27 n.3 20092009-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300011en10.4067/S0717-95022009000300011
institution Scielo Chile
collection Scielo Chile
language English
topic Gonadic histology
Baja California
Tegula
spellingShingle Gonadic histology
Baja California
Tegula
Ortíz-Ordoñez,Esperanza
Mendoza-Santana,Elizabeth L
Belmar-Pérez,Jorge
Padilla-Benavides,Teresita del Niño Jesús
Histological Description of the Male and Female Gonads in Tegula eiseni, T. funebralis, T. aureotincta, T. gallina and T. regina from Bahia Tortugas, B.C.S., Mexico
description Some of the gastropods of the Baja California peninsula are of commercial value, but the majority are not. Among the less commercially valuable species are members of the genus Tegula, which are ecologically important because of their abundance and the trophic level they occupy. Mature specimens of T. eiseni, T. funebralis, T. aureotincta, T. gallina, and T. regina were collected from two rocky reefs close to Bahía Tortugas, B.C.S. and were processed using a paraffin-embedding technique. All of these species are dioecious, without external sexual dimorphism; in adults, the female gonads are green moss colored while male gonads are cream colored. The gonadal tissue is limited externally by a single ciliated cylindrical epithelium with plentiful granular glandular cells and is located on a connective tissue and muscular fiber layer. This layer is invaginated towards the gonad core, creating radially distributed trabeculae where the germinal tissue is found. The size of the oogonia fluctuates between 10 and 30 µm, and that of the developing oocytes ranges between 30 and 140 µm. In this stage, the cells are pyriform with a peduncle linked to the trabeculae. Mature oocytes have an average size of 165 µm and present a well-defined chorion and a large quantity of vitelline platelets that occupy the whole cytoplasm. In the five species, the development in males is similar until the spermatid stage. In general, the average size of the spermatic cell nucleus is 2.5 µm, while the flagellum length varies from 35 to 45 µm. The species differ in the shape of the acrosome.
author Ortíz-Ordoñez,Esperanza
Mendoza-Santana,Elizabeth L
Belmar-Pérez,Jorge
Padilla-Benavides,Teresita del Niño Jesús
author_facet Ortíz-Ordoñez,Esperanza
Mendoza-Santana,Elizabeth L
Belmar-Pérez,Jorge
Padilla-Benavides,Teresita del Niño Jesús
author_sort Ortíz-Ordoñez,Esperanza
title Histological Description of the Male and Female Gonads in Tegula eiseni, T. funebralis, T. aureotincta, T. gallina and T. regina from Bahia Tortugas, B.C.S., Mexico
title_short Histological Description of the Male and Female Gonads in Tegula eiseni, T. funebralis, T. aureotincta, T. gallina and T. regina from Bahia Tortugas, B.C.S., Mexico
title_full Histological Description of the Male and Female Gonads in Tegula eiseni, T. funebralis, T. aureotincta, T. gallina and T. regina from Bahia Tortugas, B.C.S., Mexico
title_fullStr Histological Description of the Male and Female Gonads in Tegula eiseni, T. funebralis, T. aureotincta, T. gallina and T. regina from Bahia Tortugas, B.C.S., Mexico
title_full_unstemmed Histological Description of the Male and Female Gonads in Tegula eiseni, T. funebralis, T. aureotincta, T. gallina and T. regina from Bahia Tortugas, B.C.S., Mexico
title_sort histological description of the male and female gonads in tegula eiseni, t. funebralis, t. aureotincta, t. gallina and t. regina from bahia tortugas, b.c.s., mexico
publisher Sociedad Chilena de Anatomía
publishDate 2009
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300011
work_keys_str_mv AT ortizordonezesperanza histologicaldescriptionofthemaleandfemalegonadsintegulaeisenitfunebralistaureotinctatgallinaandtreginafrombahiatortugasbcsmexico
AT mendozasantanaelizabethl histologicaldescriptionofthemaleandfemalegonadsintegulaeisenitfunebralistaureotinctatgallinaandtreginafrombahiatortugasbcsmexico
AT belmarperezjorge histologicaldescriptionofthemaleandfemalegonadsintegulaeisenitfunebralistaureotinctatgallinaandtreginafrombahiatortugasbcsmexico
AT padillabenavidesteresitadelninojesus histologicaldescriptionofthemaleandfemalegonadsintegulaeisenitfunebralistaureotinctatgallinaandtreginafrombahiatortugasbcsmexico
_version_ 1718444662112387072