2024-03-29T13:43:00Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/283112019-02-20T10:18:52Zcom_10261_14com_10261_8col_10261_267
2010-10-08T08:54:01Z
urn:hdl:10261/28311
Oogenesis in the amberjack Seriola dumerili Risso, 1810. An histological, histochemical and ultrastructural study of oocyte development
Grau, Amàlia
Crespo, Silvia
Riera, Francisco
Pou, Sebastián
Sarasquete, Carmen
Ovary
Histology
Histochemistry
Ultrastructure
Reproduction
Fishes
Histología
Histoquímica
Ultraestructura
Reproducción
Ovario
Peces
16 páginas, 7 figuras, 1 tabla.
[EN] Macroscopic and microscopic characteristics of the maturity stages of the ovary of the amberjack Seriola dumerili. Risso are reported. Oogonia, oocytes at different stages of development, follicular and thecal cells, and postovulatory follicles are described following a light and transmission electron microscope study. Histological observations of oocyte development show that the oocyte diameter increases about 100-fold during oogenesis, the nucleus-to-cytoplasm- ratio ranging from 72% (in oogonia) to 18% (in mature oocytes just before the breakdown of the germinal vesicle). Histochemical and ultrastructural studies show that three types of inclusions are formed during vitellogenesis. Lipid globules (exclusively composed of neutral lipids) appear first (at the end of the perinucleolar stage) followed by cortical alveoli (exclusively composed of carbohydrates). Yolk granules, which contain glycoproteins, glycogen and lipids appear last. The location and movements of these inclusions within the oocyte cytoplasm during oogenesis are described. The vitelline envelope or zona radiata (ZR) is first seen at the lipid globule stage I as a discontinous layer. This structure. mainly proteinaceous in nature, increases in thickness as oogenesis proceeds and peaks (33 pm) during the maturation phase.
[ES] Se describen las características macroscópicas y microscópicas de los estados de maduración
ovárica del pez limón. Seriola dumerili Risso, 1810. Las ovogonias, los ovocitos en diferentes estados de desarrollo, las células foliculares y tecales, y los folículos postovulatorios son descritos mediante su observación al microscopio
óptico y al microscopio electrónico de transmisión. El diamietro ovocitario aumenta aproximadamente 100 veces
durante la ovogénesis, pasando la relación núcleo-citoplasmia del 72% (en las ovogonias) al 18% (en los ovocitos maduros
anteriores a la desaparición de la vesícula germinal).
2010-10-08T08:54:01Z
2010-10-08T08:54:01Z
1996
artículo
Scientia Marina 60(2-3): 391-406 (1996)
0214-8358
http://hdl.handle.net/10261/28311
1886-8134
eng
http://www.icm.csic.es/scimar/index.php/secId/6/IdArt/2797/
openAccess
Consejo Superior de Investigaciones Científicas (España)