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- Title
Ultraestructura del Ovocito Maduro y en Reabsorción de Spondylus limbatus G. B. Sowerby II, 1847 (= S. calcifer) (Bivalvia: Spondylidae).
- Authors
Camacho-Mondragón, Marian Alejandra; Villalejo-Fuerte, Marcial; Ceballos-Vázquez, Bertha Patricia; López-Villegas, Edgar Oliver; Uría-Galicia, Esther; Vélez-Arellano, Nurenskaya; Arellano-Martínez, Marcial
- Abstract
Spondylus limbatus is a species under special protection in Mexico, of which there is little or no information in the literature of biological, histological or ultrastructural studies of the ovary. The objective of this research was to characterize the ultrastructural morphology of mature and degenerating female gametes. The female gonad of S. limbatus in mature state presented post-vitellogenic oocytes 60-70 mm in diameter, which have characteristics of metabolically active and highly synthesizing cells. The cytoplasmic membrane has specializations designed to increase the absorption surface of the cell, the microvilli; the cytoplasm presents numerous membranous systems related to synthesis of reserve and secretion material as well as the highly lobed nuclear organization pattern; a large surface that ensures core-cytoplasm exchange, is structurally incorporated into the vitellogenesis process. Finally, ultrastructural changes resulting from the lysis of the oocytes are described: collapse of nuclear and cytoplasmic membranes, and the presence of macrophage hemocytic cells.
- Subjects
MEXICO; CELL membranes; NUCLEAR membranes; MORPHOLOGY; LYSIS; GONADS; OVUM
- Publication
International Journal of Morphology, 2019, Vol 37, Issue 2, p694
- ISSN
0717-9367
- Publication type
Article
- DOI
10.4067/S0717-95022019000200694