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Abstract:

Zidona dufresnei is a carnivorous snail that plays an important role in the trophic web as a top predator. It is a threatened species due to high levels of fisheries exploitation. In this study, we describe the morphology of the digestive gland of Z. dufresnei from Mar del Plata, Argentina, and discuss the function and the cycle of activity of the different cell types. Histological analysis reveals two types of tubules: type 1 tubules composed of digestive and basophilic cells and type 2 tubules lined by basophilic cells only. Pyramidal basophilic cells contain lipofuscin and a large amount of rough endoplasmic reticulum, which suggests that these cells are responsible for the secretion of digestive enzymes that initiate the extracellular digestion of the food. Columnar digestive cells exhibit large membrane-bound vesicles that contain proteoglycans, neutral glycosaminoglycans and small amounts of lipid and lipofuscin. The presence in digestive cells of many endocytic vesicles and residual lysosomal bodies, as evidenced by the presence of lipofuscin pigments in the apical region, indicate that digestion is completed intracellularly within these cells. The digestive cells are subject to cyclical changes involving four phases: initial, digestion, fragmentation, and disintegration stages.

Registro:

Documento: Artículo
Título:Morphology and cyclic activity of the digestive gland of zidona dufresnei (caenogastropoda: Volutidae)
Autor:Ojeda, M.; Arrighetti, F.; Giménez, J.
Filiación:Biología de Invertebrados Marinos, Departamento de Biodiversidad y Biología Experimental. FCEyN, Universidad de Buenos Aires, Buenos Aires, C1428EGA, Argentina
Malacología y Ecosistemas Costeros, Museo Argentino de Ciencias Naturales, CONICET, Buenos Aires, Argentina
IBBEA, CONICET-UBA, Buenos Aires, Argentina
Palabras clave:basophilic cells; carnivorous snail; digestive cells; Gastropoda; South Atlantic Ocean; Caenogastropoda; Gastropoda; Volutidae
Año:2015
Volumen:58
Número:1-2
Página de inicio:157
Página de fin:165
DOI: http://dx.doi.org/10.4002/040.058.0204
Título revista:Malacologia
Título revista abreviado:Malacologia
ISSN:00762997
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00762997_v58_n1-2_p157_Ojeda

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Citas:

---------- APA ----------
Ojeda, M., Arrighetti, F. & Giménez, J. (2015) . Morphology and cyclic activity of the digestive gland of zidona dufresnei (caenogastropoda: Volutidae). Malacologia, 58(1-2), 157-165.
http://dx.doi.org/10.4002/040.058.0204
---------- CHICAGO ----------
Ojeda, M., Arrighetti, F., Giménez, J. "Morphology and cyclic activity of the digestive gland of zidona dufresnei (caenogastropoda: Volutidae)" . Malacologia 58, no. 1-2 (2015) : 157-165.
http://dx.doi.org/10.4002/040.058.0204
---------- MLA ----------
Ojeda, M., Arrighetti, F., Giménez, J. "Morphology and cyclic activity of the digestive gland of zidona dufresnei (caenogastropoda: Volutidae)" . Malacologia, vol. 58, no. 1-2, 2015, pp. 157-165.
http://dx.doi.org/10.4002/040.058.0204
---------- VANCOUVER ----------
Ojeda, M., Arrighetti, F., Giménez, J. Morphology and cyclic activity of the digestive gland of zidona dufresnei (caenogastropoda: Volutidae). Malacologia. 2015;58(1-2):157-165.
http://dx.doi.org/10.4002/040.058.0204