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Abstract:

Chasmagnathus granulatus Dana, 1851 is an intertidal estuarine crab that experiences acute salinity changes ranging from < 1‰ to full-strength seawater and even hypersaline waters in tide pools concentrated by evaporation. Ultrastructural changes induced by salinity in the posterior gills were examined in crabs collected from the Rio de la Plata estuary Argentina during March 1999. The posterior gills of C. granulatus are involved both in ion uptake and ion secretion depending on the acclimation medium. These organs are mostly lined with a thick tissue, which presents the characteristics of a typical salt-transporting epithelium. Electron microscopy analysis of gill tissue from crabs acclimated to dilute, full, and concentrated seawater (12‰, 34‰, and 45‰ salinity) showed significant development of basolateral membrane interdigitations, with numerous mitochondria and conspicuous apical membrane infoldings. Morphometrical analysis indicated that the subcuticular space delimited by the infolding of the apical membrane was significantly increased in the gills of high-salinity acclimated crabs. Septate junctions, which are thought to define the paracellular permeability, were significantly shorter in high-salinity acclimated crabs, suggesting a possible role of the paracellular pathway in salt secretion.

Registro:

Documento: Artículo
Título:Ultrastructural changes in the gill epithelium of the crab Chasmagnathus granulatus (Decapoda: Grapsidae) in diluted and concentrated seawater
Autor:Luquet, C.M.; Genovese, G.; Rosa, G.A.; Pellerano, G.N.
Filiación:Departamento de Ciencias Biologicas, Universidad de Buenos Aires, Pabellón II Cd. Universitaria, C1428EHA Buenos Aires, Argentina
Palabras clave:crab; salinity; ultrastructure; Chasmagnathus granulata; Decapoda (Crustacea); Grapsidae
Año:2002
Volumen:141
Número:4
Página de inicio:753
Página de fin:760
DOI: http://dx.doi.org/10.1007/s00227-002-0860-3
Título revista:Marine Biology
Título revista abreviado:Mar. Biol.
ISSN:00253162
CODEN:MBIOA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00253162_v141_n4_p753_Luquet

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Citas:

---------- APA ----------
Luquet, C.M., Genovese, G., Rosa, G.A. & Pellerano, G.N. (2002) . Ultrastructural changes in the gill epithelium of the crab Chasmagnathus granulatus (Decapoda: Grapsidae) in diluted and concentrated seawater. Marine Biology, 141(4), 753-760.
http://dx.doi.org/10.1007/s00227-002-0860-3
---------- CHICAGO ----------
Luquet, C.M., Genovese, G., Rosa, G.A., Pellerano, G.N. "Ultrastructural changes in the gill epithelium of the crab Chasmagnathus granulatus (Decapoda: Grapsidae) in diluted and concentrated seawater" . Marine Biology 141, no. 4 (2002) : 753-760.
http://dx.doi.org/10.1007/s00227-002-0860-3
---------- MLA ----------
Luquet, C.M., Genovese, G., Rosa, G.A., Pellerano, G.N. "Ultrastructural changes in the gill epithelium of the crab Chasmagnathus granulatus (Decapoda: Grapsidae) in diluted and concentrated seawater" . Marine Biology, vol. 141, no. 4, 2002, pp. 753-760.
http://dx.doi.org/10.1007/s00227-002-0860-3
---------- VANCOUVER ----------
Luquet, C.M., Genovese, G., Rosa, G.A., Pellerano, G.N. Ultrastructural changes in the gill epithelium of the crab Chasmagnathus granulatus (Decapoda: Grapsidae) in diluted and concentrated seawater. Mar. Biol. 2002;141(4):753-760.
http://dx.doi.org/10.1007/s00227-002-0860-3