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Abstract:

Histological and morphometric analyses were performed on the gills of the semiterrestrial estuarine crab Chasmagnathus granulatus. Three different epithelia were recognized: (1) A thin epithelium, 2.42 ± 0.33 μm thick, which lines the whole lamellae in the three anterior gills and was assigned to respiratory functions. (2) A thick cuboidal epithelium, 6-12.5 μm thick, covering part of gills 4 and 5 and the better part of the three most posterior gills. This tissue seems to be involved in ion-regulation, since it is located in the same zones which are darkly stained with silver nitrate and possess large numbers of mitochondria, closely associated to basolateral interdigitations and abundant infoldings of the apical membrane. (3) An attenuated epithelium, 0.5-1.5 μm thick, bordering the marginal channels of all the gills. This tissue is clearly of a respiratory type and probably plays an important role during air breathing when the branchial water stores become reduced by evaporation, and the consequent gill collapse impairs both ventilation and perfusion of the central part of the lamellae. During exposure to humid air, C. granulatus is able to maintain its branchial chambers almost completely filled with water, thus keeping its gills functional in spite of little mechanical support. These adaptations for maintaining gill respiration in air allow C. granulatus to sustain high metabolic rates during emergence, with little increase in venous partial pressure of carbon dioxide.

Registro:

Documento: Artículo
Título:Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits
Autor:Luquet, C.M.; Rosa, G.A.; Ferrari, C.C.; Genovese, G.; Pellerano, G.N.
Filiación:Depto. de Ciencias Biológicas, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:crustacean; intertidal environment; morphology; respiration; Chasmagnathus granulata; Chasmagnathus granulatus; Crustacea; Decapoda (Crustacea); Grapsidae
Año:2000
Volumen:73
Número:1
Página de inicio:53
Página de fin:67
DOI: http://dx.doi.org/10.1163/156854000504110
Título revista:Crustaceana
Título revista abreviado:Crustaceana
ISSN:0011216X
CODEN:CRUSA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0011216X_v73_n1_p53_Luquet

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Citas:

---------- APA ----------
Luquet, C.M., Rosa, G.A., Ferrari, C.C., Genovese, G. & Pellerano, G.N. (2000) . Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits. Crustaceana, 73(1), 53-67.
http://dx.doi.org/10.1163/156854000504110
---------- CHICAGO ----------
Luquet, C.M., Rosa, G.A., Ferrari, C.C., Genovese, G., Pellerano, G.N. "Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits" . Crustaceana 73, no. 1 (2000) : 53-67.
http://dx.doi.org/10.1163/156854000504110
---------- MLA ----------
Luquet, C.M., Rosa, G.A., Ferrari, C.C., Genovese, G., Pellerano, G.N. "Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits" . Crustaceana, vol. 73, no. 1, 2000, pp. 53-67.
http://dx.doi.org/10.1163/156854000504110
---------- VANCOUVER ----------
Luquet, C.M., Rosa, G.A., Ferrari, C.C., Genovese, G., Pellerano, G.N. Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits. Crustaceana. 2000;73(1):53-67.
http://dx.doi.org/10.1163/156854000504110