Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits

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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 re...

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Autores principales: Luquet, C.M., Rosa, G.A., Ferrari, C.C., Genovese, G., Pellerano, G.N.
Formato: JOUR
Materias:
crustacean
intertidal environment
morphology
respiration
Chasmagnathus granulata
Chasmagnathus granulatus
Crustacea
Decapoda (Crustacea)
Grapsidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0011216X_v73_n1_p53_Luquet
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0011216X_v73_n1_p53_Luquet
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spelling todo:paper_0011216X_v73_n1_p53_Luquet2023-10-03T14:09:37Z Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits Luquet, C.M. Rosa, G.A. Ferrari, C.C. Genovese, G. Pellerano, G.N. crustacean intertidal environment morphology respiration Chasmagnathus granulata Chasmagnathus granulatus Crustacea Decapoda (Crustacea) Grapsidae 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. Fil:Luquet, C.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ferrari, C.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Genovese, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pellerano, G.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0011216X_v73_n1_p53_Luquet
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic crustacean
intertidal environment
morphology
respiration
Chasmagnathus granulata
Chasmagnathus granulatus
Crustacea
Decapoda (Crustacea)
Grapsidae
spellingShingle crustacean
intertidal environment
morphology
respiration
Chasmagnathus granulata
Chasmagnathus granulatus
Crustacea
Decapoda (Crustacea)
Grapsidae
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
topic_facet crustacean
intertidal environment
morphology
respiration
Chasmagnathus granulata
Chasmagnathus granulatus
Crustacea
Decapoda (Crustacea)
Grapsidae
description 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.
format JOUR
author Luquet, C.M.
Rosa, G.A.
Ferrari, C.C.
Genovese, G.
Pellerano, G.N.
author_facet Luquet, C.M.
Rosa, G.A.
Ferrari, C.C.
Genovese, G.
Pellerano, G.N.
author_sort Luquet, C.M.
title Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits
title_short Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits
title_full Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits
title_fullStr Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits
title_full_unstemmed Gill morphology of the intertidal estuarine crab Chasmagnathus granulatus Dana, 1851 (Decapoda, Grapsidae) in relation to habitat and respiratory habits
title_sort gill morphology of the intertidal estuarine crab chasmagnathus granulatus dana, 1851 (decapoda, grapsidae) in relation to habitat and respiratory habits
url http://hdl.handle.net/20.500.12110/paper_0011216X_v73_n1_p53_Luquet
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