Histopathological effects of cadmium on the gills of the freshwater fish, Macropsobrycon uruguayanae Eigenmann (Pisces, Atherinidae)

Evaluations of histopathological lesions in gill tissue were carried out in the freshwater fish Macropsobrycon uruguayanae following 30 and 60 days of exposure to 1.5 mg l-1 of cadmium. The study was conducted on both fed and starved animals in order to determine the influence of feeding condition o...

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Autores principales: Randi, A.S., Monserrat, J.M., Rodriguez, E.M., Romano, L.A.
Formato: JOUR
Materias:
Animalia
Atherinidae
Macropsobrycon
Macropsobrycon uruguayanae
Pisces
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01407775_v19_n4_p311_Randi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_01407775_v19_n4_p311_Randi2023-10-03T14:58:24Z Histopathological effects of cadmium on the gills of the freshwater fish, Macropsobrycon uruguayanae Eigenmann (Pisces, Atherinidae) Randi, A.S. Monserrat, J.M. Rodriguez, E.M. Romano, L.A. Animalia Atherinidae Macropsobrycon Macropsobrycon uruguayanae Macropsobrycon uruguayanae Pisces Evaluations of histopathological lesions in gill tissue were carried out in the freshwater fish Macropsobrycon uruguayanae following 30 and 60 days of exposure to 1.5 mg l-1 of cadmium. The study was conducted on both fed and starved animals in order to determine the influence of feeding condition on cadmium toxicity. The main lesions observed and quantified were: (1) hyperplasia of primary lamellar epithelium; (2) hyperplasia of secondary lamellar epithelium; (3) separation of respiratory epithelium; (4) shortening of secondary lamellae; (5) epithelial necrosis; (6) fusion of adjacent secondary lamellae; (7) hypertrophy of respiratory epithelium; (8) lamellar telangiectasis; (9) hyperplasia of chloride cells; (10) mucinous metaplasia; and (11) inflammatory infiltration. Lesions 6, 8, 9 and 11 were only induced by exposure to cadmium, while lesion 4 could be produced only by starvation. Starved fish also showed a reduction in total body weight and length. Lesion 2 was shown to be non-specific, and produced by either cadmium, starvation or even exposure time. The possible mode of action of the experimental factors are discussed in relation to the observed pathologies. Fil:Randi, A.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Monserrat, J.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rodriguez, E.M. 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_01407775_v19_n4_p311_Randi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Animalia
Atherinidae
Macropsobrycon
Macropsobrycon uruguayanae
Macropsobrycon uruguayanae
Pisces
spellingShingle Animalia
Atherinidae
Macropsobrycon
Macropsobrycon uruguayanae
Macropsobrycon uruguayanae
Pisces
Randi, A.S.
Monserrat, J.M.
Rodriguez, E.M.
Romano, L.A.
Histopathological effects of cadmium on the gills of the freshwater fish, Macropsobrycon uruguayanae Eigenmann (Pisces, Atherinidae)
topic_facet Animalia
Atherinidae
Macropsobrycon
Macropsobrycon uruguayanae
Macropsobrycon uruguayanae
Pisces
description Evaluations of histopathological lesions in gill tissue were carried out in the freshwater fish Macropsobrycon uruguayanae following 30 and 60 days of exposure to 1.5 mg l-1 of cadmium. The study was conducted on both fed and starved animals in order to determine the influence of feeding condition on cadmium toxicity. The main lesions observed and quantified were: (1) hyperplasia of primary lamellar epithelium; (2) hyperplasia of secondary lamellar epithelium; (3) separation of respiratory epithelium; (4) shortening of secondary lamellae; (5) epithelial necrosis; (6) fusion of adjacent secondary lamellae; (7) hypertrophy of respiratory epithelium; (8) lamellar telangiectasis; (9) hyperplasia of chloride cells; (10) mucinous metaplasia; and (11) inflammatory infiltration. Lesions 6, 8, 9 and 11 were only induced by exposure to cadmium, while lesion 4 could be produced only by starvation. Starved fish also showed a reduction in total body weight and length. Lesion 2 was shown to be non-specific, and produced by either cadmium, starvation or even exposure time. The possible mode of action of the experimental factors are discussed in relation to the observed pathologies.
format JOUR
author Randi, A.S.
Monserrat, J.M.
Rodriguez, E.M.
Romano, L.A.
author_facet Randi, A.S.
Monserrat, J.M.
Rodriguez, E.M.
Romano, L.A.
author_sort Randi, A.S.
title Histopathological effects of cadmium on the gills of the freshwater fish, Macropsobrycon uruguayanae Eigenmann (Pisces, Atherinidae)
title_short Histopathological effects of cadmium on the gills of the freshwater fish, Macropsobrycon uruguayanae Eigenmann (Pisces, Atherinidae)
title_full Histopathological effects of cadmium on the gills of the freshwater fish, Macropsobrycon uruguayanae Eigenmann (Pisces, Atherinidae)
title_fullStr Histopathological effects of cadmium on the gills of the freshwater fish, Macropsobrycon uruguayanae Eigenmann (Pisces, Atherinidae)
title_full_unstemmed Histopathological effects of cadmium on the gills of the freshwater fish, Macropsobrycon uruguayanae Eigenmann (Pisces, Atherinidae)
title_sort histopathological effects of cadmium on the gills of the freshwater fish, macropsobrycon uruguayanae eigenmann (pisces, atherinidae)
url http://hdl.handle.net/20.500.12110/paper_01407775_v19_n4_p311_Randi
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AT monserratjm histopathologicaleffectsofcadmiumonthegillsofthefreshwaterfishmacropsobryconuruguayanaeeigenmannpiscesatherinidae
AT rodriguezem histopathologicaleffectsofcadmiumonthegillsofthefreshwaterfishmacropsobryconuruguayanaeeigenmannpiscesatherinidae
AT romanola histopathologicaleffectsofcadmiumonthegillsofthefreshwaterfishmacropsobryconuruguayanaeeigenmannpiscesatherinidae
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