Effects of paraquat on mortality and cardiorespiratory function of catfish fry Plecostomus commersoni

The effects of a paraquat commercial herbicide formulation on an early stage of the development of Plecostomus commersoni were evaluated. Mortality, opercular ventilation rate, cardiac contraction rate and body length and weight were examined every 12 hr. The effects of the paraquat formulation on t...

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Autor principal:	Hernández, Domingo A.
Publicado:	1990
Materias:	paraquat animal experiment article fish heart function histology lc 50 mortality nonhuman priority journal respiratory system toxicity Animals Argentina Catfishes Female Hemodynamic Processes Oxygen Consumption Paraquat Animalia Plecostomus
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00904341_v19_n4_p523_Tortorelli http://hdl.handle.net/20.500.12110/paper_00904341_v19_n4_p523_Tortorelli
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00904341_v19_n4_p523_Tortorelli
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spelling	paper:paper_00904341_v19_n4_p523_Tortorelli2023-06-08T15:07:44Z Effects of paraquat on mortality and cardiorespiratory function of catfish fry Plecostomus commersoni Hernández, Domingo A. paraquat animal experiment article fish heart function histology lc 50 mortality nonhuman priority journal respiratory system toxicity Animals Argentina Catfishes Female Hemodynamic Processes Oxygen Consumption Paraquat Animalia Plecostomus The effects of a paraquat commercial herbicide formulation on an early stage of the development of Plecostomus commersoni were evaluated. Mortality, opercular ventilation rate, cardiac contraction rate and body length and weight were examined every 12 hr. The effects of the paraquat formulation on the morphology of the branchial epithelium were also examined by light microscopy. The assayed paraquat formulation significantly affected cardiac contraction and opercular ventilation. Ecotoxicologically, this could represent an important deleterious effect for early development of the catfish. Mortality data may not be sufficient for an appropriate evaluation of secondary environmental hazards associated with the application of paraquat formulation because: a) The LC-50 values for Plecostomus commersoni fry were higher than the recommended individual application rate of paraquat for aquatic weed control (0.1-2.0 mg/L). b) The estimated maximum acceptable toxicant concentration (MATC) resulted in a concentration similar to the application rate when calculated from acute toxicity tests. When the MATC was estimated from opercular ventilation or cardiac contraction rates, it was lower and fell within the recommended single application rate. © 1990 Springer-Verlag New York Inc. Fil:Hernández, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1990 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00904341_v19_n4_p523_Tortorelli http://hdl.handle.net/20.500.12110/paper_00904341_v19_n4_p523_Tortorelli
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	paraquat animal experiment article fish heart function histology lc 50 mortality nonhuman priority journal respiratory system toxicity Animals Argentina Catfishes Female Hemodynamic Processes Oxygen Consumption Paraquat Animalia Plecostomus
spellingShingle	paraquat animal experiment article fish heart function histology lc 50 mortality nonhuman priority journal respiratory system toxicity Animals Argentina Catfishes Female Hemodynamic Processes Oxygen Consumption Paraquat Animalia Plecostomus Hernández, Domingo A. Effects of paraquat on mortality and cardiorespiratory function of catfish fry Plecostomus commersoni
topic_facet	paraquat animal experiment article fish heart function histology lc 50 mortality nonhuman priority journal respiratory system toxicity Animals Argentina Catfishes Female Hemodynamic Processes Oxygen Consumption Paraquat Animalia Plecostomus
description	The effects of a paraquat commercial herbicide formulation on an early stage of the development of Plecostomus commersoni were evaluated. Mortality, opercular ventilation rate, cardiac contraction rate and body length and weight were examined every 12 hr. The effects of the paraquat formulation on the morphology of the branchial epithelium were also examined by light microscopy. The assayed paraquat formulation significantly affected cardiac contraction and opercular ventilation. Ecotoxicologically, this could represent an important deleterious effect for early development of the catfish. Mortality data may not be sufficient for an appropriate evaluation of secondary environmental hazards associated with the application of paraquat formulation because: a) The LC-50 values for Plecostomus commersoni fry were higher than the recommended individual application rate of paraquat for aquatic weed control (0.1-2.0 mg/L). b) The estimated maximum acceptable toxicant concentration (MATC) resulted in a concentration similar to the application rate when calculated from acute toxicity tests. When the MATC was estimated from opercular ventilation or cardiac contraction rates, it was lower and fell within the recommended single application rate. © 1990 Springer-Verlag New York Inc.
author	Hernández, Domingo A.
author_facet	Hernández, Domingo A.
author_sort	Hernández, Domingo A.
title	Effects of paraquat on mortality and cardiorespiratory function of catfish fry Plecostomus commersoni
title_short	Effects of paraquat on mortality and cardiorespiratory function of catfish fry Plecostomus commersoni
title_full	Effects of paraquat on mortality and cardiorespiratory function of catfish fry Plecostomus commersoni
title_fullStr	Effects of paraquat on mortality and cardiorespiratory function of catfish fry Plecostomus commersoni
title_full_unstemmed	Effects of paraquat on mortality and cardiorespiratory function of catfish fry Plecostomus commersoni
title_sort	effects of paraquat on mortality and cardiorespiratory function of catfish fry plecostomus commersoni
publishDate	1990
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00904341_v19_n4_p523_Tortorelli http://hdl.handle.net/20.500.12110/paper_00904341_v19_n4_p523_Tortorelli
work_keys_str_mv	AT hernandezdomingoa effectsofparaquatonmortalityandcardiorespiratoryfunctionofcatfishfryplecostomuscommersoni
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Effects of paraquat on mortality and cardiorespiratory function of catfish fry Plecostomus commersoni

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