Artigo

Acute toxicity of cassava residues in Hyphossobrycon eques Steindachner (1982)

Detoxification of Cassava is a fundamental process for processing the roots into by-products, but this process occurs stocking roots in water. However, its toxicity released into aquatic environment still is unknown. For this reason, this study evaluated the acute toxicity of effluent with cassava r...

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Autor principal: ALONSO, Paulo Arthur de Jesus
Grau: Artigo
Publicado em: 2023
Assuntos:
Toxicity
Hydrocyanic acid
Cassava
CNPQ::CIENCIAS AGRARIAS::RECURSOS PESQUEIROS E ENGENHARIA DE PESCA
Acesso em linha: https://bdm.ufpa.br:8443/jspui/handle/prefix/5738
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spelling oai:https:--bdm.ufpa.br:8443:prefix-57382023-05-18T03:07:21Z Acute toxicity of cassava residues in Hyphossobrycon eques Steindachner (1982) ALONSO, Paulo Arthur de Jesus CAMPELO, Daniel Abreu Vasconcelos http://lattes.cnpq.br/2787760801666473 https://orcid.org/0000-0001-9204-3566 Toxicity Hydrocyanic acid Cassava CNPQ::CIENCIAS AGRARIAS::RECURSOS PESQUEIROS E ENGENHARIA DE PESCA Detoxification of Cassava is a fundamental process for processing the roots into by-products, but this process occurs stocking roots in water. However, its toxicity released into aquatic environment still is unknown. For this reason, this study evaluated the acute toxicity of effluent with cassava root residue on the fish Hyphossobrycon eques. Therefore, sensitivity tests were performed with five concentrations of KCl (0.4; 0.9; 1.4; 1.9; and 2.4 g.L-1) and acute toxicity test (LC50-96h) with eight effluent concentrations with cassava root residue (0; 3.8; 4.7; 5.7; 6.6; 7.6; 8.5 and 9.5 mg.L-1), and four replicates. During the toxicity test, behavioral changes and mortality rate were observed. The estimated sensitivity for H. eques was 1.12 g.L-1, and the lethal concentration at 50% (LC50-96h) of the effluent with cassava root residue was 6.2 mg.L-1, classified as moderately toxic xenobiotic. During the experimental period, 100% mortality was observed at the highest concentration (9.5 mg.L-1) and behavioral changes such as agitation, erratic swimming and increased opercular beating of fish exposed to the xenobiotic. Therefore, the effluent with cassava root residue is a risk to the aquatic environment, causing changes in the behavior and mortality of H. eques. 2023-05-17T21:42:04Z 2023-05-17T21:42:04Z 2022-12-05 Trabalho de Conclusão de Curso - Graduação - Artigo ALONSO, Paulo Arthur de Jesus; et.al. Acute toxicity of cassava residues in Hyphossobrycon eques Steindachner (1982). Orientador: Daniel Abreu Vasconcelos Campelo. 2022. 7 f. Trabalho de Conclusão de Curso - Artigo (Bacharel em Engenharia de Pesca) – Faculdade de Engenharia de Pesca. Instituto de Estudos Costeiros, Campus Universitário de Bragança, Universidade Federal do Pará, Bragança-PA, 2022. Disponível em: https://bdm.ufpa.br:8443/jspui/handle/prefix/5738. Acesso em:. https://bdm.ufpa.br:8443/jspui/handle/prefix/5738 Acesso Aberto
institution Biblioteca Digital de Monografias - UFPA
collection MonografiaUFPA
topic Toxicity
Hydrocyanic acid
Cassava
CNPQ::CIENCIAS AGRARIAS::RECURSOS PESQUEIROS E ENGENHARIA DE PESCA
spellingShingle Toxicity
Hydrocyanic acid
Cassava
CNPQ::CIENCIAS AGRARIAS::RECURSOS PESQUEIROS E ENGENHARIA DE PESCA
ALONSO, Paulo Arthur de Jesus
Acute toxicity of cassava residues in Hyphossobrycon eques Steindachner (1982)
topic_facet Toxicity
Hydrocyanic acid
Cassava
CNPQ::CIENCIAS AGRARIAS::RECURSOS PESQUEIROS E ENGENHARIA DE PESCA
description Detoxification of Cassava is a fundamental process for processing the roots into by-products, but this process occurs stocking roots in water. However, its toxicity released into aquatic environment still is unknown. For this reason, this study evaluated the acute toxicity of effluent with cassava root residue on the fish Hyphossobrycon eques. Therefore, sensitivity tests were performed with five concentrations of KCl (0.4; 0.9; 1.4; 1.9; and 2.4 g.L-1) and acute toxicity test (LC50-96h) with eight effluent concentrations with cassava root residue (0; 3.8; 4.7; 5.7; 6.6; 7.6; 8.5 and 9.5 mg.L-1), and four replicates. During the toxicity test, behavioral changes and mortality rate were observed. The estimated sensitivity for H. eques was 1.12 g.L-1, and the lethal concentration at 50% (LC50-96h) of the effluent with cassava root residue was 6.2 mg.L-1, classified as moderately toxic xenobiotic. During the experimental period, 100% mortality was observed at the highest concentration (9.5 mg.L-1) and behavioral changes such as agitation, erratic swimming and increased opercular beating of fish exposed to the xenobiotic. Therefore, the effluent with cassava root residue is a risk to the aquatic environment, causing changes in the behavior and mortality of H. eques.
author_additional CAMPELO, Daniel Abreu Vasconcelos
author_additionalStr CAMPELO, Daniel Abreu Vasconcelos
format Artigo
author ALONSO, Paulo Arthur de Jesus
title Acute toxicity of cassava residues in Hyphossobrycon eques Steindachner (1982)
title_short Acute toxicity of cassava residues in Hyphossobrycon eques Steindachner (1982)
title_full Acute toxicity of cassava residues in Hyphossobrycon eques Steindachner (1982)
title_fullStr Acute toxicity of cassava residues in Hyphossobrycon eques Steindachner (1982)
title_full_unstemmed Acute toxicity of cassava residues in Hyphossobrycon eques Steindachner (1982)
title_sort acute toxicity of cassava residues in hyphossobrycon eques steindachner (1982)
publishDate 2023
url https://bdm.ufpa.br:8443/jspui/handle/prefix/5738
_version_ 1787155532297011200
score 11.753896

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