Assessment of the risk of death of Clarias gariepinus and Oreochromis niloticus pulse-exposed to selected agricultural pesticides

Abstract Aquatic organisms are often exposed briefly to high pesticide concentration. Survival time model was used to study risk of death in C. gariepinus and O. niloticus fingerlings exposed to 24 mg/L atrazine, 42 mg/l mancozeb, 1 mg/L chlorpyrifos and 0.75 µg/L lambda cyhalothrin for 15, 30, 45 a...

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Autores principales:	Kingsley Chukwuemeka Kanu, Adebayo Akeem Otitoloju, Nnamdi Henry Amaeze
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/62a07f60b78246e9a8bb10c81963732e
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spelling	oai:doaj.org-article:62a07f60b78246e9a8bb10c81963732e2021-12-02T17:56:56ZAssessment of the risk of death of Clarias gariepinus and Oreochromis niloticus pulse-exposed to selected agricultural pesticides10.1038/s41598-021-94262-w2045-2322https://doaj.org/article/62a07f60b78246e9a8bb10c81963732e2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94262-whttps://doaj.org/toc/2045-2322Abstract Aquatic organisms are often exposed briefly to high pesticide concentration. Survival time model was used to study risk of death in C. gariepinus and O. niloticus fingerlings exposed to 24 mg/L atrazine, 42 mg/l mancozeb, 1 mg/L chlorpyrifos and 0.75 µg/L lambda cyhalothrin for 15, 30, 45 and 60 minutes and continuously for 96 hours. Mortality, time-to-death, weight, length, and condition factor of the fingerlings were recorded. Results obtained showed tilapia was more susceptible than catfish to continuous exposure but not pulse exposure. The survival probability of both species was similar when exposed for 15, 30 and 45 minutes (p > 0.05) but differed after 60 minutes (p < 0.05). Risk of death of catfish exposed briefly to atrazine, mancozeb and chlorpyrifos for 60 minutes was similar to 96 hours continuous exposure, same for tilapia exposed to 1 mg/L chlorpyrifos (p > 0.05). Survival probability of tilapia exposed to chlorpyrifos for 15, 30, 45 and 60 minutes was similar (p > 0.05) and was not influenced by pulse length. Pesticide hazard and risk of death decreased as fish size (weight, length, and condition factor) increased. Pulse toxicity assessment using survival models could make pesticides exposure assessment more realistic by studying factors that can influence the toxicity of pesticides.Kingsley Chukwuemeka KanuAdebayo Akeem OtitolojuNnamdi Henry AmaezeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kingsley Chukwuemeka Kanu Adebayo Akeem Otitoloju Nnamdi Henry Amaeze Assessment of the risk of death of Clarias gariepinus and Oreochromis niloticus pulse-exposed to selected agricultural pesticides
description	Abstract Aquatic organisms are often exposed briefly to high pesticide concentration. Survival time model was used to study risk of death in C. gariepinus and O. niloticus fingerlings exposed to 24 mg/L atrazine, 42 mg/l mancozeb, 1 mg/L chlorpyrifos and 0.75 µg/L lambda cyhalothrin for 15, 30, 45 and 60 minutes and continuously for 96 hours. Mortality, time-to-death, weight, length, and condition factor of the fingerlings were recorded. Results obtained showed tilapia was more susceptible than catfish to continuous exposure but not pulse exposure. The survival probability of both species was similar when exposed for 15, 30 and 45 minutes (p > 0.05) but differed after 60 minutes (p < 0.05). Risk of death of catfish exposed briefly to atrazine, mancozeb and chlorpyrifos for 60 minutes was similar to 96 hours continuous exposure, same for tilapia exposed to 1 mg/L chlorpyrifos (p > 0.05). Survival probability of tilapia exposed to chlorpyrifos for 15, 30, 45 and 60 minutes was similar (p > 0.05) and was not influenced by pulse length. Pesticide hazard and risk of death decreased as fish size (weight, length, and condition factor) increased. Pulse toxicity assessment using survival models could make pesticides exposure assessment more realistic by studying factors that can influence the toxicity of pesticides.
format	article
author	Kingsley Chukwuemeka Kanu Adebayo Akeem Otitoloju Nnamdi Henry Amaeze
author_facet	Kingsley Chukwuemeka Kanu Adebayo Akeem Otitoloju Nnamdi Henry Amaeze
author_sort	Kingsley Chukwuemeka Kanu
title	Assessment of the risk of death of Clarias gariepinus and Oreochromis niloticus pulse-exposed to selected agricultural pesticides
title_short	Assessment of the risk of death of Clarias gariepinus and Oreochromis niloticus pulse-exposed to selected agricultural pesticides
title_full	Assessment of the risk of death of Clarias gariepinus and Oreochromis niloticus pulse-exposed to selected agricultural pesticides
title_fullStr	Assessment of the risk of death of Clarias gariepinus and Oreochromis niloticus pulse-exposed to selected agricultural pesticides
title_full_unstemmed	Assessment of the risk of death of Clarias gariepinus and Oreochromis niloticus pulse-exposed to selected agricultural pesticides
title_sort	assessment of the risk of death of clarias gariepinus and oreochromis niloticus pulse-exposed to selected agricultural pesticides
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/62a07f60b78246e9a8bb10c81963732e
work_keys_str_mv	AT kingsleychukwuemekakanu assessmentoftheriskofdeathofclariasgariepinusandoreochromisniloticuspulseexposedtoselectedagriculturalpesticides AT adebayoakeemotitoloju assessmentoftheriskofdeathofclariasgariepinusandoreochromisniloticuspulseexposedtoselectedagriculturalpesticides AT nnamdihenryamaeze assessmentoftheriskofdeathofclariasgariepinusandoreochromisniloticuspulseexposedtoselectedagriculturalpesticides
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Assessment of the risk of death of Clarias gariepinus and Oreochromis niloticus pulse-exposed to selected agricultural pesticides

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