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233055

Lethal Toxicity and Behavior Changes of Oreochromis spilurus Fish Under Stress of Contra/Insect 500/50 E.C. Insecticide

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Last updated: 03 Jan 2025

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Abstract

The present study is part one of serial studies on the effect of the insecticide contra/insect 500/50 E.C. on the behavioral, physiological, biochemical, and histological parameters of the fresh and salt water Tilapia species. The Contra/Insect insecticide is a broad-spectrum insecticide combining the joint action of two well-known insecticides, chlopyrifos and cypermethrin. During this part of the study, an attempt has been made to estimate the lethal toxicity of the contra /insect and its effect on the behavior of the saltwater fish; Orechromis spilurus. Healthy fish were exposed to different concentrations of the insecticide that ranged from 0.01 to 1.5mg/L for 96hours. Water in the aquaria was renewed every 24 hours to standardize the water conditions for the fish. The aquaria water was monitored for temperature, salinity, pH, and dissolved oxygen twice daily during the experimental period to observe any significant fluctuations that might influence the study results. The computed results indicated that the insecticides' 48 hours LC50 and LC90 for the Oreochromis spilurus were 0.3764 mg/L and 0.9033 mg/L. The study observations showed remarkable changes in the fish behavior, characterized by restlessness, aggressiveness, uncoordinated movements, loss of equilibrium and air gulping. Some of the fish which were exposed to lower concentrations of the insecticide; 0.1 mg/L and less; tended to recover while others developed uncontrolled, and irreversible conditions and died. In the present study, water quality variables were standardized, which indicated that there was no significant effect of these measured variables on the study toxicity levels and behavior investigations.

DOI

10.21608/jhiph.2001.233055

Keywords

Lethal toxicity, behavior changes, Oreochromis spilurus Fish, Under Stress, Contra/Insect 500/50 E.C. Insecticide

Authors

First Name

Fatma

Last Name

El-Nemaki

MiddleName

A.

Affiliation

Department of Biological Science, King Abdulaziz University, Faculty of Science, Jeddah, Kingdom of Saudi Arabia

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Volume

31

Article Issue

2

Related Issue

33408

Issue Date

2001-04-01

Receive Date

2022-04-24

Publish Date

2001-04-01

Page Start

193

Page End

202

Print ISSN

2357-0601

Online ISSN

2357-061X

Link

https://jhiphalexu.journals.ekb.eg/article_233055.html

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https://jhiphalexu.journals.ekb.eg/service?article_code=233055

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1

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Original Article

Type Code

511

Publication Type

Journal

Publication Title

Journal of High Institute of Public Health

Publication Link

https://jhiphalexu.journals.ekb.eg/

MainTitle

Lethal Toxicity and Behavior Changes of Oreochromis spilurus Fish Under Stress of Contra/Insect 500/50 E.C. Insecticide

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Article

Created At

22 Jan 2023