Publication Date:
2021-07-15
Description:
The experiment was conducted to evaluate the acute toxic of cypermethrin, a synthetic pyrethroids on juveniles of Clarias gariepinus. The effect was assessed based on the comparism results of haematology and histopathological tissues examinations of control and experimental group exposed to five nominal concentration of cypavest, 10EC Pesticide Preparation (active substance 100mg/l) of cypermethrin in a static non-renewal bioassay for 96 hours. The 96hrs LC50 value of the exposed juveniles was found to be 0.062 mg/1. Fish exhibited progressive loss of balance, respiratory distress, erratic movement and death. Examination of haematology significantly showed higher value (P〈0.001; 0.01) of white blood cell (WBC), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), packed cell volume (PCV), monophilis and heterophilis; a significant reduction (P〈0.001, 0.01) in Red Blood Cell (RBC) and Lymphocyte was obtained as compared to the control. Severe necrosis, haemorrhages vacuolation, congestion and focal interstitial haemorrhages were the stopathological changes in the tissues of gill and liver, thus concluding that cypermethrin is toxic to juveniles of Clarias gariepinus.
Description:
Includes: 17 references.
Keywords:
Pollution
;
Aquaculture
;
Clarias gariepinus
;
Nigeria
;
Borno State
;
Cypermethrin
;
cypavest
;
Synthetic pyrethroid
;
Static-non renewal
;
bioassay
;
freshwater environment
;
Histopathology
;
Haematology
;
Toxicity
;
Freshwater fish
;
Juveniles
;
Pollution effects
;
Evaluation
;
Comparative studies
;
Experimental research
;
Bioassays
;
Toxicants
;
Pesticides
Repository Name:
AquaDocs
Type:
conference_item
,
TRUE
Format:
application/pdf
Format:
application/pdf
Format:
322-326
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