التأثيرات الحادة و المزمنة لمبيد الحشرات سايبرمثرين في اسماك الكارب الاعتيادي Cyprinus carpio L.1758

Abstract EN

This study included acute and chronic effects for cypermethrin pesticide in Cyprinus carpio.

Eight concentration between 0.005 and 0.0007 mg / L was used in the acute exposure for 24 to 96 hours to determination of median lethal concentration (LC50), lethal concentration for the complete number (LC100), non lethal concentratin (LC0) and Safety concentration (SC), also behavioral changes was used as a standard of those effects.

Whereas two concentration 0.0007 and 0.0008 mg / L were used in the chronic exposure for 60 days, through it clinical signs (behavioral, weight and histological changes) and histopathological changes were used as a standard to observed these effects through the study period.

The value of LC50 for carp fish were 0.0025, 0.00231, 0.00214, 0.00212 mg / L for 24, 48, 72, 96 hrs respectively.

Of exposure to cypermethrin pesticide concentrations respectively.

The LC100 values for 24 hrs.

Of exposure were 0.005 mg / L while LC0 values for 24 hrs.

Of exposure were 0.0008 mg / L.

The safety concentration values were 0.000231, 0.0003465 mg / L.

Behavioral changes were recorded more effects in high concentrations than it in low concentrations.

The chronic exposure showed no any behavioral changes was recorded except on the fifth days at 0.0007 mg concentration.

Moreover the growth was reduction in each of the concentrations that used and show more effect at the second concentration.

Histopathological changes were showed clearly at some carp members such as : liver, kidney, intestines, spleen and muscle that exposed to a pesticide at 0.0008 mg / L concentration only.