تأثير المبيد الحشري الفا-سايبرمثرين في نمو و أعضاء تكاثر ذكور طائر الزيبرا فينش Taeniopygia guttata

Abstract EN

This study aimed to determine the effect of three concentrations (0.25- 0.50- 0.75mg/kg) of the Alpha-cypermethrin insecticide on the morphological, quantitative, and reproductive characters of zebra male birds when exposed to treated drinking water for long period (6 weeks).

The most significant morphological changes noticed are the loss of feathers in the head, neck, and abdomen areas, as well as the bleaching of the feathers' end.

No changes were observed in the body weight and the rate of weight growth and specific growth rate.

Concerning the reproductive effects, many histological changes were noticed in the testis, in response to the increase of the insecticide concentration.

The most important of these changes were the decrease in the average number of the seminiferous tubules, the number of sperms in the tubules' lumen, disorder in the stratification of the seminiferous epithelium, and the density of the connective tissue.

These results confirm the dangerous effect of this insecticide on animal life and reproduction, especially when the animals are exposed to high insecticide concentration for long periods.