دراسة مقارنة للتراكم الحيوي لبعض العناصر الثقيلة في الدودة الشريطية Raillietina tetragona و بعض أنسجة حمام Columba livia في محافظة النجف الأشرف

Abstract EN

Collection of 40 birds from the pigeons Columb livia from period 1/ 10/2014 to 1/ 7/2015 was taken from different regions in the province of Najaf and after checking found that 25 of them were infected with bird tapeworms Raillietina tetragona with 50% Incidence of infection.

Four heavy metals were measured cadmium, lead, copper and chromium using Atomic- Absorption Spectrophotometer ASS in the muscles, intestine ,kidney, spleen and liver tissues as well as measured the concentration of these elements in the tapeworms R.

tetragona.

Cadmium element recorded high concentrations in liver tissues (0.47 m g.g -1 compared with muscle tissue (0.05 mg.g-1) .

While lead element concentration was 0.44 m g .

g -1in the liver 0.26 m g .

g -1, spleen 0.39mg.g-1 kiney, 0.22 mg.g-1 in the muscles and in the intestines0.06 mg.g -1 in the intestine.

The copper recorded the highest concentration in the spleen, which amount 1.01 mg.g-1while the chromium show low accumulation concentration compared with other metal concentrations.

However heavy metals concentrations in tapeworms tissues isolated from dove intestine were high compared with the host tissues while recorded the highest accumulation factor both elemental lead and cadmium elements.