TOXICITY OF CADMIUM AND COPPER AND THEIR EFFECT ON SOME BIOCHEMICAL PARAMETERS OF MARINE FISH MUGIL SEHEL

TOXICITY OF CADMIUM AND COPPER AND THEIR EFFECT
ON SOME BIOCHEMICAL PARAMETERS OF MARINE FISH
MUGIL SEHELI
EMAD H. ABOU EL-NAGA*, KHALID M. EL-MOSELHY and
MOHAMED A. HAMED
National Institute of Oceanography and Fisheries
Keywords: toxicity, cadmium, copper, aspartate and alanine transaminases, glucose, glycogen,
lipid, protein, fish (Mugil seheli)
ABSTRACT
The present work aimed to estimate the toxicity of cadmium and copper to
fingerlings of marine fish Mugil seheli, as well as the effect of different
concentratios of Cd and Cu on some biochemical parameters (Aspartate and
alanine transaminase enzymes, glucose, glycogen, lipid and protein) in the fish
organs. 96-h LC50s of Cd and Cu were 5.36 and 1.64 ppm, respectively. Levels of
aspartate and alanine transaminase were reduced within 2 days of exposure to
different concentrations of Cd (2.0 and 0.5 ppm) and Cu (0.5 and 0.2 ppm) in both
plasma and muscle tissue. Glucose was increased reaching the highest values after
4 days of the treatment with Cd and Cu, while muscle glycogen was increased at
first days then dropped after 14 days below control level. Generally, total lipids
and proteins in plasma and muscle recorded higher values than the control one.
The present study showed high toxicity of copper to fish Mugil seheli comparing
to cadmium.