التغيرات الموسمية لمستويات بعض العناصر الثقيلة في أنسجة أسماك باسي Nemipterus japonicus المصادة من المياه البحرية العراقية

الملخص EN

The present study deals with the seasonal variations of some heavy metal's concentrations (cobalt, manganese, cadmium, iron, nickel and cupper) in four organs (liver, gills, ovaries and muscles) of Nemipterus japonicus, which collected from Iraqi marine waters during the period between January 2010 and December 2010 Heavy metals have been determined by means of Atomic Absorption Spectrophotometry.

The fish average length was 161 mm and the average weight was 73.2 g.

From the results, cobalt, manganese and cadmium showed the highest values in gills (19.76, 18.32 and 17.43 μg/gm dry weight) during winter, summer and spring, respectively.

Iron and nickel showed the highest values in liver during spring (150.40 and 201.19 μg/gm dry weight), respectively.

Ovaries showed high levels for cupper (25.25 μg/gm dry weight) during spring.

This study showed that the concentration of heavy metals distributed in the organs was as follows: gills > liver > muscles > ovaries, while the heavy metals concentration had been distributed in fish organs as follow: iron > nickel > cupper > cobalt > manganese > cadmium.