التغيرات في تركيبة تجمع أسماك هور شرق الحمار، جنوب العراق

الملخص EN

The fish assemblage in the East Hammar marsh was described during November 2012 to October 2013.

A total of 17 fish species belonging to 19 families were collected, 11 of them were native, nine alien and 19 marine species.

The fish assemblage characterized by increasing the percent of alien species of which Carassius auratus and Poecillius latipinna were the most abundant comprising 22.1% and 14.3% respectively, in addition to Tilapia zilli.

Also, the values of ecological indices were increased in which fish species diversity index ranged from 1.95 to 2.74, richness from 2.32 to 3.81 and evenness from 0.69 to 0.84.

These changes in the structure of fish assemblage of the marsh may be due to impact of marine waters progress from Arabian Gulf, heavy rains and the discharge from the Main Outfall Drain.