دراسة بيئة اللافقريات مجذافية الأقدام في رافد الزاب الأسفل و نهر دجلة-العراق

Abstract EN

Monthly samples of copepoda were collected from four stations located in Lower /.ah tributary and Tigris River, the study conducted for cine year starling in Nov.

2001 to Oct.

2002.

41 taxa of copepoda were identified in the present investigation.

Higher density of copepoda recorded in Tigris river (116 ind./L) before the confluence of Lower Zab tributary, while the density decreased to (28.5 ind./L) after the confluencc reflecting the negative effect of (he tributary on Tigris river.

The genera Cyclops, Diaptonms and Macrocyclops represented by 14, 5 and 4 species, respectively.

The dominated species was Halicyclopes sp.

Followed by ParacycJops fimhriafus and Nitocra sp.