Author(s): Anmar W. Sabri
Article publication date: 1988-12-01
Vol. 6 No. 3 (yearly), pp. 439-448.
128
Keywords
seasons, River Tigris, amoeba
Abstract
Seasonal variation in the testaceous amoeba populations in the river Tigris was studied during 1984-85. Monthly samples were collected from eight stations along the stretch extending from Mosul to Baghdad. A total of 17 species were identified. Difflugia sp., Arcella discoides and Centropyxis sp. were the dominant taxa in the Tigris. Summer and late autumn were found to be the seasons of highest population density. The maximum abundance was 490 l^-1 recorded at station 6 during 1984. Variation in timing of peaks along the studied stretch is discussed.