Author(s): Sabri, A.W., Mahmoud, A.S. and Maulood, B.K.
Article publication date: 1989-12-01
Vol. 7 No. 3 (yearly), pp. 171-183.
176
Keywords
cladocera, Tigris river, Population
Abstract
The population of cladocera has been investigated in Tigris river from January 1983 to January 1984. A total of 33 species were identified. The dominant species were Bosmina coregoni, B. longirostris, Ceriodaphnia rigaudi, Macrothrix laticornis and Alona rectangula. A maximum of 163 x 10^3 m-3 was recorded. Late Summer and Autumn were found to be the best growth seasons. Upper stream stations were characterized with small number of species, mostly of benthic origin and lower population density. The effects of Samarra impoundment are shown in the results. Variations between stations along the river were evident and are discussed.