Saprolegniasis on the eggs of the common carp (Cyprinus carpio L.) with the occurrence of micropredators at Al-Wahda fish hatchery, south of Baghdad

The aim of the present study is to find out if occurrence zooplankton with incubated eggs common carp (Cyprinus carpio L.) could increase fungal infection causing saprolegniasis in main fish hatchery Iraq during artificial propagation from April June 2009. Four treatments were used, highest hatching rate was 85.8 % treatment no. 2 which filtered water used incubate and lowest 21 negative control according availability absence fungicidal treatment. Crustacea identified were: Bosmonia, Cyclops, Daphnia, Moina, Nauplii aquatic insects Chironomas, Notonicta, Culex.