Effect of synthetic juvenoid hormone (Pyriproxyfen) on the larval stages and survival rates of fresh water prown (Macrobrachium rosenbergii)

We Collected 75 samples from fish meal factories in Guilan Province (codes: 1,2,3,4,5,6,7) based on two times per month during June to December 2001. Standard reference are used in bacterial and fungous identification. The isolated bacteria are E. coli Proteus spp., Citrobacter spp., Shigella spp., Enterobacter Aerogenes Salmonella spp., Klebsiella spp., Hafina Alvei Yersinia Enterocolitica, Edwardsiella spp., Staphylococcus spp., Bacillus spp., Pseudomonas spp., Clostridium spp., Aeromonas Hydrophila Streptococcus spp. The highest and lowest bacterial contamination observed in E. coli and Hafina Alvei respectively. The most important isolated fungi were Aspergillus spp., Penicillium spp., Yeasts Rhizopus spp. The maximum and minimum fungi decay in samples were Penicillium spp., and Rhizopus respectively. The most and the least microbial spoilage have been seen in factories 1 and 2 respectively.