Evaluation of fish assemblage environment in east Hammar using Integrated Biological Index


An Index of Biotic Integrity (IBI) was used to assess the status of the fish assemblage of east Hammar marsh from October 2005 to September 2006. IBI scores were calculated from 16 separate assemblage metrics based on the species richness, species composition and trophic guilds. After more than two years of restoration activities and improved water quality, the state of the fish community in Hammar marsh was fair during 2005-2006 (IBI= 42.6%), and better than the same study marsh after four years of restoration (IBI=40.8%). The results revealed that no substantial improvements have been recorded during the late years of restoration, reflect that the environment is still fragile and need time to be recovering.