The survey of fish population Hoor-Al azim marsh

Hoor-Al azim is one of most important and valuable wetland habitats. Study aimed to identifyanddetermine the abundance of fish in the Hoor-Al Azim marsh during2011-2012. In order to do this research 3 stations were selected and fish sampling was performedusing constant Gill net with 1.7 to 5cm springs. Results showed that there are 15 species of fishof 3 families in the marsh.Cyprinidae family had13 species and the highest frequency87.4. Mugilidae and Siluridae Families withone species were present. Carasobarbusluteus species in Rofaye station and Mesopotamichthys sharpeyi species inTaborstation were dominant and in total Carasobarbusluteus, Mesopotamichthys sharpeyi, Aspiusvarax,Lizaabu and Carassiusauratus species respectivelywith 28.7, 24.6, 15.7, 10.8 and 9.9 percent had the highest frequency during the study. The average water temperature, salinity, and pH in the marsh were 20.72° C, 2.07parts per thousand and 7.28, respectively.In the present study the maximum diversity wasinRofaye station with 1.93 and the minimum diversity was in Tabor station with 1.63.