Identification and community structure of macro-benthose in Gahar Lake (Lorestan Province)
Subject Areas : Marine BiologyR. Mousavi Nadushan 1 , M.R. Fatemi 2 , N. Hasani 3
1 - . of Fishery, Islamic Azad University Tehran North Branch
2 - Dept. of Marine Biology, Islamic Azad University Science and Technology Research Branch, Tehran
3 - Dept. of Fishery, Islamic Azad University Tehran North Branch
Keywords: Macro-invertebrates, Gahar Lake, Profundal, population structure,
Abstract :
Lake Gahar is located in southwest of Iran, in East Lorestan province and at 2350m above sea level. There is little information and few studies on limnology of this lake . This tectonic lake is known to have a unique macro- invertebrate fauna. In order to perform a complete research on the zoo-benthic community of the lake, the present study was conducted during a period of seven months from April 2011 to December 2011 with the exception of 5 months during very cold seasons when the lake was covered by ice. The benthic assemblage was sampled monthly from 3 sites in profundal zone. In total 6 genera and species and 5 families were found from which 1 species is unique in Iran. In this research, the dominant species of the lake are Quistadrilus multisetasus , Stylodrilus herngianusof class Oligochaets and Pisidium casertanum of class Bivalvia. Their abundance percentage determined in respect of total distribution were %69, %13 and %6, respectively. The maximum abundance of total population of macro- benthos in Gahar lake was 11617.78±4910.379 individual per square meter in May and the minimum was 1436.32±671/87 individual per square meter in April.
