Evaluation the Frequency and Diversity of Fish Species in Shour River, Khozestan province

This study aimed at determining and identifying of salty waterfish diversity and abundance from 2011 until 2012. Three stations (station 1: Batvand, Station 2: KohZar, Station 3: DashtBozorg) were chosen and sampling was done using Gill net, Slick and Sachok. Results showed that 13 species of fish belonging to 5 families exist in this river. Cyprinidae with 9 species had the most frequency (80.9 %) and in other families one species were identified. The Capoeta trutta were the most dominant species in all stations and Capoeta trutta, Cyprinum macrostomum, Liza abu,Cyprinon kais with 41.7, 19, 16.7, 8.4 were the most frequent species, respectively. The most frequentspeciesin the stations one to threewas estimated to be Capoeta trutta with 47.2%, 40% and 32.3 %, respectively and the least frequent speciesin all the three stations was Apanius mento.The average water salinity was variable. Station 2 (KohZar) and station 3 (DashtBozorg) were observed to have the highest and the lowest salinity with 7.18 ppt and 1.91 ppt salinity indices, respectively. Also station 2 (KohZar) and station 3 (DashtBozorg) with 25.35 0C and 21.750C, had the highest and the lowest temperature, respectively. In the present study the highest species diversity was in station 3 (DashtBozorg) with 1.93 and the lowest was in station 1 (Batvand) with 1.56 (p>0.05).