Study of Frequency and some index fish biodiversity in Azini creek, Hormozgan Province

This study aimed to identify and determine the species diversity of fish in the Arizin creek in the east of Hormozgan province for one year in 1395. Sampling of fish by trawls boat and was done seasonally. In this study, 41 species belonging to 30 genus and 26 families were identified. The greatest abundance and diversity were related to Leiognathidae and Clupeidae families with 19.2 and 15.3 percent respectively. The most frequent species in the spring season, Thryssa vitrirostris 45.8 %, Summer leiognathus fasciatus 36.3 %, autumn, Gerres filamentosus 20.8% and in winter leiognathus fasciatus13.2 %, respectively. The abundance of fish in the spring with other seasons, there was a significant difference (p <0.05) planktonic feeder species were the most frequent in the spring. In other seasons, fish with small carnivorous diet and Hunter were more abundant. Families Leiognathidae, Platycephalidae, Gerreidae, Sillaginidae and Haemulidae samples were collected in all seasons. Shannon diversity index was highest and lowest values in winter and spring with 1.33 and 0.86, respectively. Also the highest richness index was 4.5 and 2.64, respectively, in the winter and spring and maximum value evenness were 0.42 and 0.31 in the winter and spring.