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The research was carried out to investigate phytoplankton, zooplankton and Ichthyoplankton of Khamir, Laft in the western parts of Hormozgan Province and Tiab, Yekshabeh in the eastern parts of it for one year from March 2015 to November 2016. The aim of the study was to achieve seasonal changes of phytoplankton, zooplankton and Ichthyoplankton and compare them among estuaries. In order to achieve this goal, four stations were determined and seasonally sampled. Phytoplankton was taken 2 liter by bottle from 0.5 m below water surface, Zooplankton sampling was done by using standard plankton net with 55 micron mesh size that well equipped with flow meter by horizontal pulling and Bongo Net with 300 micron mesh size used for Ichthyoplankton sampling. During the study, 80 species of phytoplankton were identified, including 53 species, 24 species Dinophyceae, Cyanophycea 2 species and 1 species belonging to Dictyochophyceae. East and West estuaries had the 63% similar percentage of phytoplankton and results showed that 54 Bacillariophyceae genus were common in two regions. The Tiab estuary showed an average 21524±5903 cells/L of phytoplankton high density. Zooplankton was identified with eight phylum. The study of seasonal variations showed that in all seasons crustacean had higher density than other groups. Four copepods orders were identified which the calanoid had higher density and distribution in compare to others. 19 families of the larvae were identified and 69/99% similarity was also observed between estuaries of two region. Glupeidae, Gobiidae, Engraulidae and Scianidae families were abundant than other families. Shannon-Wiener, Maraglef and Evenness biological indices were found higher in west than the East estuaries. The results showed values were the highest in laft estuary, respectively H'= 3/22, d=7/11 and J'=0/72. The lowest biological indices in Tiab estuary, respectively H'= 2/233, d= 4/109 and J'= 0/597. The estuaries in the West had more diversity and eveness. The highest and lowest of biological indices were obtained (d= 5/948 and H= 2/759) and (d=2/825, H=0/830 and J=0/249) in the winter and summer, respectively. Iranian Fisheries Science Research Institute Published |
