Comparison of polychaets distribution and them Ecological indices in Bahrakan intertidal shore in autumn and spring seasons

Subject Areas : New Technologies in Aquaculture Development

Received: 2021-01-11 Accepted : 2021-01-11 Published : 2012-08-22

Keywords: Keywords: Bahrakan, Polychaets, Spices diversity,

Abstract :

Abstract[1] Polychaets are the group of macrobenthos and because of high species richness and diversity in ecosystem, exist in the varieties bed and habitats and play a significant role in food chain, many of ecologists in the whole of world attend them. In order to identification polychaets and determine their distribution in Bahrakan shore, samples of sediment were collected from 5 different stations in autumn and spring seasons. The samples after transferring to laboratory, were sieved using. 5 mm mesh size sieve. After washing and coloring with Rous Bengal, polychaets identified as far as possible genus or species. Physico-chemical parameter was mesured. Ecological indices for diversity, dominance, richness and evenness were calculated. Families of Syllidae and Cossuridae constituted 55% and 25% of total polychaets respectively in the autumn. On the other hand families of Nephtyidae, Syllidae and Glyceridae in the spring constituted 28%, 24% and 14% of total polychaets in the sediment respectly. At spring, polychaets have maximum density (2121 I/m2) and at autemn they have minimum density (1853 I/m2). Food increasing and vulnerable environmental conditions in spring was cased of increasing spices. Polychaets diversity in muddy shore of Bahrakan was decrease comparing to other shore. But polychaets diversity was increase comparing to pervious studies. Suggesting that building of artificial reefs case increase of diversity. *- Corresponding Authors; Email: [e-mail]