Volume 7, Issue 3 (winter 2018 2017)                   J. Aqua. Eco 2017, 7(3): 9-24 | Back to browse issues page

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Mirzabagheri D, Amrollahi Biuki N, Taheri Zadeh M R. Distribution pattern and a new coverage range index identification of zoanthids in littoral zone of Hormuz Island, Persian Gulf. J. Aqua. Eco 2017; 7 (3) :9-24
URL: http://jae.hormozgan.ac.ir/article-1-569-en.html
Abstract:   (12194 Views)

This study aimed to investigate the spatio-temporal changes in zoanthids abundances and to assess the influences of sea water parameters on their distribution. According to this, 2 sites in littoral zone of Hormuz Island were monthly studied from June 2015 to June 2016. Coverage range index (CRI) was also introduced as a new index in this study to assess the influence of the substrate composition on distribution of zoanthids. Line intercept transect method was performed to assess the zoanthid coverage along 6 transects. The results indicated significant relationship between substrate composition and coverage range of zoanthids. Hence, CRI proved to be a reliable index because of its strong fluctuations resulting mainly from total abundance of zoanthids. Also, the results indicated that zoanthids tended to colonize in low-littoral and mid-littoral zones, which are least exposed to air. Apparently, Zoanthus sansibaricus can tolerate desiccation conditions better than Palythoa cf. mutuki and Palythoa tuberculosa. From the results obtained, the abundances of 3 zoanthids during winter season showed an increasing trend, while during spring season it showed a reverse trend. Seasonal variations of sea water parameters were correlated with ecological attributes of species; where dissolved oxygen showed a positive significant correlation with mean seasonal abundance of each zoanthids at different study sites. Consequently, based on the findings of this study, zoanthids could be utilized as a bioindicator species of various environmental conditions in coastal waters.

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Type of Study: Research | Subject: Special
Published: 2018/05/17

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