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Journal of Fisheries and Aquatic Science

Year: 2013  |  Volume: 8  |  Issue: 4  |  Page No.: 526 - 534

Analyses of Macrobenthos of Hatiya and Nijhum Dweep Islands at Higher Taxonomic Resolution

M. Belal Hossain, S.M.N. Amin, M. Asadujjaman and Sharmeen Rahman

Abstract

This study was carried out to describe the distribution and community pattern of benthic macrofauna collected from two nationally and internationally important islands, Hatiya and Nijhum Dweep in the period of January to June, 2010 using hand-held mud corer (10x10x10 cm) from seven stations. The coarser (order) level of taxonomic resolution was used to investigate the community attributes among the sampling stations. The study yielded a total of 10688.89 ind. m-2 macrofauna from all stations. Ten major taxa were identified from two islands and polychaete being the dominant. The average population density was 1526.98±1453.375 ind. m-2. There was a significant difference (p<0.05) in faunal density between Hatiya and Nijhum Dweep with later having higher mean density. The maximum (1.97) Shannon diversity index was found in St1 and the lowest (1.14) in St5. The highest similarity (76.6%) was found between St2 and St5. Multivariate analysis was conducted at order level of benthos using PRIMER. Bray-Curtis similarity measures among macrozoobenthic communities separated the stations into several cluster groups which was supported by nMDS ordination map.

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