Begum Prianka¹ , Md. Mostafa Shamsuzzaman¹ , Sabrina Jannat Mitu¹ , Saokat Ahamed²

1 Department of Coastal and Marine Fisheries, Sylhet Agricultural University, Sylhet-3100, Bangladesh
2 Bangladesh Fisheries Research Institute, Saidpur, Nilphamari, Bangladesh
Author    Correspondence author
International Journal of Marine Science, 2020, Vol. 10, No. 7   doi: 10.5376/ijms.2020.10.0007
Received: 02 Sep., 2020    Accepted: 15 Oct., 2020    Published: 30 Oct., 2020

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Begum P., Shamsuzzaman M.M., Mitu S.J., and Ahamed S., 2020, Temporal variations of micro benthic assemblage in the Sangu River Estuary, Bangladesh, International Journal of Marine Science, 10(7): 1-14 (doi: 10.5376/ijms.2020.10.0007)

Temporal distribution of shellfish assemblages, together with water quality data, was conducted in the Sangu river estuary of Bangladesh to assess shellfish's diversity index during winter, pre-monsoon, and monsoon and post-monsoon periods. A total of 15 species of shellfish belonging to 9 families was recorded of which Acetes sp. (25.18%), Matuta victor (18.77%), Exopalaemon styliferus (18.28%), Parapenaeopsis sculptilis (14.22%) were found to be most dominant species during the study period. Significant temporal differences were observed for water temperature, salinity, water transparency, P^H and DO. The diversity indices, Shannon-Wiener diversity index and Margalef richness index showed a significant difference among the seasons while no significant difference was observed in the Pielou’s evenness index and Simpson dominance index. The analysis of similarity (ANOSIM) was used to test for significant differences in species assemblages between sampling seasons. At the similarity of 74.8%, three groups were attained while winter and pre-monsoon showed separate clustering from other groups. The Non-metric Multidimensional Scaling (nMDS) showed 50% similarity in all seasons based on Bray-Curtis similarity matrix. The CCA ordination indicated that temperature was the most important environmental parameter shaping the shellfish assemblage structure.

Acetes sp.; Fish Assemblage; Parapenaeopsis Sculptilis; Sangu river estuary; Species richness