Research Article
Fish Assemblage Patterns: Temporal Distribution Structure and Influence of Environmental Variables in the Karnafully River Estuary, Bangladesh
Md. Rashed-Un-Nabi1, Shamsuzzaman M2, Hasan A2 and Barman PP2*1Institute of Marine Sciences and Fisheries, University of Chittagong, Chittagong-4331, Bangladesh
2Department of Coastal and Marine Fisheries Faculty of Fisheries Sylhet Agricultural University, Bangladesh
- *Corresponding Author:
- Barman PP
Department of Coastal and Marine Fisheries
Faculty of Fisheries, Sylhet Agricultural University
Sylhet-3100, Bangladesh
Tel: +8801722967408
E-mail: ppbarman.sau29@gmail.com
Received Date: November 12, 2015; Accepted Date: March 11, 2016; Published Date: March 27, 2016
Citation: Rashed-Un-Nabi M, Shamsuzzaman M, Hasan A, Barman PP (2016) Fish Assemblage Patterns: Temporal Distribution Structure and Influence of Environmental Variables in the Karnafully River Estuary, Bangladesh. J Fisheries Livest Prod 4:174. doi: 10.4172/2332-2608.1000174
Copyright: © 2016 Rashed-Un-Nabi M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
This research aims at studying the temporal distribution of fish assemblage in the Karnafully river estuary, Bangladesh. To study the fish assemblage catch from Estuarine Set Bag Net (Behundijal) as well water samples were collected in four seasons (winter, pre-monsoon, monsoon and post-monsoon) from March 2013 to February 2014. Multivariate analyses were performed using the software PRIMER V6 and Canonical Correspondence Analysis (CCA) was done using the PAST software. In the present study, 41 species of fish were identified where, Harpodon nehereus (20.54%) was found to be most dominant species. The Shannon-Wiener diversity index (2.67 ± 0.05), Margalef richness index (5.14 ± 0.64), Pielou’s evenness index (0.96 ± 0.007) was high, while Simpson dominance index (0.95 ± 0.002) was low in the monsoon season, which indicates monsoon had high fish diversity than the other seasons. At the similarity of 50.5%, three groups were attained while, monsoon-2 showed separate clustering from other groups. The Non-metric Multidimensional Scaling (nMDS) showed 20% similarity in all seasons based on Bray-Curtis similarity matrix. The CCA ordination indicated that salinity and DO were the two most important environmental parameters shaping the fish assemblage structure in the Karnafully river estuary.
