Journal of Coastal Conservation

, Volume 15, Issue 1, pp 163–180

Environmental variables and fisheries diversity of the Naaf River Estuary, Bangladesh

Authors

    • Institute of Marine Sciences and FisheriesUniversity of Chittagong
  • M. Shahadat Hossain
    • Department of Ecosystem Science & ManagementTexas A & M University
  • Nani Gopal Das
    • Institute of Marine Sciences and FisheriesUniversity of Chittagong
  • Prabal Barua
    • Fisheries and Aquaculture Division, Department of ZoologyUniversity of Calcutta
Article

DOI: 10.1007/s11852-010-0130-3

Cite this article as:
Chowdhury, M.S.N., Hossain, M.S., Das, N.G. et al. J Coast Conserv (2011) 15: 163. doi:10.1007/s11852-010-0130-3

Abstract

The Naaf River estuary is one of the large estuaries in the Bangladesh coastal region not to have been affected by extensive human disturbance. This research provides information about the fisheries diversity status by Estuarine Set Bag Net (ESBN) sampling relation to physicochemical variables in both spatio-temporal scales. About 25 km of the lower estuary was divided into six zones for sample collection by considering the accessibility and availability of the ESBN operation, fish landing centers and location of the fishing villages. In total 48 samples have been analyzed which were taken throughout March to October 2006. To quantify the species diversity, all fisheries data were analyzed by using EstimateS and EcoSim software which accounts the different diversity indices viz., species richness, Shannon–Wiener diversity Index, Dominance and Evenness index. The research results demonstrate that the Naaf River estuary is a habitat of 161 (species richness, Sobs = 161, Choa 1 = 162 ± 2.34, ACE = 161.73) different species which belong to 98 fin fishes, 23 shrimps and prawns, 13 crabs, 11 molluscs, 3 echinoderms, 4 other crustaceans; while 9 remain unidentified. Results on the aquatic environment, mainly salinity and turbidity were found to have a major influence on their occurrence and distribution. All the findings indicated that the Naaf River estuary is a highly productive system and provides a favourable environment for large variety of estuarine species assemblages.

Keywords

Fisheries diversityAquatic environmentNaaf RiverEstuaryDiversity indexESBNSpecies assemblagesHabitatProductive systemFavourable environment

Abbreviation

ACE

Abundance-based Coverage Estimator

BIWTA

Bangladesh Inland Water Transport Authority

ESBN

Estuarine Set Bag Net

EstimateS

Statistical estimation of species richness and shared species from samples

GPP

Gross Primary productivity

NPP

Net Primary Productivity

Copyright information

© Springer Science+Business Media B.V. 2010