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Research Paper | Environmental Biology | India | Volume 12 Issue 8, August 2023 | Rating: 5.2 / 10

Ichthyofauna Diversity in the Churni River, West Bengal: An In-Depth Analysis of Seasonal Variations

Debgopal Maity | Tapan Kumar Chatterjee ^[6]

Abstract: The present study was carried out a qualitative and quantitative assessment of diversity of ichthyofauna in river Churni, West Bengal, India during pre- and post-monsoon seasons. The ichthyofauna species diversity indices such as total specimens (N), Shannon diversity index (H'), Index of Dominance (C), Berger-Parker Dominance Index, and Margalef?s species richness index (S) and Gini coefficient (G) index were calculated. An increasing trend of total number of species (20 nos.), total numbers of organisms (1599 nos.), diversity index (2.90), Index of Dominance (0.94) and Margalef species richness (2.60) in post-monsoon when compared to pre-monsoon (18, nos., 1331 nos., 2.80, 0.93 and 2.40). While a decreasing trend of Berger-Parker Dominance Index (0.09) and Gini coefficient (0.28) in post-monsoon when compared to pre-monsoon (0.11 and 0.28) were obtained. It is concluded that the diversity of ichthyofauna was observed lower during pre- and post-monsoon period, which may be due to environmental pollution in the river Churni. Moreover, the in situ conservation methods may help to maintain aquatic diversity. It is suggested in future to evaluate the physico-chemical properties and the concentration of metal (loids) in the river water and sediment.

Keywords: Ichthyofauna diversity, Fish diversity, Churni river, Water pollution, Biodiversity indices, West Bengal

Edition: Volume 12 Issue 8, August 2023,

Pages: 1174 - 1178