Hemant Kumar Das* & Khalid Mehboob Khan
University Department of Zoology, D.S.P.M. University, Ranchi, Jharkhand, India
Received : 05th December, 2024 ; Revised : 10th January, 2025
DOI:-https://doi.org/10.5281/zenodo.15732097
Abstract– The spatiotemporal fluctuations in ichthyofaunal assemblages across Jumar and Potpoto rivers, located in Subarnarekha River basin were critically evaluated till 2023 over a triennial period (2021-2023), and how the physicochemical parameters such as dissolved oxygen, pH and temperature correlated with them. Seasonal variation in species richness and abundance showed monsoonal peaks in the optimal reproductive thermoperiod and elevated oxygenation. Despite physicochemical similarity, patterns of multivariate divergence ebbed and flowed with ecological divergence, but habitat complexity and potential sublethal ecotoxicological stressors modulated diversity gradients. The data highlight the importance of environmental heterogeneity, anthropogenic perturbations, and trophic plasticity to structure mid order tropical riverine ichthyofauna within basin specific ecological settings.
Keywords: Fish Diversity, Physicochemical Parameters, Jumar River, Potpoto River, Biodiversity Assessment, Water Quality, Ranchi District
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