Climate-induced changes in fish species distribution in Indian rivers
DOI:
https://doi.org/10.59436/jsiane.386b.2583-2093Keywords:
Climate change, fish distribution, Ganga basin, Uttar Pradesh, inland fisheriesAbstract
Climate change interacts with local anthropogenic stressors to drive measurable shifts in fish species distributions in the Ganga basin and its tributaries near Uttar Pradesh. By synthesizing long-term monitoring (ICAR-CIFRI/NMCG), district and riverine surveys (Gomti, Ghaghara, Rapti, Saryu), and fisher knowledge up to 2024, we document expansion of warm-affinity and generalist taxa, an increase in occurrences of non-native fishes, and contraction or irregular recruitment of some migratory and flow-dependent species. Environmental trends (rising summer water temperatures, more frequent low-flow periods and greater monsoon variability) correlate with these biological changes. We discuss mechanisms, socio-economic implications for inland fisheries, and priority adaptation measures: restoring connectivity, protecting thermal refugia, improving water quality, and standardized long-term monitoring.
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