The National Green Tribunal (NGT) has reserved its order regarding the decline of native fish species and the rise of invasive foreign fish in the Yamuna river. The case, initiated based on a May 2024 report, highlighted a decrease in Indian fish species and an increase in exotic ones. Pollution, altered river flow, and habitat degradation were identified as key factors affecting fish diversity.
A survey by the Central Inland Fisheries Research Institute (CIFRI) found that the Yamuna sustains 126 fish species, with the lowest diversity observed at ITO in Delhi, considered the most polluted site. The study noted a significant drop in iconic native species like Mahseer and Indian Major Carps, while exotic species such as common carp and Nile tilapia dominated large river stretches.
NGT expressed dissatisfaction with the responses from authorities, citing a lack of effective remedial measures. The Central Pollution Control Board (CPCB) also flagged water quality issues in the Yamuna, with stretches failing to meet wildlife and fisheries propagation criteria. CIFRI recommended actions like regulating illegal fishing gear, promoting native species, and addressing pollution for the river’s conservation.
