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47 of 68 fish species in India under threat, says study -Vaishnavi Chandrashekhar

-The Times of India

MUMBAI: More fish species on the east coast, especially in the waters off Odisha and West Bengal, are highly vulnerable to climate change, according to a first-of-its-kind assessment by the Central Marine Fisheries Research Institute (CMFRI).

That vulnerability stems not only from changes in climate but from fishing pressure and lower productivity .

Overall, 69% of the 68 fish species studied were found to be vulnerable to climatic changes. They include Bombay duck, tuna, sharks, various shrimp, pomfret, and catfish, among others. "The west coast also has high fishing pressure but is richer in fish so it is a bit less vulnerable," said Dr P U Zacharia, CMFRI scientist and lead author of the report.

Fish inhabiting surface or near surface waters like tuna, mackerel and sardine are most affected by temperature change; they also account for a sizeable chunk of the catch.

Overfishing plays a major role in the vulnerability of 16 species. "Overfishing leads to increased sensitivity to climatic fluctuations," Zacharia said. Vulnerability hinges on the ability of a species to adapt to climatic change. Their spawning patterns, geographic location and the availability of prey would eventually determine their numbers.Species most under pressure include Bombay duck on the western coast, hilsa in the east and the oil sardines found off Tamil Nadu.

For the assessment, the CMFRI studied important fish species in four geographic zones: northwest (comprising Gujarat and Maharashtra), southeast (Goa, Karnataka, and Kerala), southeast (TN and a part of AP), and southwest (northern AP, Odisha and WB).

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