Tamirabharani’s endemic fish face threats from pollution, habitat loss
The Tamirabharani river in Tamil Nadu is home to seven endemic fish species that are currently facing severe threats from pollution, habitat loss, and invasive species. Experts warn that the decline of these unique fish populations serves as a critical indicator of the river's deteriorating ecological health.
Why it matters
The loss of these endemic species signals the potential biological collapse of a vital river system, highlighting the urgent need for conservation efforts to protect biodiversity and water quality.
The Tamirabharani, the only river in Tamil Nadu that originates and culminates in the sea within the State, supports a highly diverse fish fauna, including seven endemic species that derive their names from the river and places through which it flows.
A total of 125 fish species have been identified in the upstream, midstream, and lower estuarine stretches of the river. Of these, seven are found exclusively in the Tamirabharani.
Hypselobarbus tamiraparaniei | Photo Credit: Special Arrangement
Pollution, habitat destruction, loss of riparian vegetation, invasive fish and aquatic plants, the use of soaps and shampoos by people bathing in the river, rituals on its banks, the dumping of pooja materials and clothes, and the discharge of untreated sewage have contributed to the decline in their populations.
One of the endemic species, Dawkinsia tambraparniei, has already been categorised as endangered.
Garra kalakadensis | Photo Credit: Special Arrangement
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