Fishermen remove invasive species from Kosasthalaiyar River

CHENNAI: Aggrieved by inaction of the government in controlling the spread of the invasive Charru Mussels (Kaaka Azhi) in Kosasthalaiyar River even after warning from local fishermen, scores of residents around Ennore Wetland commenced removal of the invasive species with hands as a temporary measure.

Fishermen commenced the drive on Tuesday and on Wednesday about 130 fishermen took part in the exercise. On the day, they removed Charru Mussels from Karukkumaram-Kadachedi Paadu (fishing site), which is one of the severely affected fishing sites.

Locals said that at least 11 of the 52 fishing sites have already been affected. "Especially in Karukumaram-Kandachedi Paadu area, Kaaka Azhi had grown up to a height of about 3-4 inches above the water level. Due to its infestation, for the past 3 weeks there has been severe disruption to boat movement," they said.

As this fishing area of the river became inaccessible, fishers couldn't access the remaining unaffected fishing grounds in the northern part of the fishing site.

To make access for the boats, fishermen removed the invasive species on the middle part of the river for about 7 feet width and 50 feet length. On the first day, residents of Kattukuppam carried out the work and on the second day, residents from Mukathuwarakuppam carried out.

"Despite wearing gloves and socks, kaaka azhi and its slimy excreta has caused severe skin irritation to the fishers. They removed the infested Azhi along with its 2-feet deep black, foul-smelling sludge at its bottom," they said.

Kumaresan, one of the fishermen, said it is very painful that the government has not taken action even though they have warned about its invasion. "Although they are now dead post the fresh water from monsoons, they will re-infest. The current impact will go manifold. We request immediate action from the government to resolve this issue," he urged.

In December, fishermen from Ennore, along with environmentalists, met the press and raised alarm over the invasion. They also urged the government to take measures to stop further spread.

Meanwhile, the Water Resources Department and Tamil Nadu State Wetland Authority are carrying out a study to dredge a portion of the river to remove the invasive species and slit.

However, dredging works are yet to be commenced.