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Predatory Foreign Fish Killing Native Species in Bengaluru Lakes

Fishes are dying in Bengaluru lakes, and pollution and contaminated water are not the only reasons.

News18.com

Updated:May 3, 2016, 2:40 PM IST
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Predatory Foreign Fish Killing Native Species in Bengaluru Lakes
Municipal workers clear dead fish from the Ulsoor Lake in Bengaluru. (Photo/Reuters)
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Bengaluru: Fishes are dying in Bengaluru lakes, and pollution and contaminated water are not the only reasons.

Indian Institute of Science (IISC) scientists have come out with a new finding behind the death of lakhs of fishes belonging to the native species in the last few years.

They claim that introduction of exotic fish species such as African Catfish and Tilapia which are a threat to the native fish along with ammonia toxicity are responsible for the catastrophe.

Exotic fish species eliminate native biota and affect local biodiversity, concludes the study led by Dr TV Ramachandra. More such fish-kills could be in the offing due to the indiscriminate growing of such species in lakes across Bengaluru, says a report in Deccan Herald.

According to scientists African Catfish is highly predatory and can weigh up to 60 Kilos. It feeds on other species.

To save the native fish, the scientists suggest complete eradication of African Catfish from the lakes and other water bodies.

Moreover, untreated inflow of sewage into lakes is also responsible for the death of native fish in large numbers. The rising temperature is also leading to depletion of dissolved oxygen killing the native fish.

Speaking to News18 Karnataka Law, Parliamentary Affairs and Higher Education Minister TB Jayachandra said that the government was worried about it and they would introduce strict guidelines to regulate the introduction of "foreign" fish.

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