Concern as dead fish float in Guwahati tank
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Dip in oxygen stage, excessive natural load in tank causes for the mortality, says Minister
At least 400 dead fish had been on Sunday discovered floating in a Guwahati tank mentioned to have a Mahabharata hyperlink.
Joggers across the metropolis’s iconic Dighalipukhuri, which means “long pond”, detected the fish floating and introduced it to the discover of the native authorities.
Minister for Fisheries Parimal Suklabaidya mentioned division officers ascertained the trigger behind the mass deaths of the fish. The dead fish weighed about 600 kg.
“The fish mortality was due to sudden dip in oxygen level and high organic load in the tank. Departmental officers, after examination, found death of fish not due to poisoning but environmental degradation,” he mentioned, including that water was showered over the tank as a short-term measure with pumps to extend the oxygen stage.
Paddle boat service
Jayaditya Purkayastha, an aquatic animal specialist who has been engaged on turtle conservation throughout Guwahati’s ponds, mentioned the native authorities ought to resume paddle boat service as a apply with none passengers and spank the water with bamboo to extend the dissolved oxygen (DO) in the tank.
Popular regionally, the boating service on Dighalipukhuri was stopped in 2020 following COVID-19 outbreak.
“DO is one of the most important factors for the maintenance of biodiversity in a pond. Our atmosphere has about 20% oxygen or 2,00,000 parts per million (ppm) but only about 1,00,000 ppm gets dissolved in water. DO concentration below 3ppm will kill fish,” he mentioned.
Non-penetration of daylight because of a layer of algae has additionally been an element behind the fish demise. “Boating and spanking the water prevents surface algae from accumulating,” he mentioned.
Dighalipukhuri, about 500 metres lengthy, is related to the legend of native king Bhagadatta, who fought for the Kauravas in the battle of Kurukshetra. One of his elephants was named Ashwatthama.
It is claimed that Bhagadatta had dug the pond through the ‘swayamvar’ of his daughter Bhanumati.
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