Brood fishes of different indigenous species have started releasing eggs in Halda River of Chattogram, one of the major natural breeding grounds of fish in South Asia.
Hathazari upazila nirbahai officer Mohammad Ruhul Amin said that since Friday morning, the brood fishes started releasing eggs in full swing for the first time in the current season.
He said that the brood fishes had started releasing sample eggs at midnight to test the congenial aquatic atmosphere.
Kamal Sawdagor, a fisherman of Garduyara Nayahat area, said that his team started collecting eggs with six boats since 12:00am. After 7:00am, a huge amount of eggs have been netted.
Another egg collector Mohammad Elias of Ramadash Haat area said that they have six boats which are being used in collecting eggs. Till 10:00am, they have collected six buckets of eggs.
Fishermen expecting a big haul this year as pollution and human activity have dropped significantly in the river.
Manzoorul Kibria, a professor of Chattaogram University’s Zoology Department and president of Halda River Protection Committee said that over 600 fishermen with 280 boats began collecting the fertilised eggs from the river’s Kagatiyara point to Garduyara Nayahat point.
He said that usually the brood fishes release sample eggs to examine if there is a favourable environment to lay eggs in full swing.
The temperature of the water, strong currents and thunderstorms are some key factors to create a congenial atmosphere for the brood fish to lay eggs in the river, said the expert.
Every year, during the Bengali months of Baishakh and Jaishtha, different indigenous species of carps like the catla, ruhi, mrigal and kalbaoush start migrating to the spawning ground of the Halda from rivers like the Karnaphuli, Matamuhuri and Sangu.
Due to the pollution caused by industrial effluents, netting of brood fishes, and sand excavation downstream were destroying the Halda’s natural environment and hampering fish breeding that led to a remarkable decrease of breeding till 2017.
However, in recent years as the local UNO increased surveillance to stop netting brood fish, Halda River is getting back its main natural stream.
In 2017 only 1,680 kg, in 2018 around 22,680 kg and last year 6,987 kg eggs were collected.
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