EnvironmentA month of underwater recordings in the tidal Rupnarayan river found dolphin clicks peaked at 4-6 am and 6-8 pm and at water levels of 1.5-2 metres, findings that could change how surveys are timed.
EnvironmentA climate model of the rare Himalayan river bird finds suitable conditions may expand along mid-elevation rivers, but scientists warn that boulder and sand mining, garbage and dogs are degrading its breeding grounds.
EnvironmentAn exhibition organised by Dhoritri Rokkhay Amra (DHORA), showing 170 photographs by Abir Abdullah and Ansar Uddin Khan Pathan, runs until 6 October.
The Chhaber Mor fish market near Sirajganj town opens at dawn and is over by 8am. Buyers want native small river fish, but the supply is shrinking.
Barishal fishers catching few hilsa want the 22-day mother hilsa ban due from 4 October pushed back, and a proposal to delay it by 15 days is under review.
River researcher Tuhin Wadud found the Kharpa, Kachua, Shalmara and Sangli in the border belt of Hatibandha and Patgram; none appears in the records of the Water Development Board, the river commission or the water ministry, whose officials now want them listed.
A dead whale about 30 feet long washed up on the bank of the Andharmanik river in Taltali, Barguna, drawing crowds from far and wide.
Government and World Bank data show untreated industrial effluent, sewage and solid waste are severely polluting Bangladesh's rivers, above all around Dhaka, writes Moazzem Hossain Tipu.
Local hilsa is selling far above Indian hilsa at Chattogram's Fishery Ghat because a storm signal kept trawlers from bringing in enough fish, but traders expect prices to ease within days.
Fisheries and Livestock Minister Mohammad Amin Ur Rashid said the government is focusing on river dredging, stopping jatka catches and ending current-net use to protect hilsa.
Water resources minister Shahid Uddin Chowdhury Anee said rivers and canals cannot be protected without coordinated work by all ministries and agencies.
The Department of Fisheries says June's hilsa catch in the Barishal division was the highest in six years, but traders, fishers and buyers see scarce supply and record prices.
Huge baited bamboo traps known as chai are catching vast numbers of pangas fry in the rivers and estuaries of southern Bangladesh, threatening the fish's breeding cycle.
