The viva-voce examination on the Ph. D thesis entitled “STATUS OF SHELLFISH FISHERIES IN CHALAN BEEL AND ITS ENVIRONMENTAL AND SOCIO-ECONOMIC IMPACTS”  was defended by Goutam Singha held on May 12, 2026 at 12:30 pm at the office of Director, Institute of Environmental Science, University of Rajshahi, Rajshahi-6206, Bangladesh. Principal Supervisor Associate Professor Dr. Shams M. Galib, Department of Fisheries , University of Rajshahi, Co-Supervisor Professor Dr. M. Nazrul Islam, Department of Zoology, University of Rajshahi.