1. Ahamed F, Saha N, Ahmed ZF, Hossain MY, Ohtomi J (2018) Reproductive biology of Apocryptes bato (Gobiidae) in the Payra River, southern Bangladesh. J Appl Ichthyol 34(5):169–1175
2. APHA (American Water Work Association and Water Pollution Control Federation) (2005) Standard methods for the examination of water and wastewater, 22nd edn. American Public Health Association, Washington DC
3. Brown DJA, Sadler K (1989) Fish survival in acid waters. In: Morris R (ed) Society for Experimental Biology Seminar Series, University Press, London, pp 31–44
4. Dobriyal AK, Rautela KK, Rautela AS (1999) Invention of a new index for the determination of sexual maturity in fishes. Uttar Pradesh J Zool 19:207–209
5. DoF (Department of Fisheries) (2019) National Fish Week 2019 compendium. Ministry of Fisheries and Livestock. Government of Bangladesh, Dhaka