Paulomi Dutta* & S.B Lal
University Department of Zoology, Kolhan University, Chaibasa, Jharkhand, India
Received : 30th May, 2021 ; Revised : 01st July, 2021
Abstract– The present study elucidates about the survival rate, mean body weight, length, and biomass production of white leg prawns (Penaeus indicus) in reference with the water quality parameters at the two different sites of river Subarnarekha at Mango, Jamshedpur and Galudih. The study reveals the seasonal fluctuation along with the physiochemical parameters such as temperature, pH, dissolved oxygen and salinity. The study was conducted through entire seasonally from August, 2019 to March, 2020 which includes four seasons of monsoon, autumn, winter, spring/summer. These physiochemical parameters show a great influence in growth and development of Penaeus indicus, especially dissolved oxygen and salinity are the two main factors that provide an impact on the biomass production of prawns, their size, length and their survival rate. The study also shows that the quantity and quality of prawns (Penaeus indicus) become low at Mango, Jamshedpur because of the water quality which happens because of the industrial area pollution as well as of domestic wastes, weeds etc. whereas, Galudih area shows a good quality of water far better than Jamshedpur area as well as its ranges too increases in biomass production as well of white leg prawns. Thus, the study reveals about the physiochemical analysis of water especially dissolved oxygen and salinity which provide a great impact on the white leg prawn’s flourishment and development, as they are wild type and found naturally in the river water of Subarnarekha which is a freshwater stream without any human interference.
Key words: Physiochemical parameters, Survival rate, Biomass production, Variation, Fluctuation, Mean body weight, Dissolved oxygen, Salinity.