Sujata Dutta, Ravinder Singh & Nitish Kumar Mahato*
P. G. Department of Zoology, Kolhan University, Chaibasa, Jharkhand, India
Received : 15th December, 2023 ; Revised : 17th January, 2024
DOI:-https://doi.org/10.5281/zenodo.14432519
Abstract– Fish farming in lentic ecosystems can provide a valuable source of food and income while minimizing pressure on wild fish populations. Dimna lake which is situated at latitude 22.7971 and longitude 86.18175 is an important source of fish farming and drinking water in and around Jamshedpur, Jharkhand, India. This lake is spread over an area of 36 hectares and is about 13 kms from the main town. Jayanti Sarovar is another lake situated at latitude 22.80975 and longitude 86.18775 in the main town. It covers an area of 40 acres. In the present study, comparative study of fish diversity along physicochemical analyses of water samples from both the lakes are being reported. The physicochemical analyses regarding water temperature, pH, turbidity, transparency, dissolved O2, free CO2, alkalinity, hardness, carbonate, bicarbonate, chloride, phosphate, silicate, Na+, K+, Ca++, Mg++ were performed seasonally. The diversity of fishes was studied during the period March 2019 to December 2021. The water temperature and pH of Dimna Lake ranges from 33.0oC to 19.6oC and 7.8 to 7.6, respectively. Dissolved O2 and free CO2 content were found to be 5.9 mg L-1 to 6.5 mg L-1 and 3.5 mg L-1 to 4.5 mg L-1, respectively. Hardness of water ranges from 122 mgL-1 to 147 mgL-1. On the other hand, water temperature and pH of Jayanti Sarovar ranges from 19.0oC to 33.5oC and 7.8 to 7.9, respectively. Dissolved O2 and free CO2 content of this lake were found to be 6.7 mg L-1 to 9.2 mg L-1 and 5.6 mg L-1 to 21.0 mg L-1, respectively. Hardness of water ranges from 89.0 mgL-1 to 127.0 mgL-1. Fish diversity of Dimna Lake include members belonging to class Actinopterygii consisting of five families, six orders, 12 genera and 19 species. Highest species composition was observed in Cyprinidae family followed by Cichlidae, Claridae and Siluriformes families. Fishes belonging to class Actinopterygii consisting of three families, two orders, five genera and seven species were recorded from the Jayanti Sarovar. Highest species composition was observed in Cyprinidae family followed by Claroteidae. Thus, the fish diversity of Dimna Lake is more diverse as compared to Jayanti Sarovar. Both physicochemical parameters and diversity of fish indicate that this lentic ecosystem is well suited for fish culture and farming.
Key words: Fish diversity, physicochemical, Actinopterygii, Cyprinidae, Cichlidae.
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