Length-Weight Relationships of Eighteen Species of Freshwater Fishes From Panchet Reservoir in Ganges Basin, Jharkhand, India

Abstract

The present study describes the length-weight relationships (LWRs) of 18 fish species from a large tropical reservoir, Panchet, in the Damodar River basin, one of the main tributary of the largest river Ganga in India. A total of 2419 individuals represented by 18 species belonging to 9 families were sampled between November 2014 and June 2016. The b values ranged from 2.469 for Trichogaster chuna to 3.428 for Ailia coila. All the regressions were highly significant (p<0.001). The results revealed positive allometric growth for seven species (b>3, p<0.05), negative allometric growth for seven species (b<3, p<0.05) and isometric growth for four species (b=3, p>0.05). This study represents the first reference on the length-weight relationship of Trichogaster chuna from a reservoir ecosystem. This is the first report on LWRs of five fish species viz., Puntius terio, Pethia conchonius, Sperata seenghala, Ailia coila and Trichogaster chuna from an Indian reservoir. This study provides basic data for future stock assessment studies and management programmes from Panchet Reservoir as well as for complementing the comparisons of LWRs from other ecosystems.

Life History Traits of Gangetic Ailia Ailia coila (Hamilton 1822) in the Tetulia River, Southern Bangladesh

“…In this scenario, the estimated b value of the LWRs (TL vs. BW) was 3.18, indicating that the population precisely follows the growth in a positive allometric pattern. Parallel research findings (b = 3.42) were observed from Panchet Reservoir in the Ganges basin, Jharkhand, India (Sandhya et al, 2020), from the Brahmaputra River, Assam, India (b value was 3.19 for males) (Gogoi et al, 2019) and ponds along the Ganges Varanasi (b = 3.65) (Mahapatra et al, 2018). An isometric growth pattern was observed (b = 3.07) in the Padma River in northeastern Bangladesh (Hossain, 2010).…”

“…The river also plays an important role in the economic well-being of the people and in alleviating poverty by creating employment opportunities . There is no report on the study of the nutrientrich A. coila from the Tetulia River, although some scientific studies on length-weight relationship, condition factor, biometric analysis and mortality parameters (Hossain et al, 2009;Hossain, 2010;Mortuza and Al-Misned, 2015;Deori et al, 2017;Mahapatra et al, 2018;Gogoi et al, 2019;Mortuzaet al, 2020;Sandhya et al, 2020;Gogoi et al, 2021) have been conducted on this species. However, there are still no detailed scientific studies on the whole life history with a special focus on this species, which attracted our attention.…”