Length-weight relationship and relative condition factor of five indigenous fish species from Torsa River, West Bengal, India

Abstract

SummaryLength-weight relationships (LWRs) for five indigenous fish species under five genera and two families, namely Cyprinion semiplotum (McClelland, 1839), Barilius barna (Hamilton, 1822), Barilius barila (Hamilton, 1822), Gagata sexualis Tilak, 1970 and Pseudolaguvia shawi (Hora, 1921) were studied from Torsa River in West Bengal, India.Sampling was done at quarterly intervals from November, 2015 to December, 2016 and a total of 701 fish specimens were collected using cast nets (mesh size of 15-20 mm), gill nets (mesh size 20-35 mm) and bamboo traps. In the present study, b value ranges from 2.686 to 3.268. LWRs for these fish species (except P. shawi) have not been reported in FishBase. A new maximum length has been recorded for P. Shawi and G. sexualis. The relative condition factor (Kn) values was found to range from 1.004 to 1.028.

Length-weight relationship and relative condition factor of five Labeo spp. from river Cauvery in India

“…LWRs can be used to convert length-frequency observations to biomass estimates while modelling an aquatic ecosystem (Kulbicki et al, 2005) and in converting length data obtained from back calculations on otoliths and scales. LWRs of other freshwater fishes from Indian rivers were previously reported by Baitha et al (2018), Borah et al (2018), Koushlesh et al (2018), Baitha et al (2017) and Nath et al (2017). The relative condition factor for L. calbasu, L. bata, L. rohita, L. dyocheilus and L. porcellus were estimated as 1.019± 0.023, 1.001 ±0.011, 1.013 ± 0.021, 1.005 ± 0.023 and 1.003 ±0.017, respectively (Table 2).…”

Length-weight and length-length relationships of eight fish species from river Ganga, India

“…Recently, numerous attempts are made to study LWRs as well as LLRs of indigenous freshwater fish species from Indian waters Borah et al, 2017;Koushlesh et al, 2017;Nath et al, 2017;Sandhya et al, 2016). However, there is a lack of studies on LWRs for fishes of the River Ganga (largest river in India and fifth longest in the world), hence, this study contributes such estimates for eight species.…”

“…LWR is also partly an important parameter for fish stock and population assessments (Chu, Hou, Tsong‐Ueng, & Wang, ; Ruiz‐Campos, Gonzalez‐Acosta, & Cruz‐Aguero, ). Recently, numerous attempts are made to study LWRs as well as LLRs of indigenous freshwater fish species from Indian waters (Baitha et al, ; Borah et al, ; Koushlesh et al, ; Nath et al, ; Sandhya et al, ). However, there is a lack of studies on LWRs for fishes of the River Ganga (largest river in India and fifth longest in the world), hence, this study contributes such estimates for eight species.…”

Length-weight and length-length relationship of two endemic snakehead fish species from Brahmaputra river basin, Assam, India

“…Studies on LWR and LLR are important aspects of fisheries management (Froese, Tsikliras, & Stergiou, ; Moutopoulos & Stergiou, ). As a result, attempts have been made recently to study LWRs and LLRs of indigenous fish species from inland water bodies of India (Baitha et al., ; Borah et al., ; Karna, ; Koushlesh et al., ; Nath et al., ; Sandhya et al., ). Channa aurantimaculata (type locality: Dibrugarh, Assam) is endemic to Assam and found in forest streams, ponds and swamps adjacent to the Brahmaputra River in subtropical rainforest conditions (Musikasinthorn, ) while C. stewartii (type locality: Cachar, Assam) is endemic to Brahmaputra river basin of India and the Ganges River basin from southern Nepal (Bhattacharjya, Choudhury, & Sugunan, ; Musikasinthorn, ; Playfair, ; Talwar & Jhingran, ).…”