Length–weight relationships of seven small indigenous fish species from the Tapti River in peninsular India

Length–weight relationships of seven small indigenous fishes collected from the middle and lower stretch of the Tapti River in India were determined. The specimens were caught with drag nets (0 mm mesh size), gill nets (10–20 mm knot-to-knot mesh length) and scoop nets (0 mm) from the Maharashtra, and Gujarat state stretches of the Tapti River from November 2018 to December 2019. Digital calliper and digital balances were used to measure the total length (TL) and body weight (BW) of all fish specimens respectively. The growth coefficient b varied from 2.758 (Parambassis ranga) to 3.298 (Osteobrama cotio), and the LWRs were highly significant (p < .005). The present study established LWRs for the first time for seven fish species in the respective riverine habitat, including providing a new maximum length record for Corica soborna. The results of the present study will be useful for sustainable management and conservation of respective species in the river and its associated waterbodies

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Not AvailableA study was carried out to investigate the macrobenthic invertebrate community structure from the river Tapti from July 2017 to January 2020. A total of 49 taxa belonging to 2 phyla, 5 class, 17 orders, 26 families, and 31 genera were recorded from 13 sites of the river Tapti. Phylum Mollusca (58%) was the most dominant group followed by Arthropoda (42%) in the community structure. The species Tarebia lineatea and Bellamya bengalensis were the most abundant among the Gastropoda, Parreysia favidens and Corbicula striatella among the Bivalvia, and Caenis sp. and Chironomus sp. and among the Insecta. The frequency and relative frequency of the species revealed that the most dominant species was Bellamya bengalensis from the class Gastropoda. The data generated in the present study will be act as baseline information and would be useful in future studies for interpretation of the health of the Tapti river.ICAR-CIFR