Length-weight relations for finfish species landed as trawl by-catch from north-western Bay of Bengal

For effective trawl by-catch management, length-weight relationships for seven data-deficient finfish species landed as by-catch in the trawl fishery (square meshed trawl cod-end of 40 mm) were documented from Visakhapatnam, along north-western Bay of Bengal during 2017–2019. Following precise taxonomic identification, total length and weight of each individual for each by-catch species were measured and the relationship parameters estimated. Slope or exponent of the relations ranged from 2.456 to 3.394, with coefficient of determination ≥0.90. Present information on length-weight relationship parameters is virgin globally for Leiodon cutcutia and Uranoscopus archionema; and for Jaydia lineata, Drepane punctata, Grammoplites scaber and Thryssa setirostris; they are first records from northern Indian Ocean