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

The near-threatened Ailia coila, commonly referred to as Gangetic ailia, is a catfish species in the Ailiidae family that is indigenous to Bangladesh, Pakistan, Nepal, and India. This study describes the comprehensive explanation of life-history traits of Ailia coila, including length-frequency distribution (LFD), growth pattern (length-weight relationships, LWRsand length-length relationship, LLR), form factor (a3.0), condition factors (allometric, KA; Fulton’s, KF; relative, KRand relative weight, WR), size at first sexual maturity (Lm), optimum catchable length (Lopt) and natural mortality (Mw) from the Tetulia River in southern Bangladesh. Additionally, Lα, a3.0, Lm, Mwand Loptfrom various water bodies worldwide using the existing literature were calculated in this study. A total of 316 samples were randomly collected occasionally using traditional gear for a year from July 2021 to June 2022. With an accuracy of 0.01 cm and 0.01 g, each fish’s total length (TL), standard length (SL), and body weight (BW) were measured. The group from 10.00 to 10.99 cm TL was numerically leading and the bvalues of LWRsindicate positive allometric growth. The a3.0was 0.005 and KFwas the best for assessing the well-being of A. coila. Additionally, WRindicates that the habitat was imbalanced with higher predators. The calculated Lm, Loptand Mwwere 9.19 (~ 9.2 cm TL), 10.7 cm TL and 1.37 year−1for A. coilain the Tetulia River, respectively. These insights are vital for future research and recommending suitable management strategies for A. coilain the Tetulia River and neighboring basins.