Mizanur Rahman Washim^1,, AKM Shafiqul Alam Rubel¹, Md. Latiful Islam¹

This study ascertains the morphometric traits and meristic counts of Pomadasys hasta (Bloch 1790) in a mangrove fetched ecosystem (River Arpangasia) from south-west coast Bangladesh. A total of 83 specimens of P. hasta were sampled periodically from the River Arpangasia during July 2020 to June 2021, using cast net and seine net having a mesh size of 1.50-3.00 cm & ~2.50 cm, respectively. A magnifying glass was used to compute the fin rays. Seven distinct morphometric lengths were evaluated and body weight (BW) was measured for each individual. The explored fin formula was: D. XII/11-12; P1. 13-15; P2. I/5; A. iii/8-9; C. 18. Least and highest total length (TL) were 11.65 and 28.00 cm, whereas BWs were 81.60 and 446.34 g, respectively. Entire length-weight relationships (LWRs) were enormously significant (P < 0.001) with r² ≥ 0.949. Off the nine equations, BW = 0.0416*(TL) 2.77 was the most precise model based on the magnitude of r² value. Alongside, considering the r² values, TL vs. SL of length-length relationships (LLRs) was the classical model among eight equations. These data will aid to recognize the species and further assessment of stock/biomass and conservation of P. hasta in mangrove fetched river Arpangasia and other ecosystems of different geographic region.

Pomadays hasta, morphometric, meristic, mangrove, threatened fish