Morphometric and Meristic Features of White Grunter, Pomadasys hasta (Bloch, 1790) a Threatened Fish in the South-west Coast, Bangladesh

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

¹Bangladesh Fisheries Research Institute, Brackishwater Station, Paikgacha, Khulna-9280, Bangladesh

Cite this paper:
Mizanur Rahman Washim, AKM Shafiqul Alam Rubel and Md. Latiful Islam. Morphometric and Meristic Features of White Grunter, Pomadasys hasta (Bloch, 1790) a Threatened Fish in the South-west Coast, Bangladesh. American Journal of Marine Science. 2021; 9(1):7-11. doi: 10.12691/marine-9-1-2

Abstract

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.

Keywords:
Pomadays hasta morphometric meristic mangrove threatened fish

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