Morphometric and Meristic Characteristics of Salmostoma bacaila (Hamilton, 1822) (Cyprinidae) from the Ganges River in Northwestern Bangladesh

Jordan Journal of Biological Sciences

Most. Farida Parvin¹ 

关键词: Salmostoma bacaila;    Morphometric;    Meristic;    Fin rays and scale;    Ganges River;    Bangladesh;   

DOI  :  

学科分类：生物科学（综合）

来源: Hashemite University, Deanship of Research and Higher Studies

【 摘 要 】

This study is performed for the determination of morphometric characters including length-weight relationships (LWRs) andlength-length relationships (LLRs) using 9 linear dimensions and meristic characteristics covering various fin-rays ofSalmostoma bacaila (Hamilton, 1822) from the Ganges River in northwestern (NW) Bangladesh. A total of 236 individualsof S. bacaila were collected occasionally from the Ganges River from July 2015 to June 2016, using traditional fishing gearsincluding a cast net (mesh size ranges: 1.5 - 2.5 cm), a gill net (mesh size ranges: 1.5–2.0 cm), and a square lift net (meshsize: ~2.0 cm). For each individual, a total of nine various lengths were measured nearest to 0.01 cm with digital slidecalipers, and the body weight was measured to the nearest 0.01g accuracy by an electronic balance. The LWRs werecalculated using the formula: W = a × Lb, where W is the body weight (g), L is the length (cm), and a and b are LWRsparameters. Fin-ray numbers from all fins as well as scales were computed by a magnifying glass. Total length (TL) variedfrom 5.9 -11.5 cm and the total body weight (BW) ranged from 1.31-8.8g. All LWRs were highly significant (p < 0.001)with r2 values ≤ 0.959. Based on r2 value, LWR by BW vs. TL (W= a × Lb) was the best fitted model among nine equations.In addition, the LLRs were also significant with r2 values ≤ 0.985. According to r2 value, LLR by TL vs. FL (TL = a + b×FL) was the best fitted model among eight equations. The fin formula of S. bacaila is: dorsal, D. 8-9 (2–3/6-7); pectoral, Pc.12 (2-4/8-10); pelvic, Pv. 8-9 (2–4/8-10); anal, An. 13-16 (2-4/10-13); caudal, Ca. 20–24 (6–7/14–17), respectively. Thisstudy would be very operative for species identification and stock assessment in the Ganges River of NW Bangladesh andthe contiguous ecosystems.

【 授权许可】

CC BY