Length-weight relationship and condition factor of 13 fish species collected from the Atrai and Brahmaputra rivers, Bangladesh
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2017, Vol 10, Issue 3
Abstract
Length-weight relationship (LWR) and condition factors (CFs) are imperative tools to discern the relative health condition of fishes. Using seine net, a total of 432 individuals (13 species) were collected from the Atari (Dinajpur) and Brahmaputra (Kurigram) Rivers of Bangladesh from January to June 2016. In LWR, isometric growth (b ≈ 3.0) were found for Amblypharyngodon mola, Lepidocephalichthys guntea and Xenentodon cancila, positive allometric growth (b < 3.0) were only recorded for Devario devario but another 9 fishes showed negative allometric growth (b > 3.0). No significant differences (p < 0.05) were scrutinized between observed body weight (BW) and standard body weight (BWs). But statistical differences (p < 0.05) were evaluated among the values of CFf (0.17±0.02-1.50±0.07) but not for BWr (99.77±1.87-101.80±3.29). Using the values of CFf and BWr, analysis of similarities (ANOSIM, p < 0.05) revealed that distances were recorded among fishes especially with X. cancila. Based on CFf and BWr values, X. cancila showed poor health condition and separated (stress < 0.01) from other fishes. A. mola, D. devario, Pethia ticto and Nandus nandus showed extended body shape (0.010 < a3.0 > 0.014) with more adaptability in these rivers than those of others. This is the first record for C. nama, D. devario and Parambasis ranga not recorded in Fish Base that would be the basis for upcoming research.
Authors and Affiliations
Md. Rashidul Islam, Md. Golam Azom, Md. Faridullah, Md. Mamun
Keywords
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