Abstract
Fish diversity of Bangshi river, Savar, Dhaka was studied over a period of two consecutive years (July, 2010 to June, 2012). A total of 48 fish species belonging to 39 genera, 18 families and 8 orders were recorded. Siluriformes was the most dominant order comprising 33.33% of all the number of species recorded, followed by the Cypriniformes (31.25%), Perciformes (14.58%), Clupiformes (6.25%), Channiformes (6.25%), Osteoglossiformes (4.16%), Synbranchiformes (2.08%) and Beloniformes (2.08%). The most dominated species of this study were Ailia punctata, Mystus tengra and Puntius sophore and rare species was Bagarius yarrellii. During the study 29 sp. (40.42%) fish species were found to be locally rare, whereas, only 3sp. (6.25% ) were very common and 16 sp. (33.33%) were common in occurrence. Among the fishes, 52.08% was threatened in which vulnerable, endangered and critically endangered were 20%, 36% and 44% respectively.Jahangirnagar University J. Biol. Sci. 4(1): 19-25, 2015 (June)
Highlights
Fish biodiversity of a river essentially represents the fish faunal status and their abundance
All collected data were used to calculate “Relative Abundance” of a particular fish species” by following the method of Jadhav et al (2011) with slight modification i.e., the relative abundance of the fish was classified into three categories namely Very common (67-100%), Common (34-66%), and Rare (1-33%) on the basis of their availability in total catch
The percentage distribution of fish species under respective orders suggest that the Siluriformes was the most dominant order comprising 33.33% of all the number of species recorded followed by the Cypriniformes (31.25%), Perciformes (14.58%), Clupiformes (6.25%), Channiformes (6.25%), Osteoglossiformes (4.16%), Synbranchiformes and Beloniformes of each 2.08% (Fig. 2)
Summary
Fish biodiversity of a river essentially represents the fish faunal status and their abundance. All collected data were used to calculate “Relative Abundance” of a particular fish species” by following the method of Jadhav et al (2011) with slight modification i.e., the relative abundance of the fish was classified into three categories namely Very common (67-100%), Common (34-66%), and Rare (1-33%) on the basis of their availability in total catch.
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