Freshwater Fish Community Structure in the Flood Swamp of the Mahali River Belilik Village Namang District

Abstract

Flood swamp is a very diverse ecosystem, both spatially and temporally. As part of a river ecosystem, this area is characterized by water fluctuations between the dry and rainy seasons that vary throughout the year. The swamp has a diversity of species and the potential and production of freshwater fish is quite high. The research objectives taken in this study are as follows, knowing the types of freshwater fish in the Mahali River Flood Swamp, analyzing the structure of the fish community in the Mahali River Flood Swamp, analyzing the relationship between physical and chemical factors of waters to the fish community in the Mahali River Flood Swamp, The research method uses the exploration method and for analysis using PCA analysis (Principal Component Analysis). The results obtained were 9 families and 17 species consisting of Hemibagrus nemurus, Notopterus notopterus, Channa striata, Belontia hasselti, Pristolepis grooti, Nandus nebulosus, Struntius lineatus, Cyclocheilichthys apogon, Channa lucius, Clarias niehofii), Kryptopterus lais, Trigonopoma pauciperforatum, Rasbora einthovenii, Betta edithae, Channa micropeltes, Channa bankanensis and Puntius pentazona. The index value of the Diversity index (H') has a value ranging (2.05 - 2.35), the Uniformity index (E) has a value ranging (0.77 - 0.83) and the Dominance index (C) has a value ranging (0.13 - 0.20). The results of PCA analysis of fish species diversity on environmental characteristics in the Mahali River Banjiran Swamp are positively correlated with the values of brightness, depth, pH, temperature and negatively correlated with DO and phosphate.