Diversity of Fish in Mekong River, Nakhon Phanom Province

Abstract

The work aimed to survey of fish diversity in Mekong River, Nakhon Phanom province from 6 stations during March to December 2016. The results showed that 8,388 samples were classified into 11 orders 19 families 56 genera 82 species. The highest diversity was Cypriniformes consisted of 3 families 37 species. The second was Siluriformes consisted of 6 families 30 species. The third was Tetraodontiformes consisted of 1 families 4 species, followed by Anabantiformes, Clupeiformes and Synbranchiformes, respectively, with consisted of 1 families 2 species, each, the lowest diversity was Cichliformes, Gobiiformes, Osteoglossiformes, Pleuronectiformes and Spariformes, (1 species, each). Paralaubuca barroni had the highest Diversity Index as 10.464. Species Diversity Index and Richness Index was 3.342 and 8.855, respectively. In this study, endangered fish species of International Union for Conservation of Nature (IUCN) were found namely, Tenualosa thibaudeaui and Datnioides undecimradiatus. Moreover, vulnerable fish species of IUCN were found namely, Mekongina erythrospila and Pseudolais micronemus.