A study on fish species composition and catch per unit effort (CPUE) was conducted at the Nong Han wetland in
Sakon Nakhon Province, Thailand. Fish were collected with 3 randomized samplings per season at 6 stations using 6 sets of
gillnets. A total of 45 fish species were found and most were in the Cyprinidae family. The catch by gillnets was dominated by
Parambassis siamensis with an average CPUE for gillnets set at night of 807.77 g/100 m2/night. No differences were detected on
CPUE between the seasonal surveys. However, the CPUEs were significantly different (P<0.05) between the stations. The Pak
Narmkam station had a higher CPUE compared to the Pak Narmpung station (1,609.25±1,461.26 g/100 m2/night vs.
297.38±343.21 g/100 m2/night). The results of the study showed that the Nong Han Wetlands is a lentic lake and the fish
abundance was found to be medium. There were a few small fish species that could adapt to living in the ecosystem.
Keywords
fish species, fish composition, abundance, CPUE, Nong Han wetland
SONGKLANAKARIN JOURNAL OF SCIENCE & TECHNOLOGY
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