Structure of Fish Communities in Chi River Categorized by Trophic Levels: Trend and Variation
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Abstract
This study examined the structure of fish communities in the Chi River, as categorized by trophic levels, to compare and investigate trend of changes through various indices. Data from the catch per unit effort, (CpUE) during fishery monitoring surveys in the Chi River between 2008 and 2020 were used. It is found that at least 171 species of fishes inhabited in the Chi River, mostly belonging to Family Cyprinidae. The mean CpUE was 1.03 ± 0.20 kg per day. Species Richness averaged at 17 ± 2 species and the mean trophic level of fish in the community was 2.88 ± 0.09. The ratio of forage - to carnivorous - fishes (F/C ratio) was 3.25:1. The long term variation in CpUE, i.e. coefficient of variation, ranged from 62% to 72%. Absolute and relative short-term variations were between 60% - 73% and 67% - 76%, respectively. From the results, it could be concluded that the fish community structure in the Chi River was still balanced, but highly fluctuated in each trophic level. The results should be taken into consideration for further planning in fish resource management in the Chi River.
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บทความที่ได้รับการตีพิมพ์เป็นลิขสิทธิ์ของ วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยอุบลราชธานี
ข้อความที่ปรากฏในบทความแต่ละเรื่องในวารสารวิชาการเล่มนี้เป็นความคิดเห็นส่วนตัวของผู้เขียนแต่ละท่านไม่เกี่ยวข้องกับมหาวิทยาลัยอุบลราชธานี และคณาจารย์ท่านอื่นๆในมหาวิทยาลัยฯ แต่อย่างใด ความรับผิดชอบองค์ประกอบทั้งหมดของบทความแต่ละเรื่องเป็นของผู้เขียนแต่ละท่าน หากมีความผิดพลาดใดๆ ผู้เขียนแต่ละท่านจะรับผิดชอบบทความของตนเองแต่ผู้เดียว
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