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- 저자 : 오건희 ( Gun Hee Oh ) (검색결과 1 건)
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오건희 ( Gun Hee Oh ),유태식 ( Tae-sik Yu ),지창우 ( Chang Woo Ji ),박영석 ( Young-seuk Park ),곽인실 ( Ihn-sil Kwak ) 한국수산과학회 2023 한국수산과학회지 Vol.56 No.6
Droughts can alter the dynamics of aquatic ecosystems, including fish communities. This study compared the varia-tions in fish communities in Juam reservoir before and after drought events. Fish sampling was conducted five times from April 2021 to April 2023 using three different sampling methods (kick net, cast net, and gill net). The water level in the reservoir reached its peak (103.73 EL.m, 62.2% capacity) in September 2021, before the drought, and dropped to its lowest point (88.84 EL.m, 17.6% capacity) in April 2023. The dissolved oxygen content in the reser-voir decreased from 27 to 6.3 mg/L between the period with the lowest water level (April 2023) and the period with the highest water level (September 2021). In September 2021, 466 fish were collected, but after one year of drought, the number of individuals decreased to 105. Further, the number of fish collected and water levels were positively correlated. Dominant species exhibited a population decline of over 60% with decreasing water levels. These findings highlight the importance of fishery resource management during drought periods.
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