화합물안정동위원소 분석법을 활용한 낙동강 이입종 강준치 Chanodichthys erythropterus의 영양단계 해석

서지정보

ㆍ발행기관 : 한국하천호수학회 ㆍ수록지정보 : 생태와 환경 / 56권 / 3호
ㆍ저자명 : 원은지, 조하은, 김도균, 최지웅, 안광국, 신경훈

목차

서 론
재료 및 방 법
1. 조사지점
2. 어류 시료 채집 및 보관
3. 정점별 공서 우점종 및 먹이 후보종의 우점도
4. 안정동위원소비 분석
5. 영양단계 (Trophic position, TP) 산출
6. 통계분석
결과 및 고 찰
1. 낙동강 서식 강준치의 안정동위원소비와 영양단계
2. 크기에 따른 영양단계 (TP)의 변화
3. 강준치의 먹이 선택성
결 론
적 요
사 사

영어 초록

Invasive predators are one of the most damaging species groups to biodiversity. In the Nakdong River, the lake skygazer Chanodichthys erythropterus is a dominant species that is fiercely carnivorous and a concern for commercial fish. Although it is important to understand the ecological characteristics related to the feeding habit, studies on the diets of lake skygazer in Nakdong River have been limited to studies of gut contents. In this study, the trophic position (TP) and feeding habits of C. erythropterus were studied by calculating TPs using samples collected from 13 sites throughout the Nakdong River. Compound-specific isotopic analysis of amino acids provided reliable TPs from the muscle of Lake skygazer C. erythropterus without any isotope baseline. The results were approximately 3 to 3.6 and suggesting a carnivorous but size-dependent prey variation. In particular, the TP variability of C. erythropterus observed in the Nakdong River showed that it had a selective feeding habit compared to carnivorous fish species of relatively similar trophic levels.

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