Koreoleptoxis nodifila (Martens, 1886) is an endangered species only living in the central and north streams of South Korea. However, there is a lack of information on physical habitat characteristics of K. nodifila. We aimed to determine preference ranges for water depth, current velocity, streambed substrate of K. nodifila. The weibull model was used to estimate the habitat suitability based on distribution of individual abundance by physical factors. Optimal depth preferences ranged from 0.53~17.17 cm, current preferences ranged from 48.40~81.03 cm s-1 and substrate (Φm) preferences ranged from - 4.36~ - 2.26. Median values of central tendency were determined as follows: water depth 16.73 cm, current velocity 65.23 cm s-1, substrate - 3.51. Mean values of central tendency were determined as follows: water depth 21.32 cm, current velocity 65.65 cm s-1, substrate - 3.63. Mode values of central tendency were determined as follows: water depth 5.17 cm, current velocity 64.77 cm s-1, substrate - 3.24. Based on the habitat suitability analysis, the microhabitat types of K. nodifila were determined as riffle and coarse-grained streambed.

Abstract
서 론
재료 및 방 법
    1. 염주알다슬기 포획 및 방사 허가
    2. 염주알다슬기 조사자료 수집
    3. 물리적 환경요인 측정
    4. 수학적 모형을 이용한 염주알다슬기의 물리적서식특성 분석
결 과
    1. 염주알다슬기의 시 · 공간적 출현 경향
    2. 수심
    3. 유속
    4. 하상기질
고 찰
적 요
REFERENCES

• 김진영(국립생태원 멸종위기종복원센터) | Jin-Young Kim (Research Center for Endangered Species, National Institute of Ecology)
• 김예지(경기대학교 생명과학과) | Ye ji Kim (Department of Life Science, Kyonggi University)
• 김아름(경기대학교 생명과학과) | Ah Reum Kim (Department of Life Science, Kyonggi University)
• 유인성(국립생태원 멸종위기종복원센터) | In-Seong Yoo (Research Center for Endangered Species, National Institute of Ecology)
• 김황(국립생태원 멸종위기종복원센터) | Hwang Kim (Research Center for Endangered Species, National Institute of Ecology)
• 공동수(경기대학교 생명과학과) | Dongsoo Kong (Department of Life Science, Kyonggi University) Corresponding Author