This study utilized over 20 years of daily bivalve harvesting records from a local fisherman on Yubudo Island to examine potential structural changes in bivalve resources as perceived by the local community following a distant oil spill event. Temporal analyses revealed that while Mactra quadrangularis was historically the dominant commercial bivalve, the harvest of Meretrix petechialis significantly increased after 2007. Notably, during a period of severe regional decline in Meretrix production across Chungcheongnam Province (2008-2012), Yubudo maintained relatively stable yields. These findings suggest that, amid widespread depletion of major bivalve resources due to pollution, there was a shift in local bivalve resource utilization from Mactra to the higher-value Meretrix in the Yubudo area, which was not directly impacted by contamination. This indicates that Yubudo may have served as a substitute production area during the regional decline in bivalve resources. This study is significant as it quantitatively demonstrates how large-scale regional changes in bivalve resources can indirectly influence local resource utilization by integrating long-term harvesting records with community perceptions.

Abstract
1. 서 론
2. 연구 방법
    2.1. 연구 대상지
    2.2. 유부도 갯벌 패류 생산량 추이 분석
    2.3. 충청남도 패류 생산량 추이 분석
3. 결 과
    3.1. 유부도 갯벌의 패류 생산량 추이
    3.2. 충청남도 패류 생산량과의 비교
    3.3. 유부도 백합의 월별 생산량 변화
4. 고 찰
적 요
CRediT authorship contribution statement
Declaration of Competing Interest
사 사
REFERENCES

• 박은수(국립생태원 생태신기술팀) | Eunsu Park (Ecological Technology Research, National Institute of Ecology, Seocheon 33657, Republic of Korea)
• 옥기영(국립생태원 생태신기술팀) | Giyoung Ock (Ecological Technology Research, National Institute of Ecology, Seocheon 33657, Republic of Korea) Corresponding author
• 박형근(영산강유역환경청 측정분석과) | Hyung-Geun Park (Monitoring and Analysis Division, Yeongsan River Basin Environmental Office, Gwangju 61945, Republic of Korea)