The population variation of Spanish mackerel (Scomberomorus niphonius) according to its major prey abundance was analyzed using monthly catches of coastal set net fisheries in the southern waters off Gyeongsangnam-do and eastern waters off Gyeongsangbuk-do of Korea from 2006 to 2019. The abundance of Spanish mackerel and its prey species fluctuated almost simultaneously with time lags of +2 to -2 months between the set net fisheries in the southern and eastern waters. The generalized additive model revealed that the abundance of Spanish mackerel was influenced by its prey species such as hairtail and anchovy in southern waters, and common mackerel and horse mackerel in eastern waters. The model deviance explained 49% and 42% of Spanish mackerel abundance in southern and eastern waters respectively. These results suggest that the abundance of Spanish mackerel is affected by seasonal migratory prey fish species in the coastal areas and can be linked to their northerly migration.

Abstract
1. 서 론
2. 재료 및 방법
    2.1. 분석자료
    2.2. 회귀분석
3. 결 과
    3.1. 삼치와 먹이어종 어획량의 변동특성
    3.2. 삼치와 먹이 어종의 풍도 변동에 대한 회귀분석
4. 고 찰
    4.1. 어획 통계 자료와 통계모형
    4.2. 삼치와 먹이 어종간의 GAM 결과 비교
5. 결 론
REFERENCES

• 김진영(경북대학교 자연과학대학 수리융합연구소) | Jin Yeong Kim (Institute for Mathematical Convergence, Kyungpook National University) Corresponding author
• 김영순(경상국립대학교 정보통계학과) | Youngsoon Kim (Department of Information and Statistics division, Gyeongsang National University)
• 김희용(국립수산과학원 남해수산연구소) | Heeyong Kim (South Sea Fisheries Research Institute, National Institute of Fisheries Science)