This study is aimed to figure out the productivity and variability of cage-aquaculture changes. According to the analysis, the productivity of major fish species has been increasing, except mullet. Although the regional productivity has decreased in the last two years, it has been on the rise considering as a whole. Gyeongsangnam-do showed the highest level of productivity by region. Productivity by species was also higher than other regions in the cases of rock fish, mullet and sea bream followed by productivity of Chungcheongnam-do. The production of marine cage-culture in Jeollanam-do is the second largest in Korea in value/weight while its productivity is lower than that of Chungcheongnam-do. When it comes to comparison by region, Gyeongsangnam-do shows the lowest productivity variation. And Jeollanam-do shows the second-lowest variation in productivity that is only about half of that of Chungcheongnam-do province. Thus, it is found that Jeollanam-do region has an advantage in management stability while its productivity is low. On the other hand, productivity by species was also analyzed. Gyeongsangnam-do has the highest productivity by species for rock fish, mullet and sea bream whereas rock bream productivity is the highest in Jeollanam-do. Therefore, it probably needs to reflect these results when choosing regional-focused incubation fish species.

Abstract
I. 서 론
Ⅱ. 해상가두리 어류양식업 현황
    1. 면허 및 면적
    2. 지역별 생산량 및 생산금액
    3. 어종별 생산량 및 생산금액
Ⅲ. 분석방법과 기초자료
    1. 선행연구 및 분석방법
    2. 분석자료
Ⅳ. 분석결과
    1. 지역별 생산성 분석결과
    2. 어종에 따른 지역별 생산성 분석결과
    3. 지역별ㆍ어종별 생산성 변동 폭 분석결과
Ⅴ. 결 론
REFERENCES

• 김수현(한국해양수산개발원) | Soo-Hyun Kim (Korea Maritime Instute)
• 김대영(한국해양수산개발원) | Dae-Young Kim (Korea Maritime Instute) Corresponding author