This study aimed to examine the morphological characteristics and variation in main traits by comparing the growth of individuals of Ecklonia cava Kjellman (Laminariales, Phaeophyceae) under an aquaculture environment. This survey was conducted from April 2018 to November 2019 at the aquafarm in Jindo-gun, Jeollanam-do (South coast of Korea). To classify the morphology of individuals in the aquaculture farm of E. cava, we investigated fourteen morphological characteristics and calculated four ratios between the measured values. Juvenile individuals showed a simple or oblong lanceolate, and at 3-4 months, a short stipe and holdfast developed, along with a bladelet that developed into the secondary blade form. At 5-7 months, secondary blades were found to develop irregularly on the primary blade. At 8-10 months, the primary blade expanded and secondary blades elongated. At 11-12 months, the secondary blades became oblong. At 13-14 months, the thallus area expanded. At 15-16 months, tertiary blades were formed, the thallus became more complex, the stipe thickened, and the holdfast widened. At 17-18 months, secondary blades clearly developed along with lobes. At 19-20 months, tertiary blades developed and became similar to mature natural blades. In the principal component analysis (PCA), the monthly population of the first year (Q1) and that of the second year (Q2) of the cultured population were divided along PC1, which is related to secondary blade morphological characteristics and the holdfast width. Q2 and natural populations are distributed in descending order of volume in Jeju (J), East Coast (E), and South Coast (S) along PC2, which is related to primary blade and stipe morphological characteristics. The results of this study were judged to offer important criteria for the development of different varieties of E. cava.

1. 서 론
2. 재료 및 방법
    2.1. 양식 및 형태 형질 측정
    2.2. 양식 개체군 형질 상관분석 및 생장률
    2.3. 통계분석: 주성분분석과 일원분산분석
3. 결과 및 고찰
    3.1. 감태 양식 개체군 형태 월 변화
    3.2. 감태 양식 개체군 생장률
    3.3. 감태 양식-자연 개체군 비교
적 요
CRediT authorship contribution statement
Declaration of Competing Interest
사 사
REFERENCES

• 김승오(국립수산과학원 해 조류연구소) | Seung-Oh Kim (Seaweed Research Institute, National Institute of Fisheries Science, Haenam 59002, Republic of Korea)
• 유현일(국립수산과학원 수 산식물품종관리센터) | Hyun Il Yoo (Aquatic Plant Variety Center, National Institute of Fisheries Science, Mokpo 58746, Republic of Korea)
• 허진석(국립수산과학원 해 조류연구소) | Jin Seok Heo (Seaweed Research Institute, National Institute of Fisheries Science, Haenam 59002, Republic of Korea)
• 전시현(국립수산과학원 수 산식물품종관리센터) | Si Hyun Jeon (Aquatic Plant Variety Center, National Institute of Fisheries Science, Mokpo 58746, Republic of Korea)
• 이상래(부산대학교 해양연구소) | Sang-Rae Lee (Marine Research Institute, Pusan National University, Busan 46241, Republic of Korea)
• 옥정현(부산대학교 해양연구소) | Jung Hyun Oak (Marine Research Institute, Pusan National University, Busan 46241, Republic of Korea) Corresponding author