Maturity and spawning of the Octopus longispadiceus was investigated based on the samples collected in the East Sea. We analyzed monthly changes in maturity stage, gonadosomatic index (GSI), eggs diameter, fecundity and body weight at group maturity. Mature stages appeared every month, and GSI values were high every month. Spawning season was estimated to be year-round, and main spawning occurs intensively in sping and fall. The eggs diameter of mature stage was 19.2 ± 3.0 mm. The total number of eggs in the fecundity ranged from 31 eggs in 189 g (BW) to 184 eggs in 1,013 g (BW), which was proportional to body weight (BW), and the relationship between total weight and fecundity was F = 0.7593 × BW0.7719 (R2 = 0.7462). The percentages of sexually mature females estimated using a logistic equation were over 50% at 323.4 g BW, 75% at 451.4 g BW and 97.5% at 750.3 g BW, respectively. We think that it be good way for Octopus longispadiceus to be regulated by fishing gear and fishing method.

서 론
재료 및 방법
결 과
    체중조성
    산란기 추정
    난경 및 포란수
    성숙체중
결 론
사 사
References

• 양재형(국립수산과학원 연근해자원과 연구원) | Jae-Hyeong YANG (Researcher, Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science, Busan 46083, Korea)
• 이수정(국립수산과학원 서해수산연구소 연구원) | Soo-Jeong LEE (Researcher, West Sea Fisheries Research Institute, National Institute of Fisheries Science, Incheon 22383, Korea)
• 서영일(국립수산과학원 독도수산연구센터 연구원) | Young Il SEO (Researcher, Dokdo Fisheries Research Center, National Institute of Fisheries Science, Pohang 37709, Korea)
• 백정익(국립수산과학원 동해수산연구소 연구원) | Jeong-Ik BAEK (Researcher, East Sea Fisheries Research Institute, National Institute of Fisheries Science, Gangneung 25435, Korea) Corresponding author