전자저널 > 전자저널 > Maturity and Spawning Period of the Common Octopus, Octopus vulgaris in the South Sea of Korea

Maturity and Spawning Period of the Common Octopus, Octopus vulgaris in the South Sea of Korea

Hyunjung Kang, Yeonghye Kim, Sungyeon Kim1, Dongwoo Lee2, Youngmin Choi, Daesoo Chang and Woo-Seok Gwak3

Fisheries Resource Research Department, National Fisheries Research and Development Institute, Busan 619-902, Korea 1Aquaculture Environment Institute, NFRDI, Tongyeong, Gyeongsangnam-do, 650-943, Korea 2Dokdo Fisheries Research Center, NFRDI, Pohang 79

The Common octopus, Octopus vulgaris is commercially important species in Korea. Korean fishing vessels have actively caught it. However, the study of this species has been poorly known. Therefore, the purpose of this study is to provide information about Maturation and Spawning period of this species. Samplings have been monthly collected in Tongyoung and Sacheon of Gyeongsangnam-do, using traps. A total of 748 individuals were sampled from February 2007 to January 2008. We analyzed monthly changes in maturity stages, gonadosomatic index, total weight at 50% group maturity. The octopus total weight was between 128.6 and 3381.4 g. Females were distributed between 129.8 and 3381.4 g and males between 128.6 and 2378.4 g. The spawning periods were May to June and September. The total weight at 50% group maturity was estimated to be 919.6 g.

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