Fisheries Biology of Octopus minor in the Deukryang Bay in the Southern Coast of Korea
Seung Hwan Lee, Min Gyu Shin and Yeonghye Kim
Fisheries Resources and Environment Division, South Sea Fisheries Research Institute, National Institute of Fisheries Science, Yeosu 59780, Korea.
The purpose of the present study is to get information on the reproductive characteristics of Octopus minor, especially focusing on monthly variations in mantle length and gonadosomatic index, sex ratio, fecundity, group maturity for the effective management of this biological resource. Gonadosomatic index showed a peak between July and September in females. The fecundity ranged from 97 to 213 eggs with the total weight of 96.8 g and 270.7 g, respectively. There was a good relationship between total weight (TW) and fecundity (F): F = 2.937TW0.752 (r2 = 0.80). The mantle length (ML) and total weight (TW) showed also a relationship: TW = 0.702ML2.417 (r2 = 0.72) in female, and TW = 0.605ML2.539 (r2 = 0.74) in male. The sex ratio (female/male) of O. minor was 1/0.85 (female 54.0%) showing predomination of female.
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