Abstract

The purpose of the present study is to know the reproductive characteristics of Octopus minor focusing on monthly variation of total weight and gonadosomatic index, fecundity, group maturity for management of the species resource effectively. Gonadosomatic index peaked June in females. The fecundity ranged from 89 eggs at 123.6 g to 200 eggs at 238.1 g of total weight. The relationship between total weight (TW) and fecundity (F) was $F=1.291TW^{0.908}$ ($r^2=0.85$) and fecundity increased with total weight. The relationship between mantle length (ML) and total weight (TW) was $TW=1.939ML^{1.991}$ ($r^2=0.82$) in female, $TW=1.566ML^{2.167}$ ($r^2=0.84$). The total weight at 50% group maturity was estimated to be 158.0 g for sex combine.