수산해양기술연구(구 한국어업기술학회지) 58권 2호 (p.113-120)

제주해역 참문어(Octopus vulgaris)의 어획실태와 생식생태

Catch and reproductive biology of common octopus Octopus vulgaris in the coastal waters of Jeju Island, Korea
키워드 :
Common octopus,Octopus vulgaris,Jeju Island

목차

서 론
재료 및 방법
결 과
   어획실태
   성비, 외투장, 체중의 변화
   생식소의 월별 발달과정과 생식소숙도지수 (GSI)
   성성숙 체중
고 찰
결 론
사 사
References

초록

The purpose of this study is to provide information about annual variations in catch size and changes in reproductive biology in the common octopus, Octopus vulgaris, a commercially important species in Jeju Island. Samples were collected from coastal waters of Jeju Island, Korea by coastal trap fishery from January to November 2021. Octopus vulgaris have been decreasing in this region since 1984. The mantle length (ML) ranged from 4.5 to 17.8 cm and body weight (BW) ranged form 88.5 to 2,657.5 g. A χ 2 -test revealed that the number of males was significantly greater than females (χ 2 = 32.712, df = 10, P<0.05). Mature females were found from January to July and male occurred January to August. The gonadosomatic index value was higher from July to August than other months. The relationship between mantle length and body weight was BW = 2.4527ML 2.3139 (female) and BW = 2.6785ML 2.3159 (male). At 50% group maturity, female and male average weight was estimated to be 554.7 g and 330.6 g, respectively.