한국수산과학회

ISSN NUMBER

  • pISSN : 2234-8395
  • |
  • eISSN : 2234-1757

Open Access Journal

UTIL MENU



SEARCH FOR ARTICLE

검색

kfas, vol. 53, no. 1, pp.57-66, February, 2020
DOI. https://doi.org/10.5657/KFAS.2020.0057

Variation in Catch Size and Changes in Reproductive Biology of Common
Octopus Octopus vulgaris in the Coastal Waters Off Gyeongnam, Korea
경남 지역에서 서식하는 참문어(Octopus vulgaris)의 자원 변동과 생식
생태의 변화

송세현·박종혁·지환성·최정화·김희준·정재묵*·김도훈1
국립수산과학원 수산자원연구센터, 1부경대학교 해양수산경영학과

The purpose of this study was to provide information about annual variations in catch size and changes in reproductive
biology in the common octopus Octopus vulgaris, a commercially important species. Samples were collected
from coastal waters off Gyeongnam, Korea, by coastal trap and coastal complex fishery from February to December
2018. Octopus vulgaris have been decreasing in this region since 2007 and catch prices have been increasing. The
mantle length (ML) of O. vulgaris ranged from 1.2 to 21.2 cm and body weight ranged from 42.6 to 5,537 g. The sex
ratio differed significantly from what was expected, at 0.45:0.55 (P<0.05). Mature females were found from February
to December, except in October and November, and males occurred from February to December, except in October.
The gonadosomatic index value was higher from May to September than in other months. The total number of eggs
in fecund individuals ranged from 40,280 in 578.1 g of body weight to 138,994 in 1,666.5 g of body weight. The
relationship between body weight and fecundity was F=76.486BW1.0087 (r2=0.7897). At 50% group maturity, average
weight was estimated to be 636.35 g, while it was 969.30 g at 75% maturity and 1736.55 g at 97.5% maturity. This
study highlights changes in catch size and reproductive biology between 2007 and 2018. These results provide basic
evidence that may be used to establish regulatory policy for O. vulgaris fisheries.

Keyword : Octopus vulgaris, Reproductive biology, Octopus catch, Coastal waters off Gyeongnam

Download :


Copyrightⓒ 2014 The Korean Society of Fisheries and Aquatic Science
All Rights Reserved.

Editorial Office Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 608-737, Korea TEL : 82.51.629.7363 | FAX : 82.51.626.1039 | E-mail : kosfas@naver.com