Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Biological Properties of Common Squid in the Yellow Sea of Korea

황해에서 어획된 살오징어의 생물학적 특성

  • Choi, Kwang-Ho (Fisheries Resources Research Division, Korea National Fisheries Research and Development Institute) ;
  • Kwon, Dae-Hyeon (Fisheries Resources & Environment Division, West Sea Fisheries Research Institute)
  • 최광호 (국립수산과학원 자원관리과) ;
  • 권대현 (국립수산과학원 서해수산연구소)
  • Received : 2011.10.26
  • Accepted : 2011.12.26
  • Published : 2011.12.31
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Abstract

We investigated the biological characteristics of the squid, Todarodes pacificus Steenstrup through the samples caught monthly in the Yellow Sea($32^{\circ}$ 30'N, $122^{\circ}E-37^{\circ}$ 30'N, $127^{\circ}E$) from 1985 to 1987. Monthly mantle length frequency were separated into Autumn spawning group and winter spawning group with Tanaka's method(1956) to determine the main group of the squids caught in the Yellow Sea. The ratio of winter spawning group was higher than that of autumn spawning group. Monthly gonadosomatic index of females increased on July in 1985, on October in 1986, and October in 1987 and decreased later in each year. That of males increased on June in 1985, on July in 1986, and June in 1987. The length of 50% group maturity of female was 20.7 cm mantle length(ML) in 1985, 17.9 cm ML in 1986, and 17.2 cm ML in 1987. The ratio of female was higher than that of male in the group over 24 cm ML, and the ratio of male was higher than that of female in the group under 24 cm ML. We concluded that the length of 50% group maturity of squids was affected by the density of the population status.

1985년부터 1987년까지 황해 $32^{\circ}$ 30'N, $122^{\circ}E-37^{\circ}$ 30'N, $127^{\circ}E$ 해역에서 오징어채낚기어업으로 어획된 살오징어($Todarodes$ $Pacificu$s Steenstrup)를 매월 1회 채집하여 생물학적 특성치를 조사하였다. 황해에서 어획된 살오징어의 주 발생군을 판단하기 위해 Tanaka(1956)의 방법을 사용하여 가을과 겨울발생군으로 분리하였다. 겨울발생군의 비율이 가을발생군의 비율보다 높았다. 생식소 숙도지수(GSI) 월변화에서 암컷은 1985년에는 7월에, 1986년에는 10월에, 1987년에는 8월에 최고값을 나타낸 후 감소하였다. 수컷은 1985년에는 6월에, 1986년에는 7월에, 1987년에는 6월에 최고값을 보였다. 암컷의 50% 군성숙체장를 분석한 결과 1985년에는 외투장(ML) 20.7 cm, 1986년에는 17.9 cm, 1987년에는 17.2 cm로 나타났다. 암수비율은 ML 24 cm 이상 체급에서는 암컷의 비율이 높았으며, 24 cm 미만 체급에서는 수컷의 비율이 높았다. 살오징어의 군성숙체장은 개체군 상태에 의해 영향을 받는 것으로 판단된다.

Keywords

References

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