The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Distribution of the Common Squid Todarodes pacificus Paralavae in the Southern Coastal Waters in the East Sea in August and September 2013

2013년 8월, 9월 동해 남부연안 살오징어 유생 분포

  • Kim, Yoon-Ha (Department of Oceanography, Pukyung National University) ;
  • Moon, Chang-Ho (Department of Oceanography, Pukyung National University) ;
  • Lee, Chung Il (Department of Marine Bioscience, Gangneung-Wonju National University)
  • 김윤하 (부경대학교 해양학과) ;
  • 문창호 (부경대학교 해양학과) ;
  • 이충일 (강릉원주대학교 해양자원육성학과)
  • Received : 2014.07.14
  • Accepted : 2014.08.14
  • Published : 2014.08.28
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Abstract

Paralarvae of the common squid, Todarodes pacificus Steenstrup were sampled with the bongo net (diameter: 60 cm, mesh: $333{\mu}m$) by using oblique tow method with the oceanographic research vessel (Tamgu 12) at 21 stations along the southwestern coastal waters of the East Sea in August and September, 2013. Paralarvae were collected 16 ind./$10m^3$ in August and 7 ind./$10m^3$ in September at approximately, and bottom depth was from 70 m to 500 m. Mantle length of paralarvae was from 1.7 to 6.0 mm. Paralavae were distributed mainly in offshore stations in August and near by Cape Janggi in September. Optimum embryo survival temperature ($18-24^{\circ}C$) was formed shallower than 35 m depth for almost stations where paralarvae were existed, and survival temperature ($15-24^{\circ}C$) for embryo stage was located shallower than 75 m.

동해연안에서 살오징어(Todarodes pacificus) 유생 분포를 파악하기 위해 2013년 8월과 9월 해양조사선 탐구 12호로 21정점에 대해 CTD 관측 및 지름 60 cm, 망목 $333{\mu}m$의 봉고네트를 이용한 복경사 채집을 하였다. 유생은 8월에 3개 정점에서 16 개체/$10m^3$, 9월에 1개 정점에서 7 개체/$10m^3$가 출현하였으며, 유생이 채집된 정점의 수심은 약 70 m-500 m 사이였다. 유생의 외투장은 1.7-6.0 mm였으며, 8월에는 주로 외양측 정점, 9월에는 장기갑 부근 정점에서 채집되었다. 배아발달과 유생이 생존하기에 가장 적합한 수온인 배아생존최적수온($18-24^{\circ}C$)은 35 m보다 깊지 않았고, 배아와 유생의 생존이 가능한 수온($15-24^{\circ}C$)은 75 m보다 얕은 수심에 분포하였다.

Keywords

References

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