수산해양기술연구 (Journal of the Korean Society of Fisheries and Ocean Technology)

  • 제40권1호
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  • Pages.9-16
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  • 2004
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  • 2671-9940(pISSN)
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  • 2671-9924(eISSN)
한국수산해양기술학회 (The Korean Society of Fisheries and Ocean Technology)
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한국 거문도 인근해역의 만새우, Parapenaeopsis tenella의 개체군 동태

Population Dynamics of Smoothshell Shrimp, Parapenaeopsis tenella from the Coastal Area of Geomun-do, Korea

  • 발행 : 2004.02.01
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초록

우리나라의 서해와 남해 연안에 분포하는 민새우는 서해 북쪽으로는 영광에서 남쪽으로 거제도까지 널리 분포한다. 거문도 인근해역에서 채집된 민새우의 암 ${\cdot}$ 수 성비는 암컷이 48.6% 로 나타났고, 이 개체군은 7월과 8월에 성숙하고, 년 1 회 신생 가입군이 발생되었다. 교미한 개체는 7월과 8월에 출현하기 시작하였고, 갑각정 13mm 이상의 전 출현 암컷의 50% 이상이 교미한 것으로 나타났고, 성숙도지수는 7-8월에 최고치를 나타내었다. 암컷의 최소 성숙개체는 갑각장 11mm이고, 성 성숙과 교미율에 의한 군성숙도 ($CL_{50}$) 는 각각 갑각장 12.53mm와 12.28mm로 나타났다. 체장 빈도 자료에 의해 추정된 민새우의 수명은 암컷이 14-15개월로 나타났다. 변형된 von Bertalanffy 성장식에 의해 추정된 성장계수(K)는 암 ${\cdot}$ 수 각각 1.22/년과 2.00/년이고, 최대 갑각장 ($L_{\infty}$)은 암 ${\cdot}$ 수 각각 21.99mm와 15.00mm이였으며, 암컷이 수컷보다 성장이 빠르고, 큰 것으로 나타났다.

Parapenaeopsis tenella occurs widely on the south and west coasts of Korea. Sex ratio showed seasonal variations, with a mean value of 48.6% for the females. The species produces one cohort a year, with the ovaries ripening from July to August. Insemination took place from July to August, as more than half of the females sampled in the study over 14 mm CL were inseminated. Gonadosomatic index (GSI) reached the maximum between July and August. The smallest mature female was 11 mm CL. Size at 50% sexual maturity ($CL_{50}$), determined from both mature females and inseminated females, was 12.53 mm and 12.28 mm CL, respectively. The life span of females appeared to be 14-15 months according to size frequency distributions, while that of the male was 13-14 months. Population growth was estimated by the modified von Bertalanffy growth function incorporating seasonal variation in growth. Based on the growth parameters (K = 1.22 $yr^{-1}$ and $L_{\infty}$ = 21.99 mm CL for females, and K = 2.00 $yr^{-1}$ and $L_{\infty}$ = 15.00 mm CL for males) growth curves showed that females grew faster and reached a larger size at age than males.

키워드

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피인용 문헌

  1. Species composition and community structure caught by shrimp beam trawl in the marine ranching ground of Taean, Korea vol.49, pp.3, 2013, https://doi.org/10.3796/KSFT.2012.49.3.238
  2. Species Composition and Community Structure of Demersal Organisms Caught by Shrimp Beam Trawl in the Coastal Waters of Gunsan of West Sea vol.28, pp.1, 2016, https://doi.org/10.13000/JFMSE.2016.28.1.211