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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Maturation and growth of Trachysalambria curvirostris in the coastal water of Geomundo, Korea

한국 거문도 인근해역의 꽃새우, Trachysalambria curvirostris의 성숙과 성장

  • Published : 2003.05.01
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Abstract

In Korea, Trachysalambria curvirostris occurs widely along the south and west coasts with a range extending from Kanghwado in the northwest down to Sarangdo in the southeast. Sex ratio showed seasonal variations, with a mean value of 48.6% for the females. T. curvirostris produces one cohort a year, with the ovaries ripening from July to August. Insemination appeared to take place from June to August, as more than half of the females sampled in the study of over 19 mm carapace length were inseminated. The mean gonado somatic index (GSI) reached a maximum between July and August. The smallest mature female found was a 18 mm carapace length (CL). Size at 50% sexual maturity (CL$_(50)$), determined from both mature females and inseminated females was 18.89 mm and 19.91 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 = 1.40 yr$_(-1)$ and L$L\infty$ = 29.54 mm CL for females, and K = 2.00yr$_(-1)$ and L$L\infty$ = 18.95 mm CL for males) growth curves showed that females grew faster and reached a larger size than males.

우리 나라의 서해와 남해 연안을 분포하는 꽃새우는 북쪽으로는 강화도에서 남쪽으로 사랑도까지 널리 분포한다. 본 연구에서 대상으로 한 거문도 인근해역 꽃새우의 암ㆍ수 성비는 암컷이 48.6%로 나타났고, 이 개체군은 7월과 8월에 성숙하고, 년 1회 신생 개체군이 발생되었다. 교미한 개체는 7월과 8월에 출현하기 시작하고, 갑각장 19 ㎜ 이상의 암컷에서는 반 이상이 교미한 것으로 나타났으며, 숙도지수는 7-8월에 최고치를 나타내었다. 암컷의 최소 성숙개체는 갑각장 18 ㎜이고, CL/sub 50/ 성 성숙체장과 교미체장은 각각 갑각장 18.89 ㎜와 19.19 ㎜로 나타났다. 체장 빈도 변화에 의해 추정된 거문도 개체군의 수명은 암컷 14-15개월이고, 수컷은 13-147개월 나났다. 변형된 von Bertalanffy 성장식에 추정된 성장계수(K)는 암ㆍ수 각각 1.40/년과 2.00/년이고, 최대 갑각장(L/sub ∞/)은 암ㆍ수 각각 29.54 ㎜와 18.95 ㎜이었으며, 암컷이 수컷 보다 성장이 빠르고, 큰 것으로 나타났다.

Keywords

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