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Reproductive Biology and Population Dynamics of Latreutes planirostris in the South-Western Waters of Korea

한국 서해남부 해역에 분포하는 넓적뿔꼬마새우(Latreutes planirostris)의 생식생태 및 개체군 동태

  • OH Chul-Woong (Department of Marine Resources, Mokpo National University) ;
  • NA Jong-Hun (Department of Marine Resources, Mokpo National University) ;
  • MA Chae-Woo (Department of Biological Resources, Soonchunhyang University)
  • 오철웅 (목포대학교 해양자원학과) ;
  • 나종헌 (목포대학교 해양자원학과) ;
  • 마채우 (순천향대학교 해양생물공학부)
  • Published : 2003.04.01

Abstract

Reproductive biology and population dynamics of Latreutes planirostris were investigated on the south western waters of Korea from June 2001 to May 2002. This paper describes sex ratio, population growth, and reproductive aspects of Latreutes planirostris. Brood size was an isometric function of female carapace length. Based on dry weight, reproduction effort (mass of eggs/mass of female) averaged 0.23. Ovarian examination showed that there was significantly higher gonadosomatic index from May to September, with a peak in June. Statistical analysis revealed that the ovarian dry weight of females with eyed eggs was significantly higher than that of those with non-eyed eggs. This suggests that females were potentially consecutive breeders. Sex ratio showed that female is more numerous than male. Growth parameters mortality and recruitment were estimated by monthly length-frequency data. Growth parameters were estimated, using the seasonalized von Bertalanffy growth function model $(L\infty\;=\;12.70\;mm\;CL,\;K\;=\;0.87yr^{-1},\;C\;=\;0.96,\;WP\;=\;0.59)$. The recruitment pattern was twice a year.

Keywords

References

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