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Growth and Sex Ratio of Juvenile Olive Flounder (Paralichthys olivaceus) at Different Size-ranks
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  • Growth and Sex Ratio of Juvenile Olive Flounder (Paralichthys olivaceus) at Different Size-ranks
  • Growth and Sex Ratio of Juvenile Olive Flounder (Paralichthys olivaceus) at Different Size-ranks
저자명
Kim. Jong-Hyun,Kim. Hyun-Chul,Noh. Jae-Koo,Lee. Jeong-Ho,Kang. Jung-Ha,Kim. Kyung-Kil
간행물명
Journal of fisheries science and technology
권/호정보
2007년|10권 4호|pp.191-195 (5 pages)
발행정보
한국수산과학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The aim of this study was to assess whether size-rank at the juvenile stage is associated with growth performance and sex ratio in olive flounder (Paralichthys olivaceus). Juveniles (mean body weight, $8.8{pm}0.9;g$) were selected from two age groups, with the high size-rank group (HSRG) fish in the upper 19.3-67.3% of 104 days post-hatching (dph) age group and the low size-rank group (LSRG) fish in the lower 9.0-55.7% of 116 dph age group. Triplicate groups of 100 fish were reared over 32 weeks. A heavier final body weight was observed in the HSRG ($360{pm}12;g$) compared to the LSRG ($315{pm}9;g$, P<0.05), whereas no differences in feed intake, feeding efficiency, and mortality were seen between the experimental groups. The percentage of females was significantly higher in the HSRG (51.7%) than in the LSRG (30.8%, P<0.05). In addition, a remarkable increase in growth was recorded in females, indicating that the relative frequency of females increased with a body weight increase. The results suggest that high size-rank juvenile olive flounder have better growth performance and a higher percentage of females, because females start growing faster than males before size grading occurs.