Journal of Fisheries and Marine Sciences Education (수산해양교육연구)

The Korean Society for Fisheries and Marine Sciences Education (한국수산해양교육학회)
권호 표지
DOI QR코드

DOI QR Code

Sex Ratio of Olive Flounder, Paralichthys olivaceus Populations Collected from Stocked Areas in Southwestern Sea of Korea

우리나라 남서해 종묘방류해역에서 어획된 넙치집단의 성비

  • Received : 2014.11.03
  • Accepted : 2015.03.10
  • Published : 2015.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

Olive flounder, Paralichthys olivaceus is one of the most target fish for aquaculture and national stock enhancement program in Korea. In order to find more information about hatchery fish stocking for stock enhancement we investigated the sex ratio of wild-caught fish populations which were artificially released into wild seas. The recapture rate was 9.0% to 94.5% in studied areas. The proportion of sex ratio ranged from 7.8% to 64.6% in female and from 34.4% to 92.1% in male respectively. This result suggests that the sex ratio of wild populations might be effected by the released fish. So we need more careful stocking program of the fish to preserve the balance of the sex ratio in the wild population.

넙치종묘 방류가 자연집단의 성비에 어떠한 영향을 미치는지 5 개 지역에서 어획된 넙치집단에 대한 성비를 조사하였다. 조사된 지역에서 방류넙치와 자연넙치가 혼획 되어 어획된 집단의 암컷 비율의 범위는 7.9~64.6%로 나타났으며, 고흥집단에서의 수컷의 비율이 92.1%로 가장 높게 나타났다. 방류어의 암수비율을 보면 완도집단에서 56.3%와 43.7%로 암컷의 비율이 다소 높게 나타났으나 고흥집단은 8.3%와 91.7%였고, 추자집단에서 26.4%와 73.6%로 수컷의 비율이 높게 나타났다. 방류넙치의 혼획률이 높은 고흥집단과 완도집단에서는 방류 넙치의 암수비율이 자연 집단의 성비에 영향을 미치는 것으로 나타났다.

Keywords

References

  1. Fujii T.(2006). Migration of released hatchery-reared Japanese flounder Palalichthys olivaceus along the Sea of Japan. Bull Fish Res Agen 5, 143-146. (in Japanese)
  2. Gorie S..Ohtani T..Miyahara K.(2005). Population characters of the Japanese flounder Paralichthys olivaceus caught in the Sea of Japan, off Hyogo prefecture. Bull Hyogo Pref Fish Exp Sta 38, 7-15. (in Japanese)
  3. Imai Y.Yoshimura K..Kiyokawa S.(2002). Movement and growth of hatchery-reared Japanese flounder Paralichthys olivaceus tagged and released at northern Hokkaido coast in 1999. Sci Rep Hokkaido Fish Exp Stn, 63, 33-39. (in Japansese)
  4. Jeong D. S..Jeon C. Y.(2008). Genetic variability and population structure of olive flounder Paralichthys olivaceus from stocked areas using microsatellite DNA markers. Kor J Ichthyol 20, 156-162.
  5. Jeong D. S..Kim K. S..Kim K. K.(2006). Evaluation of effective breeders number (Ne) for stock enhancement in olive flounder Paralichthys olivaceus using Microsatellite DNA markers. J Kor Aquaculture 19, 205-209.
  6. Jeong D. S..Noh J. K..Myeong J. I..Lee J. H.. Kim H. C..Park C. J..Min B. H..Ha D. S.. Jeon C. Y.(2009). Genetic variability comparison of wild population and cultured stocks of flounder Paralichthys olivaceus based on microsatellite DNA markers. Kor J Ichthyol 21, 221-226.
  7. Kim J. H..Bang I. C..Cho J. K..Baek J. M. (2004). Effect of size grading on growth and sex ratio of parrot fish (Oplegnathus fasciatus). J Kor Fish Soc 37, 197-201.
  8. Kim K. K..Bang I. C..Kim Y.(1996). Studies on the production of all-female populations of olive flounder, Paralichthys olivaceus : Sex determination by water temperature during sex differentiation period, J Aquaculture 9, 429-435.
  9. Lee C. H..Na O. S..Yeo I. K..Baek H. J..Lee Y. D.(2000). Effects of sex steroid hormones and high temperature on sex differentiation in black rockfish, Sebastes schlegeli. J Kor Fish Soc 33, 373-377.
  10. Lee Y. D..Lee T. Y.(1990). Sex differentiation and development of the gonad in the flounder, Paralichthys olivaceus(TEMMINCK et SCHLEGEL). Bull Mar Res Inst, Cheju Nat Univ, 14, 61-86.
  11. Luckenbach J. A..Godwin J.Daniels H. V..Borski R. J.(2003). Gonadal differentiation and effects of temperature on sex determination in southern flounder (Paralichthys lethostigma). Aquaculture 216, 315-327. https://doi.org/10.1016/S0044-8486(02)00407-6
  12. Nakayama K.Ohkawa T.Marukawa Y.Tainosho Y..Tanaka M.(2006). Studies on genetic population structure and ecological-physiological characteristics of local populations of Japanese flounder (Palalichthys olivaceus). Bull Fish Res Agen 5, 139-142. (in Japanese)
  13. Noh J. K..Kim H. C..Park C. J..Lee J. H..Kim J. H..Lee M. S..Kim W. J..Kim K. K.. Myeong J. I.(2008). Genetic variability of farmed olive flounder (Paralichthys olivaceus) populations managed with no consideration of genetic diversity. Kor J Ichthyol 20, 248-254.
  14. Rougeot C..Prignon C..Kengne CVN.Melard C.(2008). Effect of high temperature during embryogenesis on sex differentiation process in the Nile tilapia, Oreochromis niloticus. Aquaculture 276, 205-208. https://doi.org/10.1016/j.aquaculture.2008.02.001
  15. Sekino M..Saitoh K..Yamada T..Kumagai A.. Hara M..Yamashita Y.(2003). Microsatellite-based pedigree tracing in a Japanese flounder Paralichthys olivaceus hatchery strain: implications for hatchery management related to stock enhancement program. Aquaculture 221, 255-263. https://doi.org/10.1016/S0044-8486(02)00667-1
  16. Yamamoto E..Masutani R.(1990). Spawning experiments with gynogenetically diploid sinistral flounders (hirame, Paralichthys olivaceus) with corroborative evidence of large-scale all-female production. Bull Tottori Pref Fish Exp Sta 32, 28-38. (in Japanese)