A Study on the Assembling Mechanism of the Hairtail, Trichiurus Lepturus, at the Fishing Grounds of the Cheju Strait

제주해협 갈치(Hairtail,Trichiurus lepturus) 자원의 어장형성기구에 관한 연구

  • Kim, Sag-Hyun (College of Ocean Sciences Cheju National University) ;
  • Rho, Hong-Kil (College of Ocean Sciences Cheju National University)
  • 김상현 (제주대학교 해양과학대학) ;
  • 노홍길 (제주대학교 해양과학대학)
  • Published : 1998.06.01

Abstract

The study on the Assembling Mechanism of the Hairtail, Trichiurus lenpturus, at the Fishing Grounds of the Cheju Strait had been investigated by analyzing the relationship of the oceanographic conditions and the fishing ground of the Hairtail in the Cheju Strait. 1. The fishing grounds of the hairtail at the Cheju Strait are formed at the bottom of a high temperature of the tidal front at the coast. area of northern Cheju Island, the tip of the linguiform is high in salinity at the eastern and western entrances of Cheju Island, low salinity eddy on the surface and its surrounding front, various water masses in the Strait and coastal waters of the South Sea in Korea. 2. The fishing grounds of the Hairtail at the Cheju Strait begins with the sea surface temperature higher than $15^{\circ}C$ and the incoming of low salinity water now from the East China Sea. 3. Estimation of optimum temperature and salinity per season based upon analysis for relationship between temperature of water and salinity of the bottom layer and the catch is : 15.2~$16.4^{\circ}C$, 34.20~34.40${\textperthousand}$ in spring(June); 14.4~ $17.0^{\circ}C$, 33.70~34.30${\textperthousand}$ in summer(July~September); and 15.7~ $18.6^{\circ}C$, 33.70~34.50$\textperthousand$ in autumn(October~December). Hairtail are mostly caught at the Yellow Sea Warm Current and Tsushima Current with temperature over $14.5^{\circ}C$ and salinity over 33.70${\textperthousand}$ at the bottom layers of the Cheju Strait. 4. Considering the relationship between the amount of hairtail catch and the water temperature of bottom layer, when the bottom water being above $14.0^{\circ}C$ flowed into Cheju Strait through the western entrance of the strait in summer, the ca-h appears to have been abundant. In contrast, the catch has been poor when the temperature of such water was recorded to be below $13^{\circ}C$ Therefore, distribution patterns of water at the bottom layer can be used as a forecast index whether the catch of a certain year will be good or poor.

Keywords

References

  1. Bull. Korean Fish. Soc. v.26 no.4 Relationship between Oceanographic Conditions and Catch of the Hairtail Trichiurus lepturus Linnefrom the Stow Net Baik, C. I.;J. H. Park
  2. Bull. Nat. Fish. Res. Dev. Agency v.43 Fluctuation of Fishing Conditions of Filefish, Navodon modestus(GUNTHER) in relation to Oceanographic Characteristics in Korean Waters Baik, C. I.;J. H. Park
  3. Bull. Nat. Fish. Res. Dev. Agency v.46 The Variations of Fishing Conditions of Yellow Croaker Pseudosciaena polyactis Bleeker in Relation to the Oceanographic Conditions of Korean Waters Baik, C. I.;J. H. Park;K. D. Cho
  4. Report of Research on Fishing Cheju Nat. Univ. v.3 On Spanish Mackerel drift net fishery at Chuja-Do Cho, K. D.;H. I. Shin
  5. Bull. Korean. Fish. Soc. v.14 no.4 Studies on the Distribution and Fluctuation of the Purse-Seine Fishing Grounds in Relation to Oceanographic Conditions in the East China Sea-The Distribution of Mackerels and Jack Mackerel Fishing Grounds Cho, K. D.
  6. Bull. Korean Fish. Soc. v.18 no.1 On the Fishing Grounds of Buse and Oceanographic Condition in the Yellow Sea and the East Chins Sea Hong, C. H.
  7. Bull. Nat. Fish. Res. Dev. Agency v.36 On the Seasonal Distribution, Movement and Abundance of Hairtail, Trichiurus lepturus Linne, in the East China Sea and Yellow Sea Hwang, B. N.;B. Q. Hong
  8. Ph. D. Thesis, Cheju National Univ. Studies on the Assembling Mechanism of Hairtail, Trichiurus lepturus, at the Fishing Ground of the Cheju Strait Kim, S. H.
  9. M. S. Thesis, Cheju National Univ. Study on the structure of Spanish mackerel fishing ground in the Southern and Western Sea of Korea Kim, Y. G.
  10. Regional Fisheries Research Laboratory no.32 Fisheries Biology on the Ribbon Fish(Trichiurus lepturus LINNE) in the East China and Yellow Seas Contributions from the Seikai Misu, H.
  11. Ph. D. Thesis, Tokyo Univ. Study on the fishing ability and conditions of the mackerel purse seine in the waters around Cheju Island, Korea Park, J. S.
  12. Ph. D. Thesis, Tokyo Univ. Studies on Marine Environment of Fishing Grounds in the Waters around Jeju Island Rho, H. K.
  13. Calif Coof. Oceanogr. Fish. Invest. Reports v.Ⅷ Fisheries Oceanography in the Japan Uda, M.
  14. Bull. Fish. Res. Dev. Agency. v.7 A study on the Stow-net Fishery Resources on the Korean West Coast Choo, W. I.
  15. 수산진흥원 연구보고 v.3 꽁치의 어황과 해황과의 관계 한희수;공영
  16. 中央水産試驗場 水産資源調査報告 no.3 갈치資源調査報告 辛廣允;閔祥基