진해만에 산란회유하는 대구(Gadus macrocephalus)의 연령과 성장패턴

Age Determination and Growth Pattern of Pacific Cod Gadus macrocephalus (Tilesius, 1810) in Jinhae Bay Korea

  • 최병언 (국립경상대학교 해양과학대학 해양산업연구소) ;
  • 곽우석 (국립경상대학교 해양과학대학 해양산업연구소)
  • Choi, Byung-Eon (College of Marine Science, The Institute of Marine Industry, Gyeongsang National University) ;
  • Gwak, Woo-Seok (College of Marine Science, The Institute of Marine Industry, Gyeongsang National University)
  • 투고 : 2011.11.03
  • 심사 : 2011.12.19
  • 발행 : 2011.12.31

초록

대구의 연령과 성장패턴에 대하여 조사하기 위해 진해만에서 2006~2009년 산란기간 동안 채집되었다. 조사된 총 333미의 대구 연령은 이석을 이용하여 추정하였고, 비늘이 연령형질에 있어 적합성을 보기 위하여 96미의 대구에서 채집한 비늘의 결과와 비교하였다. 비늘을 이용한 연령사정에서 제2등지느러미 기저 부분과 미병고 부분에서 채집한 비늘이 이석연령과 높은 상관성을 나타내어 연령사정에 가장 적합한 것으로 나타났다. 이석의 연변부지수는 12월부터 감소하여 2월에 가장 낮았다. 연령은 암컷과 수컷 모두 4~6세 범위였으며, 6세어가 대부분을 차지하였다. 전장(TL)은 이석경(R)에 1차 비례하여 수컷이 TL=10.4R+3.1, 암컷이 TL=11.5R+3.4의 관계식을 보였다. 역계산된 연령별 전장으로부터 추정된 대구의 von Bertalanffy 성장식은 수컷 $L_t$=141.5 [1-exp{-0.089 (t+0.209)}], 암컷 $L_t$=127.5 [1-exp{-0.124 (t+0.077)}]였다.

Age and growth pattern of Pacific cod Gadus macrocephalus were determined using samples collected in Jinhae Bay in Korea during the spawning period from 2006 to 2009. The ages of 333 specimens were estimated using their otoliths. The reliability of scales as a means of age determination was analyzed by comparing the ages estimated from otoliths and scales of 96 specimens. The scales collected from the base of the second dorsal fin or from the caudal peduncle were proved to be suitable for age determination of Pacific cod. Monthly changes in the marginal index in otoliths decreased from December showing the lowest value in February. Ages ranged from 4 to 6 years for both females and males, and most of them were 6 years old. Relationships between the otolith radius (R) and total length (TL) were TL=10.4R+3.1 for males, and TL=11.5R+3.4 for females. The growth curves in total length ($L_t$, cm) were expressed as $L_t$=141.5 [1-exp{-0.089 (t+0.209)}] for males and $L_t$=127.5 [1-exp {-0.124 (t+0.077)}] for females.

키워드

참고문헌

  1. Bertalanffy, L. von. 1983. A quantitative theory of organic growth. Hum. Biol., 10: 181-213.
  2. Chyung, M.G. 1977. The Fishes of Korea. Ilji Publ., Seoul, 727pp. (in Korean)
  3. Cohen, D.M., T. Inada, T. Iwamoto and N. Scialabba. 1990. FAO species catalogue. Vol. 10 Gadiform fishes of the world (Order Gadiformes). An annotated and illustrated catalogue of cods, hakes, grenadiers and other gadiform fishes known to date. Rome. FAO Fish. Synop., 125: pp. 442.
  4. Foucher, R.P. and S.J. Westrheim. 1984. Numbers landed-atage and associated standardized landing statistics for Pacific cod (Gadus macrocephalus) from important area-time cells off southwest Vancouver Island, and in Queen Charlotte Sound and Hecate Strait, 1956-82. Can. MS. Rep. Fish. Aquat. Sci. 1775, 59pp.
  5. Foucher, R.P., R.G. Bakkala and D. Fournier. 1984. Comparison of age frequency derived by length-frequency analysis and scale reading for Pacific cod in the north Pacific Ocean. Int. North. Pac. Fish. Comm. Bull., 42: 232-242.
  6. Gong, Y., Y.C. Park and S.S. Kim. 1991. Study on the management unit stock of fisheries resources by Genetic method 1. Genetic Similarity of Pacific cod, Gadus macrocephalus, in the North Pacific. Sujin. Res. Rep., 45: 24-61.
  7. Gwak, W.S. and K. Nakayama. 2011. Genetic variation and population structure of the Pacific cod Gadus macrocephalus in Korean waters revealed by mtDNA and msDNA markers. Fish. Sci., 77: 945-952.
  8. Hall, G.E. 1989. Age and Growth of Fish. Iow. Sta. Univ., 544pp.
  9. Hattori, T., Y. Sakurai and K. Shimazaki. 1992. Age determination by sectioning of otoliths and growth pattern of Pacific cod. Nippon Suisangakkaishi, 58: 1203-1210.
  10. Ketchen, K.S. 1961. Observations on the ecology of the Pacific cod (Gadus macrocephalus) in Canadian waters. J. Fish. Res. Board. Can., 18: 513-558. https://doi.org/10.1139/f61-044
  11. Lai, H.L., D.R. Gunderson and L.L. Low. 1987. Age determination of Pacific cod, Gadus macrocephalus, using five ageing methods. Fish. Bull. US., 85: 713-723.
  12. Moiseev, P.A. 1953. Cod and flounders of fareastern seas. Lzv. Tikhookean. Nanch. No-Issled. Inst. Rybn. Khoz. Okeanogr., 40: 1-287.
  13. Uchida, K. 1936. On the Pacific cod of adjacent waters to Korea. Chousen no. Suisan., 130: 24-29.
  14. Westrheim, S.J. 1996. On the Pacific cod (Gadus macrocephalus) in British Columbia waters, and a comparison with Pacific cod elsewhere, and Atlantic cod (G. morhua). Can. Tech. Res. Fish. Aquat. Sci. 2092, 390pp.