Initial Feeding Habits and Changes in Body Composition of Juvenile Black Sea Bream, Acanthopagrus schlegeli Released into the Gamak Bay

가막만 해역에 방류된 감성돔, Acanthopagrus schlegeli 치어의 초기 먹이섭취 패턴과 어체성분 변화

  • Published : 2007.05.25

Abstract

Artificially-produced juvenile black sea bream, Acanthopagrus schlegeli (total length $10.4{\pm}1.1\;cm$, body weight $18.7{\pm}3.4\;g$) were released into the Gamak Bay in Korea. And their initial feeding habits and body compositions were compared with those of cultured fish (CUL) for a period of one month after release. The released black sea bream commenced feeding on the 1st day after release, and predation rate was more than 80% during the sampling period. The stomach content of fish was composed of mainly fishing bait and krill in fish sampled on 15th days after release; however, its content changed to the natural organisms such as algae and small crustaceans when the fish was sampled on 20th days after release. Crude lipid content of carcass of fish in the sampling station A (SA) were lower than that of fish in the initial, sampling station B (SB) and CUL for the 5th and 10th days after release. Carcass n-3 HUFA composition, total amino acid and essential amino acid contents of released fish showed high trend compared to that of cultured fish in 30th days after release. The released fish have the ability to adjust their feeding habits and biochemical metabolism to the natural environment within a short period even though they showed preference to artificial feed in the early days after release.

전라남도 여수시 가막만에 방류한 감성돔, Acanthopagrus schlegli 치어의 초기 먹이섭취 및 먹이조성 그리고 체성분 변화에 대해 1개월간 추적연구를 수행하였다. 방류 감성돔은 방류 후 1일째부터 먹이섭취가 이루어졌으며, 포식율은 조사기간 동안 80% 이상을 보였다. 먹이조성은 방류 후 15일째까지 낚시미끼와 가두리에서의 사료 유출물 등 인공먹이를 주로 섭취하였으나, 그 후 20일 이후부터 자연먹이로의 전환이 이루어졌다. 방류 후 5일 그리고 10일째의 A 정점(SA) 방류 감성돔의 전어체 조지방 함량이 방류전, B 정점(SB) 그리고 양식어(CUL)보다 낮은 값을 보였으며, 방류 30일째의 전어체의 n-3 HUFA 조성 및 필수아미노산 함량은 방류어에서 약간 높은 경향을 보였다. 본 연구 결과, 가막만에 방류된 감성돔은 빠른 먹이섭취가 이루어졌으며, 초기 먹이섭취 및 먹이조성은 어체성분 변화에 영향을 미치는 것으로 나타났다.

Keywords

References

  1. Akiyama, T., T. Murai and T. Nose, 1983. Fluctuations in some body components of fingerling chum salmon after release. Bull. Natl. Res. Inst. Aquaculture, 4, 107-112
  2. AOAC, 1990. Official Method of Analysis of the Association of Official Analysis Chemists. 15th ed. Arlington. Virginia, 1298 pp
  3. AOCS, 1990. AOCS official method. (in) Official Method and Recommended Practice of the AOCS, 4th ed., Vol I, AOCS. Champaign, USA, 89 pp
  4. Fushimi, H., 2001. Production of juvenile marine finfish for stock enhancement in Japan. Aquaculture, 200, 33-53 https://doi.org/10.1016/S0044-8486(01)00693-7
  5. Huh, S. H. and S. N. Kwak, 1998. Feeding habits of juvenile Acanthopagrus schlegeli in the eelgrass (Zostera marina) bed in Kwangyang Bay. Kor. J. Ichthyol., 10, 168-175
  6. Ji, S. C., J. H. Yoo, S. W. Lee, H. J. Go, G. S. Jeong and J. G. Myeong, 2004. Comparison of digestive organ and body composition among the cultured, wild and released fish, 1-year black sea bream, Acanthopagrus schlegeli. J. Kor. Fish. Soc., 37, 462- 468
  7. Lee, H. Y. M., M. W. Park and I. G. Jeon, 2000. Comparison of nutritional characteristics between wild and cultured juvenile black rockfish, Sebastes schlegeli. J. Kor. Fish. Soc., 33, 137- 142
  8. Matsumiya, Y. and K. Kiso, 1982. Movements and adaptation process in Shijiki Bay, Hirao Island. Bull. Seikai Reg. Fish. Res. Lab., 58, 89-98
  9. Nakagawa, H., H. Imabayashi, H. Kurokura and S. Kasahara, 1991. Changes in body constituents of young red sea bream, Pagrus major in reference to survival during experimental stocking. Biochem. System. Ecol., 19, 105-110 https://doi.org/10.1016/0305-1978(91)90032-U
  10. Nakagawa, H., J. Karakawa and M. Yamamoto, 1994. Changes in body constituents of young black sea bream, Acanthopagrus schlegeli (Bleeker) released into the Inland Sea of Japan. The 3rd Asian Fish. Forum, Asian Fish. Soc. Manila, Philippines, pp. 880-883
  11. Nakagawa, H., T. Umino, M. Hayashi, T. Sasaki and K. Okada, 2000. Changes in biochemical composition of black sea bream released at 20 mm size in Daio bay, Hiroshima. Suisanzoshoku, 48, 643-648
  12. Om, A. D., T. Umino, H. Nakagawa, T. Sakai, K. Okada, M. Asano and A. Nakagawa, 2001. The effects of dietary EPA and DHA fortification on lipolysis activity and physiological function in juvenile black sea bream, Acanthopagrus schlegeli. Aquacult. Res., 32, 255-262 https://doi.org/10.1046/j.1355-557x.2001.00040.x
  13. Umino, T., M. Hayashi, J. Miyatake, K. Nakagawa, T. Sasaki, K. Okada and H. Nakagawa, 1999. Significance of release of black sea bream at 20-mm size on stock enhancement in Daio Bay, Hiroshima. Suisanzoshoku, 47, 337-342
  14. Villa-Navarro, J., H. Nakagawa and M. Takada, 1990. Changes in lipid accumulation of young red sea bream, Pagrus major released into the Inland Sea of Japan (Setonaikai). La Mer, 28, 286-291
  15. Yamashita, H., T. Umino, S. Nakahara, K. Okada and H. Nakagawa, 1996. Comparison of biochemical characteristics between hatchery-produced and wild black sea bream. Nippon Suisan Gakkaishi, 62, 89-93 https://doi.org/10.2331/suisan.62.89
  16. Yamashita, H., T. Umino, S. Nakahara, K. Okada and H. Nakagawa, 1997. Changes in some properties of black sea bream released into the Daiô bay, Hiroshima. Fish. Sci., 63, 267-271 https://doi.org/10.2331/fishsci.63.267
  17. Yoo, J. H., D. J. Hwang, Y. H. Yoon, G. S. Jeong and H. J. Go, 2003. Initial adaptation of released black sea bream, Acanthopagrus schlegeli in Gamak Bay, southern coast in Korea. J. Kor. Fish. Soc., 36, 365-371
  18. Yoo, J. H., G. S. Jeong, M. G. Ju, S. C. Ji and J. G. Myoung, 2004. Abstract, Joint Meeting Korean Society of Fisheries Science, pp. 341-342. (in Korean)