Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Effect of rearing water temperature on growth and physiological response of juvenile chum salmon(Oncorhynchus keta)

사육 수온이 연어(Oncorhynchus keta) 치어의 성장 및 생리반응에 미치는 영향

  • Seok-Woo Jang (Inland Fisheries Industrial Research Institute of Chung Cheong Buk-do) ;
  • Han-Seung Kang (MS BioLab) ;
  • Dong-Yang Kang (Inland Fisheries Industrial Research Institute of Chung Cheong Buk-do) ;
  • Kyu-Seok Cho (Inland Fisheries Industrial Research Institute of Chung Cheong Buk-do)
  • 장석우 (충청북도내수면산업연구소) ;
  • 강한승 (엠에스바이오랩) ;
  • 강동양 (충청북도내수면산업연구소) ;
  • 조규석 (충청북도내수면산업연구소)
  • Received : 2022.12.02
  • Accepted : 2022.12.30
  • Published : 2022.12.31
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Abstract

This study was conducted to investigate the effects of different water temperatures (8, 11, 14 and 17℃) on growth, survival and hematological parameters of juvenile chum salmon(Oncorhynchus keta) for eight weeks. At the end of the experiment, at 14℃, the final body weights of the O. keta group were the highest compared to the other groups. Also, the O. keta showed a higher tendency in the 14℃ group than the 8, 11, and 17℃ groups in terms of growth performances, including specific growth rate (SGR), feed conversion ratio (FCR), feed efficiency (FE), weight gain (WG), and condition factor (CF). The survival rate (SR) was 100% at 8 and 11℃ groups, 96% at 14℃ group and 98% at 17℃ group. In the plasma components, the alanine aminotransferase (ALT) was significantly decreased at 17℃ group, whereas there was no significant change in the albumin (ALB), total protein (TP), sodium (Na+), potassium (K+) and chloride (Cl-) levels. Among the whole-body composition of salmon, moisture, crude protein, and ash were not significantly affected by water temperature. However, crude lipid in the 8℃ group was significantly higher than in other water temperature groups. The results of this study demonstrated that the optimal temperature to stable growth performance for juvenile O. keta was 14℃.

본 연구는 연어(Oncorhynchus keta) 치어의 성장, 생존 및 혈액 성상에 미치는 사육수온(8, 11, 14 및 17℃)의 영향을 연구하기 위해 수행되었다. 실험 종료 시 연어의 체중(body weight, BW)은 14℃ 실험구에서 가장 높았을 뿐 아니라, 특이성장률(specific growth rate, SGR), 사료전환 효율(feed conversion ratio, FCR), 사료효율(feed efficiency, FE), 증중률(weight gain, WG) 및 비만도(condition factor, CF)와 같은 성장지표에서도 14℃ 실험구가 가장 높은 경향을 나타내었다. 생존율(survival rate)은 8℃와 11℃ 실험구에서 100%를 보였고, 14℃ 실험구에서는 96% 및 17℃ 실험구에서는 98%를 각각 나타내었다. 혈장 성분 중 알라닌 아미노전이효소(alanine aminotransferase, ALT)는 17℃ 실험구에서 유의한 감소를 보였으나, 알부민(albumin), 총단백질(total protein, TP), 나트륨(sodium, Na+), 칼륨(potassium, K+) 및 염소(chloride, Cl-)는 유의한 변화를 보이지 않았다. 실험 종료 시 연어의 체성분 조사를 실시한 결과, 수분(moisture), 단백질(crude protein) 및 회분량(crude ash)은 수온에 따른 유의한 변화는 보이지 않았으나, 지질(crude lipid)은 다른 실험구에 비해 8℃ 실험구에서 유의하게 높은 경향을 보였다. 결론적으로 연어 치어가 성장하는데 필요한 최적의 사육 수온은 14℃로 보이나, 혈액 성상 등 생리적인 영향은 향후 추가적인 연구가 필요한 것으로 판단된다.

Keywords

Acknowledgement

본 연구는 충청북도내수면산업연구소의 연어 양식 연구과제(2022-103-0099-0287-00CF)의 지원을 받아 수행되었습니다.

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