plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111elSSN : 2287-8815
조규석*·이유진
충청북도내수면산업연구소
The study investigated the survival, growth, and cataract occurrence in juvenile Atlantic salmon Salmo salar exposed to two different water temperatures for 120 days, with 12.5°C in a recirculating aquaculture system and 16.0°C in a flow-through system. The survival rate of the fish under 12.5°C temperature conditions remained high at 91.0%, whereas under 16.0°C, it significantly decreased to 72.1%. The weight gain in the 16.0°C temperature group was 4,058%, considerably higher than the 2,723% in the 12.5°C. The feed efficiency and specific growth rate were also significantly higher in the 16.0°C temperature group at 103.29% and 0.15%, respectively, compared to the 12.5°C. The average cataract score in the 12.5°C temperature group was 0.47, whereas it was 1.93 in the 16.0°C. Additionally, in both temperature groups, cataract scores tended to increase with the growth rate. The condition factor remained stable at 1.01 in the 12.5°C temperature group but showed a negative effect under 16.0°C, dropping to 0.90. In conclusion, juvenile Atlantic salmon exposed to 16.0°C for 120 days are likely to experience adverse effects on survival and health, with rapid growth at 16.0°C temperatures leading to an increased risk of cataract development.
Atlantic salmon, Salmo salar, Cataract, Growth, Survival rates