사료내 손바닥선인장(Opuntia ficus-indica) 첨가가 육성기 조피볼락 (Sebastes schlegeli)의 성장, 육질, 비특이적 면역반응 및 조직 성상에 미치는 영향
Effects of Dietary Supplementation of Cactus Opuntia ficus-indica on Growth, Flesh Quality, Lysozyme Activity and Histological Change of Growing Korean Rockfish Sebastes schlegeli
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This study investigated the effects of dietary cactus Opuntia ficus-indica stem and fruit extract on the growth, flesh quality, lysozyme activity, and histological changes of growing Korean rockfish Sebastes schlegeli. Three replicates of fish (152 g/fish) were fed one of the following diets: containing 0 additions (control); 0.1, 0.5, or 1.0% cactus stem powder; or 1.0% fruit extract for 11 weeks. Growth performance did not differ significantly among treatments, including survival, final weight, feed efficiency, and daily feed intake. The experimental diets did not affect the proximate and fatty acid compositions, plasma biochemistry, or dorsal muscle texture of the fish. However, the plasma lysozyme activity of the fish fed the diet containing 0.1% cactus stem was significantly higher than that of the fish fed the control diet. These fish had variously sized lipid vacuoles in the liver tissue compared with the control. Distinct mucosal folds and mucus-secreting goblet cells developed in the fish fed the diet containing 1% cactus stem compared with the other dietary groups. These results suggest that feeding growing Korean rockfish cactus stem might increase the plasma lysozyme activity and induce histological changes in the gastrointestinal tract that might be related to digestion.
Abstract
This study investigated the effects of dietary cactus Opuntia ficus-indica stem and fruit extract on the growth, flesh quality, lysozyme activity, and histological changes of growing Korean rockfish Sebastes schlegeli. Three replicates of fish (152 g/fish) were fed one of the following diets: containing 0 additions (control); 0.1, 0.5, or 1.0% cactus stem powder; or 1.0% fruit extract for 11 weeks. Growth performance did not differ significantly among treatments, including survival, final weight, feed efficiency, and daily feed intake. The experimental diets did not affect the proximate and fatty acid compositions, plasma biochemistry, or dorsal muscle texture of the fish. However, the plasma lysozyme activity of the fish fed the diet containing 0.1% cactus stem was significantly higher than that of the fish fed the control diet. These fish had variously sized lipid vacuoles in the liver tissue compared with the control. Distinct mucosal folds and mucus-secreting goblet cells developed in the fish fed the diet containing 1% cactus stem compared with the other dietary groups. These results suggest that feeding growing Korean rockfish cactus stem might increase the plasma lysozyme activity and induce histological changes in the gastrointestinal tract that might be related to digestion.
참고문헌 (22)
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