中国水产科学2016，Vol.23Issue(4)：976-984,9.DOI:10.3724/SP.J.1118.2016.15438
环境光色对工业化养殖豹纹鳃棘鲈幼鱼生长、肤色及生理指标的影响
Effects of light color on growth, skin color, and physiological indices of juvenile Plectropomus leopardus in a recirculating aquaculture system
摘要
Abstract
Plectropomus leopardushas high economic value and vast market prospects because of its nutritional and delicious flesh and appealing body color. This experiment investigated the effects of light color on growth, skin color, and physiological indices of juvenileP. leopardus in a recirculating aquaculture system (RAS). The trial employed a single factor design of four light colors (red, blue, dark, and day-night) to raise juvenileP. leop-ardus(body weight, 64.2 g±1.1 g) for 94 d. As a result, the weight gain rate of fish in the day-night group in-creased by 28.6% and 39.2% compared with that in the dark and red light groups (P<0.05,P<0.01), but no differ-ence was observed compared with the blue light group (P>0.05). The weight gain rate in the blue light group in-creased by 31.2% compared with that in the red light group (P<0.05). Skin carotene content of fish in the day-night group exceeded that in the blue and dark light groups by 45.7% and 68.5%, respectively (P<0.05), but no difference was observed compared with the red light group (P<0.05). Skin carotene and melanin contents of fish increased and decreased at the same time, but by different amounts in the four treatments. Therefore, we de-fined this phenomenon as “synchronous but different magnitude”. Pepsin activity of fish in the day-night group increased by 48.0%–88.5% (P<0.05) compared with that in the other groups. Fish in the day-night group had bet-ter immunity, assuperoxide dismutase and lysozyme activities were significantly higher than those in the other groups (P<0.01), whereas malondialdehyde level was lower than that in the dark and red groups (P<0.05,P<0.01). Na+, K+-ATPase activity increased by a mean of 78.1% in the day-night and red light groups (P<0.01). Trypsin activity was significantly higher in the blue light group than that in the red and day-night light groups by 34.3% and 21.8%, respectively (P<0.05). In conclusion, our data demonstrate that juvenileP. leopardusunder day-night light had better growth, skin color, and physiological performance than those held under the other conditions. Blue light improved protein digestive ability and growth, and red light increased carotene content and nutrition absorp-tion by fish. The “synchronous but different magnitude” phenomenon helped regulate and optimize fish skin color. These results suggest that the light color juvenileP. leopardus are exposed to in a RAS should be considered to optimize growth and skin color.关键词
光色/工业化养殖/豹纹鳃棘鲈幼鱼/生长/肤色/消化吸收/免疫Key words
light color/industrialized culture/growth/juvenilePlectropomus leopardus/skin color/digestion and absorption/immunity分类
农业科技引用本文复制引用
赵宁宁,周邦维,李勇,张静,马骏,于学权..环境光色对工业化养殖豹纹鳃棘鲈幼鱼生长、肤色及生理指标的影响[J].中国水产科学,2016,23(4):976-984,9.基金项目
十二五国家科技支撑计划项目(201113AD13B07) （201113AD13B07）
中国科学院院地合作项目(Y12530101L) （Y12530101L）
