Habiba Mahmoud M, Hussein Ebtehal E, Ashry Ahmed M, El-Zayat Ahmed M, Hassan Aziza M, El-Shehawi Ahmed M, Sewilam Hani, Van Doan Hien, Dawood Mahmoud A O
National Institute of Oceanography and Fisheries, NIOF, Cairo 11865, Egypt.
Department of Poultry and Fish Production, Faculty of Agriculture, Menoufia University, Shebin El-Kom 32516, Egypt.
Animals (Basel). 2021 Jul 17;11(7):2128. doi: 10.3390/ani11072128.
Dietary cinnamon has several bioactive compounds with growth-promoting and immunomodulation potential and is suggested for finfish species. This study evaluated the inclusion of cinnamon at 0, 10, 15, and 20 g/kg in European sea bass () diets. After 90 days, the highest final weight, weight gain, specific growth rate, protein efficiency ratio, and the lowest feed conversion ratio were seen in fish treated with 10 g/kg ( < 0.05). Further, the measured growth hormone in the blood indicated that fish treated with 10 g/kg had a higher level than fish 0 and 20 g/kg. After the feeding trial, fish treated with cinnamon at varying levels had higher lipid content than fish before the feeding trial ( < 0.05). Lower spp. and Faecal Coliform counts were observed in fish treated with cinnamon than fish fed a cinnamon-free diet ( < 0.05). The hematocrit level was markedly ( < 0.05) increased in fish fed cinnamon at 10 g/kg compared to the control without significant differences with fish fed 15 and 20 g/kg. Hemoglobin was significantly increased in fish treated with cinnamon at 10, 15, and 20 g/kg compared to fish fed a cinnamon-free diet ( < 0.05). Red and white blood cells (RBCs and WBCs) were meaningfully ( < 0.05) increased in fish treated with cinnamon compared with the control. Markedly, fish treated with cinnamon had higher serum total lipids than the control with the highest value in fish treated with 15 g/kg ( < 0.05). The lysozyme activity was markedly higher in fish treated with 15 g cinnamon/kg than fish fed 0, 10, and 20 g/kg ( < 0.05). Moreover, phagocytic activity was significantly higher in fish treated with cinnamon at 10, and 15 g/kg than fish fed 0 and 20 g/kg ( < 0.05). In conclusion, dietary cinnamon is suggested at 10-15 g/kg for achieving the high production and wellbeing of European sea bass.
膳食肉桂含有多种具有促进生长和免疫调节潜力的生物活性化合物，已被推荐用于食用鱼类。本研究评估了在欧洲鲈鱼（）日粮中添加0、10、15和20克/千克肉桂的效果。90天后，日粮中添加10克/千克肉桂的鱼最终体重、增重、特定生长率、蛋白质效率比最高，饲料转化率最低（<0.05）。此外，血液中测得的生长激素表明，添加10克/千克肉桂的鱼生长激素水平高于添加0和20克/千克肉桂的鱼。投喂试验后，不同水平添加肉桂的鱼的脂质含量高于投喂试验前（<0.05）。与未添加肉桂日粮的鱼相比，添加肉桂的鱼中较低的弧菌属和粪大肠菌群数量（<0.05）。与对照组相比，日粮中添加10克/千克肉桂的鱼的血细胞比容水平显著升高（<0.05），与添加15和20克/千克肉桂的鱼无显著差异。与未添加肉桂日粮喂养的鱼相比，添加10、15和20克/千克肉桂的鱼的血红蛋白显著增加（<0.05）。与对照组相比，添加肉桂的鱼的红细胞和白细胞（RBC和WBC）显著增加（<0.05）。显著地，添加肉桂的鱼的血清总脂质高于对照组，添加15克/千克肉桂的鱼血清总脂质最高（<0.05）。添加15克/千克肉桂的鱼的溶菌酶活性显著高于添加0、10和20克/千克肉桂的鱼（<0.05）。此外，添加10和15克/千克肉桂的鱼的吞噬活性显著高于添加0和20克/千克肉桂的鱼（<0.05）。总之，建议日粮中肉桂添加量为10 - 15克/千克，以实现欧洲鲈鱼的高产和健康生长。
