Turkish Journal of Fisheries and Aquatic Sciences
2021, Vol 21, Num, 7 (Pages: 309-322)
Cinnamon Promotes Growth Performance, Digestive Enzyme, Blood Parameters, and Antioxidant Activity of Rainbow Trout (Oncorhynchus mykiss) in Low-Carbohydrate Diets
Mitra Ravardshiri 1 ,Somayeh Bahram 1 ,Seyed Rohollah Javadian 1 ,Masoumeh Bahrekazemi 1
1 Islamic Azad University, Department of Fisheries, Qaemshahr Branch, Qaemshahr, Iran
DOI :
10.4194/1303-2712-v21_7_01
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This study was conducted to investigate the effect of cinnamon in high- and lowcarbohydrate diets on the physiology of rainbow trout (Oncorhynchus mykiss)
(16.12±1.33 g). Six experimental diets including control/LCarb (200 g/kg
carbohydrate), LCarb-3C (200 g/kg carbohydrate, 30 g/kg cinnamon), LCarb-5C
(200g/kg carbohydrate, 50 g/kg cinnamon), HCarb (300 g/kg carbohydrate), HCarb-3C
(300 g/kg carbohydrate, 30 g/kg cinnamon), and HCarb-5C (300 g/kg carbohydrate, 50
g/kg cinnamon) were formulated to feed fish for eight weeks. The results showed that
fish fed dietary LCarb-3C (72.64 g) and LCarb-5C (73.17 g) had higher weight gain as
compared with treatments without cinnamon (P<0.05). Blood performance in LCarb3C (67.10) was significantly higher than the HCarb-3C group (P<0.05). Fish fed dietary
LCarb-3C had the best performance so that cinnamon in this group lowered glucose,
total cholesterol, and low-density lipoprotein, improved total protein, and highdensity lipoprotein contents. Supplementation of this herb also improved protease
and lipase in LCarb-3C and LCarb-5C groups as compared with control. Individuals fed
supplemented diets but not HCarb had a higher superoxide dismutase activity when
compared with the control group (P<0.05). Generally, cinnamon improved parameters
in this study in fish fed a low-carbohydrate diet rather than a high-carbohydrate diet.
Keywords :
Blood performance, Dietary additives, Hematology, Immunostimulants