Faculty of Veterinary Medicine, Urmia University Veterinary Research Forum 2008-8140 6 1 2015 03 01 Effect of dietary aloe vera on growth and lipid peroxidation indices in rainbow trout (Oncorhynchus mykiss) 63 67 11348 EN Ghazale Golestan Department of Fisheries, Faculty of Marine Natural resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran; Amir Parviz Salati Department of Fisheries, Faculty of Marine Natural resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran; 0000-0001-5713-0816 Saeed Keyvanshokooh Department of Fisheries, Faculty of Marine Natural resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Mohammad Zakeri Department of Fisheries, Faculty of Marine Natural resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Hossein Moradian Coldwater Fishes Genetic and Breeding Research Center, Iranian Fisheries Research Organization, Yasuj, Iran Journal Article 2015 01 14 Aloe vera has been used worldwide in pharmaceutical, food and cosmetic industries due to the plethora of biological activities of its constituents. This study was done to evaluate the effects of dietary aloe vera on growth and lipid peroxidation in rainbow trout<em> (Oncorhynchus mykiss)</em>. A total number of 480 <em>O. mykiss</em> (mean weight 9.50 ± 0.85 g) were randomized into four experimental groups including one control and three experimental groups that aloe vera was incorporated in their diet at 0.5, 1.0 and 2.0 g kg^-1. Trial was done for eight weeks. Then biometry and blood sampling were done. Plasma malondialdehyde, ferric reducing ability of plasma and growth index were estimated at the end of study. The results showed that aloe vera extract did not affect growth indices. Malondialdehyde was increased in the experimental group compared to the control group but ferric reducing ability of plasma showed a decrease in experimental groups (<em>p </em>< 0.05) compared to the control group. Our findings showed that dietary aloe vera have adverse effects on antioxidant defense system in <em>O. mykiss</em>. https://vrf.iranjournals.ir/article_11348_00693ceec3aa42db186efa62ed8917d2.pdf