Effect of garlic (Allium sativum) - supplemented diet on growth performance, body composition and fatty acid profile of rainbow trout (Oncorhynchus mykiss)

Abstract

In this study, rainbow trout were fed for a total of 90 days with different feed mixes containing 0.00%, 1.00%, 1.50% and 2.00% garlic (Allium sativum). The effect of garlic on the growth performance, body composition and fatty acid profile of rainbow trout was researched. The starting weight of fish in the experimental group was approximately 64.12±0.29 gr, which increased to 234.12±3.54gr, 246.31±4.41gr, 258.74±4.42gr, and 268.79±4.79gr, while the difference in growth between the groups was observed to be statistically significant (p<0.05). At the end of the feeding period, the specific growth rate (SGR), the economic conversion ratio (ECR), the feed conversion ratio (FCR), the economic profit index (EPI) and the protein efficiency ratio (PER) were checked. In this study, the nutritional composition and fatty acid profiles of fish after 90 days of feeding were examined. As a result of this study, the supplementation of garlic to the diet given to rainbow trout caused an increase in their protein ratio and a decrease in their moisture content and fat ratio. Additionally, it led to a decrease in fatty acid and monounsaturated fatty acid levels and an increase in polyunsaturated fatty acids.

The effects of dietary microbial 6‐phytase on growth parameters, intestinal morphometric properties and selected intestinal genes expression in rainbow trout (Oncorhynchus mykiss, Walbaum 1876)

“…The application of phytase enzyme and dietary inorganic phosphate led to significant improvement in economic conversion ratio and EPI in the present study. In line with Dikel et al (2010) and Öz et al (2018), our results revealed that dietary supplementation of phytase as a growth promoting agent significantly lowered the ECR. ECR was significantly low in fish fed on diets supplemented with phytase, leading to significantly high EPI, which was the highest in fish fed on diet T4 (750 OTU/kg) in the present study.…”

Growth, body proximate composition and selected blood parameters of rainbow trout Onchorhynchus mykiss fingerlings fed on a diet supplemented with nettle Urtica dioica and tarragon Artemisia dracunculus

“…Investigation of body proximate composition of rainbow trout which were fed with different levels of nettle and tarragon powder, showed the highest and the least percent of moisture in fish fed on N1+T1 and N3 respectively. In previous studies, garlic powder and black cumin oil (Nigella sativa) reduced body proximate moisture in rainbow trout (Öz et al, 2018), brown trout (S. caspius) (Zaefarian et al, 2017) and demonstrated high moisture in control (Öz et al, 2018;Zaefarian et al, 2017) similar to our result. Another study showed the highest level of moisture in control and the least level of moisture in sterlet sturgeon which was fed with garlic powder (Lee et al, 2014).…”

“…In our study, the highest body proximate protein was detected in fish fed on N3. In this line, the inclusion of garlic powder (Zaefarian et al, 2017), green tea ethanol extract (Hwang et al, 2013) and black cumin oil ( Nigella sativa ) (Öz et al, 2018) increased body protein in brown trout ( S. caspius ), black rockfish ( S. schlegeli ) and rainbow trout respectively. Furthermore, garlic powder and oil increased body proximate protein and reduced fat in Nile tilapia ( Oreochromis niloticus ) (Metwally, 2009).…”

Effects of dietary black cumin (Nigella sativa L.) oil on growth performance, hemato‐biochemical and histopathology of cypermethrin‐intoxicated Nile tilapia (Oreochromis niloticus)

“…In addition to this rich content, pharmacological properties are also quite high in black cumin oil. Its most known properties are antibacterial, antifungal, antiviral, antiprotozoan, antihistamine, antioxidant, non‐inflammatory, and immunostimulating properties (Altinterim, 2010; Öz, Dikel, & Durmus, 2018; Öz, Inanan, & Dikel, 2018). The content and pharmacological properties of black cumin oil stimulate growth in fish, reduce resistance to diseases and increase the appetite of the fish.…”

“…Black cumin oil used in the experiment was obtained from a commercial company and produced by cold press. In the study, only 1% black seed oil was supplemented to G2 and G4 feeds and the rate of black seed oil to be added to the feed was determined according to Öz, Dikel, & Durmus, 2018.…”