Nano-Oregano Essential Oil Improves Rainbow Trout’s (Oncorhynchus mykiss) Growth Performance, Oxidative Status, Fatty Acid Profile of Fillet, Affects Gene Expression and Supports Skin and Intestinal Histomorphometry

The present study was conducted to investigate the effects of a microencapsulated oregano feed additive containing oregano essential oil named “VISNAT 1” on growth performance, intestinal and skin histomorphometry, serum biochemical parameters, fillet oxidative status and fatty acids (FA) profile of...

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Bibliographic Details
Published in:Annals of animal science 2023-11, Vol.23 (4), p.1177-1189
Main Authors: Dokou, Stella, Bitchava, Konstantina, Stylianaki, Ioanna, Chantzi, Paraskevi, Efstathiou, Antonia, Vasilopoulou, Konstantina, Tsoumani, Maria, Gouva, Evangelia, Michailidis, Georgios, Prafulla, Kumar, Karagouni, Evdokia, Giannenas, Ilias
Format: Article
Language:English
Subjects:
antioxidant status
Apoptosis
Diet
Essential oils
Farming
Fatty acids
Feed additives
Fillets
Food additives
Gene expression
Growth factors
Growth hormone
Histomorphometry
Histopathology
IGF-1
Insulin
Insulin-like growth factor I
Insulin-like growth factors
Intestine
Oils & fats
Oncorhynchus mykiss
Oregano
oregano essential oil
rainbow trout
Salmon
Skin
Trout
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Summary:The present study was conducted to investigate the effects of a microencapsulated oregano feed additive containing oregano essential oil named “VISNAT 1” on growth performance, intestinal and skin histomorphometry, serum biochemical parameters, fillet oxidative status and fatty acids (FA) profile of rainbow trout ( ) under conventional farming conditions. Also, changes in the expression levels of both insulin-like growth factor-1 (IGF-1) and growth hormone 1 (GH-1) genes were assessed. A total of 200 sub-adult trouts (52 g±3.2) were randomly allocated into two different treatments with four replicates each. The control group was fed a basal diet, while oregano group was fed diet supplemented with oregano essential oil at the level of 1.0 kg/t of feed. The results indicate that the phytobiotic product beneficially altered feed, fillet and serum oxidative status and improved performance of trouts. Also, oregano essential oil beneficially affected the histopathology and histomorphometry of intestine and skin. Moreover, oregano oil addition in the rainbow trout diet can initiate mitogenic and anti-apoptotic responses in the liver, which is one of the main actions of IGF-1 receptor promoting body growth and health. As a result, oregano essential oil can be used as a supplement on trouts diet but further investigation upon its action should take place.
ISSN:2300-8733
1642-3402
2300-8733
DOI:10.2478/aoas-2023-0032