<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Nile tilapia were fed four levels (0, 0.25, 0.5, and 1 ml/kg) of a liquid blend of herbal essential oils (EOs) containing carvacrol, oregano, 1,8 cineol, thymol, pinene, pinene β, limonene, and propylene glycol for 60 days. The results showed higher final weight, weight gain, and specific growth rate (P&lt;0.05) in fish delivered 0.25 and 0.5 ml EOs/kg than the control. However, the feed conversion ratio was markedly reduced in fish fed 0.5 and 1 ml EOs/kg (P&lt;0.05). Lipase showed enhanced activity in fish subjected to a blend of EOs, while fish fed 0.5 ml/kg of EOs blend had higher amylase activity (P&lt;0.05) than the other levels. Lysozyme activity and superoxide dismutase showed a higher value in fish that received 0.5 ml EOs/kg. Additionally, phagocytic and catalase activities were enhanced in fish that received 0.5 and 1 ml/kg while phagocytic index was enhanced in fish fed 1 ml/kg (P&lt;0.05). Interestingly, the total immunoglobulin level was markedly higher, while malondialdehyde was lower in EOs-subjected fish (P&lt;0.05) than in control. The histomorphology appearance of the intestine, liver, and spleen was enriched in EOs-treated fish compared to the control fish. In conclusion, the growth performance, feed efficiency, and blood bio-immunological indices were best in fish fed 0.5–1 ml of EOs blend per kg.</p></abstract>

Nile tilapia were fed four levels (0, 0.25, 0.5, and 1 ml/kg) of a liquid blend of herbal essential oils (EOs) containing carvacrol, oregano, 1,8 cineol, thymol, pinene, pinene β, limonene, and propylene glycol for 60 days. The results showed higher final weight, weight gain, and specific growth rate (P<0.05) in fish delivered 0.25 and 0.5 ml EOs/kg than the control. However, the feed conversion ratio was markedly reduced in fish fed 0.5 and 1 ml EOs/kg (P<0.05). Lipase showed enhanced activity in fish subjected to a blend of EOs, while fish fed 0.5 ml/kg of EOs blend had higher amylase activity (P<0.05) than the other levels. Lysozyme activity and superoxide dismutase showed a higher value in fish that received 0.5 ml EOs/kg. Additionally, phagocytic and catalase activities were enhanced in fish that received 0.5 and 1 ml/kg while phagocytic index was enhanced in fish fed 1 ml/kg (P<0.05). Interestingly, the total immunoglobulin level was markedly higher, while malondialdehyde was lower in EOs-subjected fish (P<0.05) than in control. The histomorphology appearance of the intestine, liver, and spleen was enriched in EOs-treated fish compared to the control fish. In conclusion, the growth performance, feed efficiency, and blood bio-immunological indices were best in fish fed 0.5–1 ml of EOs blend per kg.

A blend of herbal essential oils enhanced the growth performance, blood bio-immunology traits, and intestinal health of Nile tilapia (<italic>Oreochromis niloticus</italic>)

Department of Animal Production, Faculty of Agriculture

Department of Fish Health, Sakha Aquaculture Research Unit

Department of Anatomy and Embryology, Faculty of Veterinary Medicine

Annals of Animal Science

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

A blend of herbal essential oils enhanced the growth performance, blood bio-immunology traits, and intestinal health of Nile tilapia ()

Nile tilapia were fed four levels (0, 0.25, 0.5, and 1 ml/kg) of a liquid blend of herbal essential oils (EOs) containing carvacrol, oregano, 1,8 cineol,...

A blend of herbal essential oils enhanced the growth performance, blood bio-immunology traits, and intestinal health of Nile tilapia (Oreochromis niloticus)

Online veröffentlicht: 12. Mai 2022

Seitenbereich: 751 - 761

Eingereicht: 14. Mai 2021

Akzeptiert: 09. Aug. 2021

DOI: https://doi.org/10.2478/aoas-2021-0066

Schlüsselwörter
phytogenics, blue aquaculture, tilapia, health condition, production

© 2022 Fawzy I. Magouz et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

A blend of herbal essential oils enhanced the growth performance, blood bio-immunology traits, and intestinal health of Nile tilapia (Oreochromis niloticus)

Online veröffentlicht: 12. Mai 2022

Seitenbereich: 751 - 761

Eingereicht: 14. Mai 2021

Akzeptiert: 09. Aug. 2021

DOI: https://doi.org/10.2478/aoas-2021-0066

Schlüsselwörterphytogenics, blue aquaculture, tilapia, health condition, production

© 2022 Fawzy I. Magouz et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Schlüsselwörter
phytogenics, blue aquaculture, tilapia, health condition, production