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Effects of hydroalcoholic extract of honeybee pollen on growth performance, flesh quality, and immune and stress response response of rainbow trout (Oncorhynchus mykiss)

Citation

Asgari, M and Kenari, AA and Esmaeili, M and Rombenso, A, Effects of hydroalcoholic extract of honeybee pollen on growth performance, flesh quality, and immune and stress response response of rainbow trout (Oncorhynchus mykiss), Aquaculture Nutrition, 26, (5) pp. 1505-1519. ISSN 1365-2095 (2020) [Refereed Article]

Copyright Statement

Copyright 2020 John Wiley & Sons Ltd

DOI: doi:10.1111/anu.13098

Abstract

The effects of dietary hydroalcoholic extract of honeybee pollen (HBPE) on growth performance, flesh quality, immunity and stress response were investigated. Two hundred fifty‐five rainbow trout (11.141.06g) were fed five diets containing increasing levels of HBPE: control, 0.25HBPE (0.25g HBPE/kg), 0.5HBPE (0.5g HBPE/kg), 1HBPE (1g HBPE/kg) and 1.5HBPE (1.5g HBPE/kg). After 56days, rainbow trout fed the 0.5HBPE and 1HBPE diets displayed significantly higher weight gain (49.58 and 53.25g) and protein efficiency (2.88 and 2.83) compared to those fed the control diet (4.89 and 2.05), respectively (p <.05). For flesh quality, higher protein content in the whole body of fish fed the 1HBPE (633.3g/kg) and 1.5HBPE (640.9g/kg) diets was observed when compared to other groups (p <.05). There were no significant differences in the saturated and monounsaturated fatty acid content. Individuals fed the 1HBPE (234.5g/kg) and 1.5HBPE (234.7g/kg) diets exhibited higher levels of n‐3 long‐chain polyunsaturated fatty acids in the muscle than the other groups (p <.05). In terms of the immune system, the serum lysozyme and alternative complement pathway haemolytic activity levels in the 0.5HBPE (47.66 and 148.00U/ml) and 1HBPE (46.00 and 146.33U/ml) treatments were higher than the other treatments (p <.05). When Aeromonas hydrophila was exposed to different dosages of HBPE, a higher inhibitory zone resulted from 1,000 and 1,500mg/ml dosage. The lower levels of plasma cortisol were observed in the 1HBPE and 1.5HBPE groups after the complement stress test. Collectively, the present findings suggest that the 1HBPE diet supported superior growth, flesh quality, immunity and stress response of rainbow trout.

Item Details

Item Type:Refereed Article
Keywords:aquaculture, herbal medicines, honeybee pollen, immune response, omega 3
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Aquaculture fin fish (excl. tuna)
UTAS Author:Esmaeili, M (Mr Moha Esmaeili)
ID Code:139421
Year Published:2020
Web of Science® Times Cited:8
Deposited By:Fisheries and Aquaculture
Deposited On:2020-06-15
Last Modified:2021-01-27
Downloads:0

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