Effects of dietary retinol acetate on growth performance, skin mucus immune responses and haematological parameters of Caspian roach (Rutilus caspicus)

Three retinol acetate (vitamin A)‐supplemented diets containing 0, 5,000, 10,000 IU kg−1 diet (in dry weight) were fed twice daily to triplicate groups (50 fish/group) of Caspian roach (Rutilus caspicus) (1.91 ± 0.07 g) for 40 days. At the end of feeding trial, skin mucus antimicrobial activity agai...

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Bibliographic Details
Published inAquaculture nutrition Vol. 23; no. 5; pp. 893 - 898
Main Authors Sharifian, M., Hajimoradloo, A., Ghorbani, R., Hoseinifar, S.H.
Format Journal Article
LanguageEnglish
Published Oxford Hindawi Limited 01.10.2017
Subjects
Acetates
antibacterial activity
Blood cells
Caspian roach (Rutilus caspicus)
Defence mechanisms
Diet
Dry weight
E coli
Evaluation
Feeding experiments
Fish
Fish skin
Freshwater fishes
Growth rate
haematological parameters
Hematology
Immune response
Immunity
mucosal immunity
Mucus
Parameters
Physical growth
Proteins
Retinol
Rutilus caspicus
Vitamin A
Vitamins
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Summary:Three retinol acetate (vitamin A)‐supplemented diets containing 0, 5,000, 10,000 IU kg−1 diet (in dry weight) were fed twice daily to triplicate groups (50 fish/group) of Caspian roach (Rutilus caspicus) (1.91 ± 0.07 g) for 40 days. At the end of feeding trial, skin mucus antimicrobial activity against Streptococcus faecium, Serratia marcescens, Staphylococcus aureus and Escherichia coli as well as soluble protein level, growth performance and haematological parameters was evaluated. Growth performance including final weight, weight gain, specific growth rate and food conservation ratio as well as the survival rate showed no significant differences between vitamin A‐supplemented diets and control groups (p > .05). The results revealed that the administration of 10,000 IU vitamin A kg−1 significantly increased skin mucus antibacterial activity (p < .05). Furthermore, the soluble protein level of skin mucus was found to be significantly elevated in roach fed diet containing 10,000 IU vitamin A kg−1 (p < .05). Evaluation of haematological parameters revealed no significant difference (p > .05), except white blood cell counts that were significantly higher in vitamin A‐fed roach (p < .05). The results of the present study indicate that dietary vitamin A can modulate mucosal immune response of Caspian roach.
ISSN:1353-5773
1365-2095
DOI:10.1111/anu.12456