Dietary Oil Sources on the Innate Immunity and Resistance of Nile Tilapia,  Oreochromis niloticus , to  Streptococcus agalactiae  Challenge | Zendy

Ferreira Milena W. | Zendy; Costa Diego V. da | Zendy; Leal Carlos A. G. | Zendy; Figueiredo Henrique C. P. | Zendy; Rosa Priscila V. | Zendy

Open Access

Dietary Oil Sources on the Innate Immunity and Resistance of Nile Tilapia, Oreochromis niloticus , to Streptococcus agalactiae Challenge

Author(s) -

Ferreira Milena W.,

Costa Diego V. da,

Leal Carlos A. G.,

Figueiredo Henrique C. P.,

Rosa Priscila V.

Publication year - 2015

Publication title -

journal of the world aquaculture society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.655

H-Index - 60

eISSN - 1749-7345

pISSN - 0893-8849

DOI - 10.1111/jwas.12192

Subject(s) - oreochromis , nile tilapia , biology , streptococcus agalactiae , lysozyme , fish oil , food science , tilapia , linseed oil , zoology , microbiology and biotechnology , fishery , biochemistry , fish <actinopterygii> , bacteria , streptococcus , genetics

The effect of different dietary oil sources on the innate immunity and resistance of Nile tilapia, Oreochromis niloticus , to Streptococcus agalactiae infection were evaluated. Fish were fed with diets containing different lipid sources (soybean oil [ SO ], corn oil, linseed oil [ LO ], fish oil [ FO ], and olive oil [ OO ]). Fish fed SO presented the highest ( P < 0.05) hematocrit and serum protein. LO and FO diets increased ( P < 0.05) the erythrocyte resistance to osmotic lysis in comparison with other treatments. Fish fed OO showed the highest ( P < 0.05) iron‐binding capacity and the lowest serum lysozyme and bactericidal activities ( P < 0.05). No difference ( P > 0.05) was found between diets in alternative complement activity. Fish fed the SO diet had the highest ( P < 0.05) survival rate against S. agalactiae challenge. In conclusion, diets with LO oil and FO , rich in ω‐3 fatty acids, and OO , rich in ω‐9 fatty acids, have an immunomodulatory effect in Nile tilapia juveniles. The use of SO in the Nile tilapia diet improved immune function and resistance against S. agalactiae .

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