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A short pulse of dietary algae boosts immune response and modulates fatty acid composition in juvenile Oreochromis niloticus
Author(s) -
GarcíaMárquez Jorge,
Rico Rosa María,
SánchezSaavedra M. del Pilar,
GómezPinchetti Juan Luis,
Acién Francisco Gabriel,
Figueroa Félix L.,
Alarcón Francisco Javier,
Moriñigo Miguel Ángel,
AbdalaDíaz Roberto Teófilo
Publication year - 2020
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.14781
Subject(s) - biology , eicosapentaenoic acid , oreochromis , algae , nile tilapia , docosahexaenoic acid , arachidonic acid , fatty acid , food science , zoology , polyunsaturated fatty acid , biochemistry , fishery , botany , fish <actinopterygii> , enzyme
Considering algae as novel dietary ingredient for aquafeeds, this study evaluates the effects of three algae, Ulva rigida , Crassiphycus corneus (formerly Hydropuntia cornea ) and Scenedesmus almeriensis , on non‐specific immune response and fatty acid profile in juvenile Nile tilapia ( Oreochromis niloticus ) after a short dietary administration period (30 days). U. rigida , C. corneus and S. almeriensis diets (UL‐25, CC‐25 and SC‐25 respectively) included 25% dry algae biomass, whereas an algae‐free diet was used as control. Biological samples were taken at 7, 15 and 30 days. Diet SC‐25 significantly improved respiratory burst, alternative complement (ACH50) and lysozyme activity ( p < .05). Regarding tissue fatty acid composition, SC‐25 diet reduced the levels of saturated fatty acid in liver and muscle, while increased levels of C20:3n6 and eicosapentaenoic acid (EPA) in liver, and total n‐3 content, arachidonic acid (ARA), EPA and docosahexaenoic acid (DHA) in muscle ( p < .05). UL‐25 and CC‐25 groups showed the lowest levels of ARA in liver but increased levels of monounsaturated fatty acids. In conclusion, the results obtained lead us to consider the use of a short pulse of dietary algae is suited for improving the immune response and modulating the tissue fatty acid composition in this fish species.