Open AccessDocosahexaenoic acid (C22:6n‐3) alters cortisol response after air exposure in Prochilodus lineatus (Valenciennes) larvae fed on enriched Artemia
Author(s) -
Araújo F.G.,
Rosa P.V.
Publication year - 2017
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/anu.12490
Subject(s) - docosahexaenoic acid , biology , arachidonic acid , zoology , omnivore , larva , food science , fatty acid , biochemistry , polyunsaturated fatty acid , ecology , predation , enzyme
This study investigated the effect of different proportions of dietary docosahexaenoic acid ( DHA ) and arachidonic acid ( ARA ) on the growth, survival and stress response of curimba ( Prochilodus lineatus Valenciennes) larvae, an omnivorous freshwater species, fed on enriched Artemia . Six different experimental emulsions were formulated to have two levels of ARA (A‐0.5 and A‐1.0), two levels of DHA (D‐0.5 and D‐1.0) two combinations of ARA and DHA ( AD ‐3:1 and AD ‐1:3). There were no significant effects of treatments on curimba standard length and survival at the end of the experiment. The results showed a negative correlation between dietary DHA and whole‐body cortisol after 60 s of air exposure. The resting concentration of cortisol was not affected by the diets ( p = .424). After air exposure, all treatments except for D‐1.0 ( p = .137) and D‐0.5 ( p = .545) exhibited a marked cortisol rise. These results showed that DHA supplementation can have an attenuating effect on cortisol response after air exposure.