期刊
AQUACULTURE NUTRITION
卷 24, 期 5, 页码 1381-1392出版社
WILEY
DOI: 10.1111/anu.12675
关键词
animal welfare; fish; feed additive; metabolism; natural products; stress
类别
资金
- Spanish Ministry of Science and Education [AGL2013-48835-C2-R, AGL2016-76069-C2-1-R]
- Spanish Ministry of Education, Economy and Competitiveness (MINECO)
- CAPES (Ministry of Education of Brazil, Brazil)
- PDSE-CAPES (Programa Institucional de Bolsas de Doutorado Sanduiche no Exterior) [5055/14-8]
- CNPq
The effects of diet supplemented with Myrcia sylvatica essential oil (EOMS) on growth and stress tolerance to different stocking densities were assessed in Sparus aurata. Initially, three experimental groups were established: (i) control, (ii) 1.0 and (iii) 2.0 ml EOMS/kg dry feed. After 90 days, nine fish per group were anaesthetized, weighed and sampled for metabolic analysis. The remaining fish were divided into two different conditions: low (LD-5 kg/m(3)) and high (HD-40 kg/m(3)) stocking densities, constituting a final experimental setup with six treatments. After 22 days, 10 individuals per treatment were anaesthetized and sampled for biochemical analysis. EOMS feeding for 90 days did not interfere with growth, although it was effective in reducing cortisol levels and the activation of lipid and carbohydrate metabolism. The HD interfered in growth performance, increased the lactate levels in the control group, reducing also hepatic glycogen levels without dependence on diet supplementation. The 2.0 ml EOMS + LD group increased the growth parameters and decreased the cortisol and triglycerides levels. Additionally, metabolism adjustment was observed to provide energy during LD and HD conditions, indicating that diets supplemented with EOMS produce metabolic reorganization to maintain body homeostasis, suggesting its use as a beneficial supplement in fish.
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