Macro- and microalgal extracts as functional feed additives in diets for zebrafish juveniles

被引:4
|
作者
Monteiro, Marta [1 ,2 ]
Lavrador, Ana S. [1 ]
Oliva-Teles, Aires [1 ,2 ]
Couto, Ana [1 ,2 ]
Carvalho, Antonio Paulo [1 ,2 ]
Enes, Paula [1 ,2 ]
Diaz-Rosales, Patricia [1 ,3 ]
机构
[1] Univ Porto, Ctr Interdisciplinar Invest Marinha & Ambiental C, Matosinhos, Portugal
[2] Univ Porto, Fac Ciencias, Dept Biol, Porto, Portugal
[3] Ctr Invest Sanidad Anim CISA, INIA, Inmunol & Patol Peces, Madrid, Spain
关键词
algal extracts; functional feed additives; growth performance; immunomodulation; zebrafish; FISH-MEAL REPLACEMENT; SKELETAL-MUSCLE GROWTH; PLANT PROTEIN-SOURCES; RAINBOW-TROUT; IMMUNE-RESPONSE; GRADED-LEVELS; ULVA-RIGIDA; SEA BREAM; QUANTITATIVE EXPRESSION; SPIRULINA-PLATENSIS;
D O I
10.1111/are.15507
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
The search for natural immunotherapeutic agents has become increasingly important for fish disease treatment and prophylaxis. The present research explored the effects of macro- and microalgal extracts on zebrafish juvenile growth and immune status. A plant-based diet was used as a control (diet C), and seven other diets were prepared similar to diet C, supplemented with 10 g Kg(-1) of each algal extract (Fucus vesiculosus, F; Nannochloropsis gaditana, N; and Ulva rigida, U), or a combination of extracts (diets FN, FU, NU and FNU). A fishmeal-based diet was included as a positive control (diet C+). Diet C+ outperformed the remaining dietary treatments, growth-wise. None of the extracts improved diet C negative effects. However, the inclusion of U. rigida and N. gaditana extracts promoted an immunomodulatory action after 1 week of trial, by upregulating cytokine expression. This effect subsided after 30 days, suggesting tolerance may be developed over time. In contrast, effects on growth-related genes were still observed after 5 weeks of feeding F, N, U and FN diets. Algal extract dietary inclusion did not compromise intestinal integrity. These findings support the potential of algal extracts as functional feed additives during short periods (<30 days) to enhance immunomodulation.
引用
收藏
页码:6420 / 6433
页数:14
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