Dietary saponins and phytosterols do not affect growth, intestinal morphology and immune response of on‐growing European sea bass (Dicentrarchus labrax)
This study was the first to investigate the effect of soy antinutrients, saponins and phytosterols, in on‐growing sea bass. Seven diets were formulated: a control diet (fishmeal and fish oil based) and six diets containing 1 or 2 g kg⁻¹ levels of soya saponins, 5 or 10 g kg⁻¹ levels of phytosterols...
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Published in | Aquaculture nutrition Vol. 21; no. 6; pp. 970 - 982 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Oxford
Blackwell Science
01.12.2015
Blackwell Publishing Ltd Hindawi Limited |
Subjects | |
Online Access | Get full text |
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Summary: | This study was the first to investigate the effect of soy antinutrients, saponins and phytosterols, in on‐growing sea bass. Seven diets were formulated: a control diet (fishmeal and fish oil based) and six diets containing 1 or 2 g kg⁻¹ levels of soya saponins, 5 or 10 g kg⁻¹ levels of phytosterols or a combination of 1 g kg⁻¹ saponins + 5 g kg⁻¹ phytosterols or 2 g kg⁻¹ saponins + 10 g kg⁻¹ phytosterols. After a 59 days feeding trial fish were weighed, faeces collected for digestibility studies and plasma sampled for cholesterol quantification. At day 15 and 59, distal intestine (DI) samples were collected for histological evaluation and quantification of maltase (Malt), alkaline phosphatase (AlP) and leucine aminopeptidase (LAP) activities. At day 59, DI was collected for gene expression of AlP, Malt and immune related genes. Antinutrients had no effect on fish performance, digestibility, plasma cholesterol levels and digestive enzymes activities and gene expression. Only mild morphological changes were present in groups fed high levels of saponins + phytosterols. Expression of immune related genes showed no differences between groups. Overall, on‐growing sea bass showed high tolerance to dietary antinutrients up to the levels tested. |
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Bibliography: | http://dx.doi.org/10.1111/anu.12220 Aquaculture Protein Centre, Norwegian School of Veterinary Science, a center of excellence under the Norwegian Research Council - No. 145949/120 ArticleID:ANU12220 Fundação para a Ciência e a Tecnologia - No. SFRH/BD/47495/2008 istex:DE626A628886656D189E0BFE6CD67603AD5F0933 ark:/67375/WNG-6XFXGX1R-J ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1353-5773 1365-2095 |
DOI: | 10.1111/anu.12220 |