Dietary saponins and phytosterols do not affect growth, intestinal morphology and immune response of on-growing European sea bass (Dicentrarchus labrax)

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Couto, A (Author) Other; Kortner, TM (Author) Other; Penn, M (Author) Other; Bakke, AM (Author) Other; Krogdahl, A (Author) Other; Oliva Teles, A (Author) FCUP

Journal

Title: Aquaculture Nutrition

Vol. 21

Pages: 970-982

ISSN: 1353-5773

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 15 Citations

Scopus - 19 Citations

Scientific classification

FOS: Agrarian Sciences > Agriculture, Forestry, and Fisheries

Other information

Authenticus ID: P-00G-2BQ

DOI: 10.1111/anu.12220

Abstract (EN): 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 2gkg(-1) levels of soya saponins, 5 or 10gkg(-1) levels of phytosterols or a combination of 1gkg(-1) saponins+5gkg(-1) phytosterols or 2gkg(-1) saponins+10gkg(-1) phytosterols. After a 59days 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13