Effects of dietary soy saponins and phytosterols on gilthead sea bream (Sparus aurata) during the on-growing period

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

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

Revista

Título: Animal Feed Science and Technology

Vol. 198

Páginas: 203-214

ISSN: 0377-8401

Editora: Elsevier

Indexação

ISI Web of Knowledge - 24 Citações

Scopus - 24 Citações

Classificação Científica

FOS: Ciências agrárias > Ciência animal e dos lacticínios

Outras Informações

ID Authenticus: P-00A-1CC

DOI: 10.1016/j.anifeedsci.2014.09.005

Abstract (EN): Plant ingredients contain antinutritional factors that may affect fish growth performance and health when included in their diets. The present work aimed at studying the effect of two soy purified antinutrients, saponins and phytosterols, on growth, intestinal morphology and immune response of on-growing sea bream. Fish were fed one of seven diets for 48 days: control diet (fishmeal and fish oil based) and six experimental diets containing low (0.1%) or high (0.2%) levels of soya saponins, low (0.5%) or high (1.0%) levels of phytosterols or a combination of 0.1% saponins +0.5% phytosterols or 0.2% saponins +1.0% phytosterols. At day 15 and at the end of the trial pyloric caeca (PC) and distal intestine (DI) samples were collected for histological evaluation. At the end of the trial plasma was sampled for cholesterol analysis and DI was sampled for gene expression of immune and functional genes. Saponins and phytosterols did not affect fish growth, feed utilisation or plasma cholesterol levels. Histologically only a mild increase in the number of eosinophilic granular cells in the PC after 15 and 48 days of feeding in fish fed 0.1% saponins and 0.5% phytosterols, respectively. Gene expression of immune related genes was not affected by the presence of dietary antinutrients. Sea bream in grow-out phase showed high tolerance for saponins and phytosterols either alone or in combination, thus indicating an ability to cope with dietary plant feedstuffs containing such antinutrients, at least within the concentration range used in the present study.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12