Fatty acid composition and oxidative stability of oils recovered from acid silage and bacterial fermentation of fish (Sea bass - Dicentrarchus labrax) by-products

Ozyurt G., ÖZKÜTÜK A. S., UÇAR Y., DURMUŞ M., ÖZOĞUL Y.

INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY, vol.53, no.5, pp.1255-1261, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 53 Issue: 5
  • Publication Date: 2018
  • Doi Number: 10.1111/ijfs.13705
  • Journal Name: INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1255-1261
  • Keywords: Acid silage, fatty acids, LAB strains, oxidative evaluation, EXTRACTION, LIPIDS
  • Çukurova University Affiliated: Yes

Abstract

Lipid quality and fatty acid compositions of fish oils recovered from fish (Sea bass - Dicentrarchus labrax) waste silages produced with formic acid (FA) and five different LAB strains (Lactobacillus plantarum (LP), Pediococcus acidilactici (PA), Enterococcus gallinarum (EG), Lactobacillus brevis (LB) and Streptococcus spp. (ST)) were assessed to ensure for the usage for human consumption. Generally, it was observed that there were no significant differences between PUFA contents (23.27-23.64%). Peroxide (PV) (2.12meq active O-2/per kg of oil) and TBA values (1.07mg malonaldehyde (MA)g(-1) oil) of fish oils from acid silage were significantly higher than those of the fermented ones (1.14-1.91meq active O(2)kg(-1), 0.67-0.81mgMAg(-1) oil, respectively). Anisidine values (AV) were determined in range of 8.04-11.14 for fermented silages and 13.08 from acid silage. The highest totox value (17.33 +/- 0.88) was also detected in acid silage oil whereas fermented groups gave totox value in the range of 10.40-13.88. It can be concluded that the initial lipid quality of fermented fish waste silages was better than the initial lipid quality of acid fish waste silage. Therefore, fish oils recovered from fermented silages can be used as food additives or supplements for animal and human diets.