Effects of dietary chia polyphenols on fatty acid profile of eggs in heat-stressed Japanese quails

LUCINI MAS AGUSTIN; BONANSEA ROCÍO INÉS; FERNÁNDEZ MARIA EMILIA; KEMBRO JACKELINE MELISSA; LÁBAQUE MARÍA CLARA; WUNDERLIN DANIEL ALBERTO; BARONI MARÍA VERÓNICA

Basel

Congreso; 1st International Electronic Conference on Food Science and Functional Foods.; 2020

Abstract: Global warming is one of the main problems that poultry industry is currently facing, since high temperatures could generate oxidative stress and impact on nutritional quality of its derived products. The aim of this work was to study the effects of dietary supplementation with polyphenols from defatted chia seed cake on the fatty acids composition of eggs from Japanese quail exposed to heat stress. A total of 24 females were randomly assigned into different groups (n=12 per group) according to whether they were fed with standard commercial diet (BASAL) or chia polyphenol supplemented diet (500 mgpolyphenol/Kg or CP500). Half of the animals in each diet group were exposed to 34 °C for 9 hours a day (Heat Stress or HS groups). After 23 days of experimental conditions eggs were collected, and lipids from yolks were extracted. Fatty acid composition (saturated, monounsaturated and polyunsaturated fatty acids or SFA, MUFA and PUFA respectively) was analyzed by gas chromatography and analysis of variance (ANOVA) was performed to evaluate differences between results. Egg yolks of HS-BASAL animals showed higher proportion of C12:0, C13:0 and C20:0, but with no significant differences in ΣSFA respect to those animals that had no heat stress (NHS). Besides, ΣMUFA decreased in HS-BASAL animals (mainly due to the reduction in C18:1 content), and no significant differences were observed in ΣPUFA. Regarding the effect of polyphenols, CP500 helped to decrease ΣSFA and produce an increment of ΣPUFA (specifically C18:3, C20:4, C20:5 and C22:4). In conclusion, the use of defatted chia seed cake seems to be a promising sustainable strategy to improve the nutritional quality of eggs from heat-stressed Japanese quail.