Ambient temperature and nutritional stress influence fatty acid composition of structural and fuel lipids in Japanese quail (Coturnix japonica) tissues

2013 ◽  
Vol 166 (2) ◽  
pp. 244-250 ◽  
Author(s):  
Miriam Ben-Hamo ◽  
Marshall D. McCue ◽  
Inna Khozin-Goldberg ◽  
Scott R. McWilliams ◽  
Berry Pinshow
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Ambient Temperature ◽  
Acid Composition ◽  
Japanese Quail ◽  
Nutritional Stress ◽  
Coturnix Japonica ◽  
Stress Influence

Fatty acid composition of ewe milk as affected by solar radiation and high ambient temperature

2002 ◽  
Vol 69 (2) ◽  
pp. 181-194 ◽  
Author(s):  
AGOSTINO SEVI ◽  
TADDEO ROTUNNO ◽  
ROBERTO DI CATERINA ◽  
ANTONIO MUSCIO
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Solar Radiation ◽  
Ambient Temperature ◽  
Acid Composition ◽  
Milk Fat ◽  
Saturated Fatty Acids ◽  
High Ambient Temperature ◽  
Short Chain ◽  
Feeding Time

Forty lactating Comisana ewes were either exposed to or protected from solar radiation and fed either in the morning or afternoon during summer in a Mediterranean climate. Individual milk samples were taken on days 7, 21 and 42 of the study period to determine fatty acid composition by gas chromatography. Exposure to solar radiation resulted in higher proportions of short-chain and saturated fatty acids in milk, primarily because of increased contents of caproic, capric, lauric, myristic and stearic acids (by 3–18%), and decreased contents of oleic, linoleic and linolenic acids (by 2–9%). As a consequence, the long to short chain and the unsaturated to saturated fatty acid ratios were significantly higher by 4 and 13% respectively in the milk of the protected ewes compared with that of the exposed animals. Provision of shade also led to an increase in the 18[ratio ]0+18[ratio ]1 to 16[ratio ]0 ratio, and to a decrease in the 12[ratio ]0+14[ratio ]0+16[ratio ]0 fatty acid group, which are regarded as reliable indexes of the nutritional property of dietary fat in reducing cholesterol levels in human plasma. Feeding time had little impact on milk fat. Our findings suggest that high ambient temperature may markedly modify the lipid composition of ewe milk and that provision of shade, but not feeding management, can improve the milk fatty acid profile in dairy sheep raised in hot climates.

Sign in / Sign up

Export Citation Format

Share Document