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Relationships between fatty acid status of sow plasma and that of umbilical cord, plasma and tissues of newborn piglets when sows were fed on diets containing tuna oil or soyabean oil in late pregnancy

Published online by Cambridge University Press:  09 March 2007

J. A. Rooke ,
I. M. Bland  and
S. A. Edwards
J. A. Rooke*
Affiliation:
Animal Biology Division, SAC, Craibstone Estate, Aberdeen AB21 9YA, UK
I. M. Bland
Affiliation:
Animal Biology Division, SAC, Craibstone Estate, Aberdeen AB21 9YA, UK
S. A. Edwards
Affiliation:
Animal Biology Division, SAC, Craibstone Estate, Aberdeen AB21 9YA, UK
*
*Corresponding author: Dr John Rooke, fax +44 (0)1224 711292, email [email protected]
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Abstract

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To investigate the relationships between maternal, umbilical cord and piglet fatty acid status, multiparous sows (six per diet) were fed on diets containing supplements (30 g/kg) of either soyabean oil or tuna oil for the last 21 d of pregnancy. The proportions of most fatty acids differed between diets: in particular, the tuna-oil-containing diet supplied more 22:6n-3 and less 18:2n-6 fatty acids than the soyabean-oil-containing diet. Maternal plasma fatty acid concentrations (mg/l) were greater than those in umbilical plasma and 20:4n-6 and 22:6n-3 fatty acids were present in higher proportions (g/100 g fatty acids) in umbilical than maternal plasma. Feeding tuna oil increased the proportionate amounts (g/100 g fatty acids) of total n-3 fatty acids (particularly 22:6n-3) in umbilical cord, plasma and piglet tissues compared with feeding soyabean oil: in contrast, the proportion of 20:4n-6 was decreased by feeding tuna oil. Changes in piglet fatty acid proportions as a result of oil feeding were not influenced by piglet weight. While proportions of the long-chain n-3 and n-6 polyunsaturated fatty acids in piglet liver, spleen and reproductive tract (ovaries plus uterus of the female, testes of the male) correlated well with those of umbilical plasma, those in brain and retina were poorly correlated. Therefore umbilical plasma cannot be used to predict the fatty acid status of piglet brain.

Keywords

PregnancyDietary fatty acidsTissue fatty acidsPig
Type
Research Article
Information
British Journal of Nutrition , Volume 82 , Issue 3 , September 1999 , pp. 213 - 221
Copyright
Copyright © The Nutrition Society 1999

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