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Effect of feeding tuna oil or soyabean oil as supplements to sows in late pregnancy on piglet tissue composition and viability

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 j.rooke@ab.sac.ac.uk
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Abstract

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To investigate whether long-chain n-3 polyunsaturated fatty acids could cross the porcine placenta in late pregnancy and alter neonatal piglet tissue composition, multiparous sows (seven per diet) were fed on diets containing a supplement (30 g/kg) of either soyabean oil or tuna oil for the last 21 d of pregnancy and the first 7 d of lactation. The proportions of all fatty acids, except 18:1n-7, 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. The proportions of n-3 fatty acids, particularly 22:6n-3 (g/100 g total fatty acids) in sow plasma, colostrum and milk were increased and the proportion of 18:2n-6 was decreased by feeding tuna oil. Piglet tissue n-3 fatty acid proportions (particularly 22:6n-3), obtained shortly after birth, were increased in piglets born to tuna-oil-fed sows compared with progeny of soyabean-oil-fed sows. The increase in the proportion of n-3 fatty acids (g/100 g total fatty acids) in piglet tissues as a result of tuna-oil feeding, compared with soyabean-oil-feeding, was in the order plasma>liver>erythrocytes>spleen>brain>retina. Piglets born to tuna-oil-fed sows had a lower viability score at birth than the progeny of soyabean-oil-fed sows. The proportions of long-chain n-3 fatty acid in tissues of new-born piglets were increased by feeding tuna oil to the sow in late pregnancy; however no improvements in piglet viability were observed.

Keywords

PregnancyTuna oilTissue fatty acidsPig
Type
Research Article
Information
British Journal of Nutrition , Volume 80 , Issue 3 , September 1998 , pp. 273 - 280
Copyright
Copyright © The Nutrition Society 1998

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