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Feeding tuna oil to the sow at different times during pregnancy has different effects on piglet long-chain polyunsaturated fatty acid composition at birth and subsequent growth

Published online by Cambridge University Press:  09 March 2007

J. A. Rooke ,
A. G. Sinclair  and
S. A. Edwards
J. A. Rooke*
Affiliation:
Animal Biology Division, Scottish Agricultural College, Craibstone Estate, Aberdeen AB21 9YA, UK
A. G. Sinclair
Affiliation:
Animal Biology Division, Scottish Agricultural College, Craibstone Estate, Aberdeen AB21 9YA, UK
S. A. Edwards
Affiliation:
Animal Biology Division, Scottish Agricultural College, Craibstone Estate, Aberdeen AB21 9YA, UK
*
*Corresponding author: Dr J. A. Rooke, fax +44 (0) 1224 711292, email j.rooke@ab.sac.ac.uk
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Abstract

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In an attempt to prevent decreases in piglet 20 : 4n-6 status at birth while increasing 22 : 6n-3 status, multiparous sows (eight per treatment) were allocated to one of three different treatments: a basal diet fed from day 63 of pregnancy to term; basal diet supplemented with tuna oil (17·5 g/kg) from day 63 to day 91 and then basal diet alone from day 92 to term; basal diet alone from day 63 to day 91 and then basal diet supplemented with tuna oil from day 92 to term. Tuna oil supplementation increased mainly 22 : 6n-3 intake. Supplementation with tuna oil between day 92 and term increased 22 : 6n-3 to a greater extent in all piglet tissues (brain, liver, retina and the remaining carcass) at birth than supplementation with tuna oil between days 63 and 91. However, while piglet 20 : 4n-6 decreased to a greater extent in liver and carcass when diets were supplemented with tuna oil between days 92 and term than between days 63 and 91, in the brain and retina, the reverse was true; 20 : 4n-6 was decreased to a greater extent between days 63 and 91 than between 92 and term. The effect of pregnancy nutrition on the growth of piglets until 7 d postweaning (35 d of age) was assessed after removing any residual effects of pregnancy treatment by cross-fostering some piglets at birth. Piglets, the diets of whose dams had been supplemented with tuna oil during pregnancy, grew faster during the first 35 d of life than the progeny of sows fed only the basal diet. Feeding tuna oil to sows at different times during pregnancy therefore did not prevent decreases in piglet 20 : 4n-6 status at birth, but did suggest that changes in piglet brain 20 : 4n-6 status between days 63 and 91 of pregnancy were not reversible by later nutrition. Supplementing the diet of the pregnant sow with tuna oil had beneficial effects on postnatal piglet growth.

Keywords

PregnancyDietary fatty acidsPiglet tissue fatty acids
Type
Research Article
Information
British Journal of Nutrition , Volume 86 , Issue 1 , July 2001 , pp. 21 - 30
Copyright
Copyright © The Nutrition Society 2001

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