Journal
ANIMAL PRODUCTION SCIENCE
Volume 56, Issue 5, Pages 815-823Publisher
CSIRO PUBLISHING
DOI: 10.1071/AN14743
Keywords
chicken; DHA; EPA; growth; nutrition; omega-3 fats
Categories
Funding
- South Australian Department of Further Education, Employment, Science and Technology Constellation SA program
- FOODplus Research Centre, School of Agriculture Food and Wine, The University of Adelaide
- National Health and Medical Research Council of Australia (NHMRC)
- NHMRC
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We have previously demonstrated that feeding chickens a diet containing high levels of the n-3 PUFA -linolenic acid (ALA) significantly increases the content of the principal omega-3 long-chain polyunsaturated fatty acids, eicosapentaenoic acid and docosahexaenoic acid, in their meat and eggs. However, the effect of the diet on production characteristics of the birds has not been assessed. This study aimed to determine the effect of feeding male and female Cobb 500 broilers (n = 3840) a high ALA diet (containing 2.5% flaxseed oil) compared with a standard commercial Control diet (containing 2.5% tallow) on growth, feed conversion ratio and mortality until 6 weeks of age. As expected the dietary flaxseed oil significantly increased breast meat levels of omega-3 polyunsaturated fatty acids (similar to 4-fold), with most eicosapentaenoic acid and docosahexaenoic acid being deposited in the phospholipid fraction. Both male and female birds fed the high ALA diet were significantly heavier at 6 weeks of age (77 g heavier in females, 87 g heavier in males). They also had a significantly (10%) lower feed conversion ratio, and a mortality rate that was not different from the Control diet across the 6-week feeding period. These findings indicate that a high ALA diet has the potential to enrich chicken breast meat with eicosapentaenoic acid and docosahexaenoic acid without loss of growth rate or feed efficiency, or increase in fat content of breast meat.
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