Fatty acids and antioxidants in reindeer and red deer

emphasis on animal nutrition and consequent meat quality

Sampels, Sabine (2005). Fatty acids and antioxidants in reindeer and red deer. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2005:31
ISBN 91-576-7030-7
[Doctoral thesis]

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Abstract

The aim of this thesis was to investigate importance of dietary fatty acids (FA) and animal age and sex on FA metabolism. In addition relation between FA and antioxidants on the consequent nutritional and technological quality of reindeer and red deer meat were addressed. A diet rich in polyunsaturated FA (PUFA) especially long chained n-3 FA (≥C20) has beneficial effects on human health, e.g. in prevention of arteriosclerosis. Game meat is a potential food source that is both lean and rich in n-3 PUFA, however different animal production systems can affect its natural FA composition. In the present studies on reindeer and red deer, that were either grazing or fed with pellets, meat from grazing animals had higher amounts of n-3 PUFA and lower n-6/n-3 ratio. Our results from feeding studies indicate that reindeer are unable to sufficiently elongate and desaturate towards 22:5n-3 and 22:6n-3, and indicate that dietary intake of C 22 PUFA is necessary for reindeer. The differences in FA composition between grazing reindeer of different sex and age were ascribed mainly to fatness. FA composition of the meat influences not only its nutritional quality but also other quality aspects such as shelf life and processing stability. The higher degree of unsaturation of FA is, the more prone to oxidation they are. Therefore the antioxidant status in the animals is important for the protection of the meat against oxidation. The studies on processed and stored meat showed that changes in FA composition and antioxidant content influenced its processing stability and shelf life. α-Tocopherol status had a greater impact on lipid oxidation and colour stability than did changes in FA composition. In contrast to lipid oxidation, decreasing colour stability and increasing amounts of free FA were found to be the first indicators of quality deterioration. The knowledge from the present thesis adds valuable information on lipid metabolism of ruminants, demonstrated in reindeer.

Authors/Creators:

Sampels, Sabine

Title:

Fatty acids and antioxidants in reindeer and red deer

Subtitle:

emphasis on animal nutrition and consequent meat quality

Series Name/Journal:

Acta Universitatis Agriculturae Sueciae

Year of publishing :

2005

Number:

2005:31

Number of Pages:

Papers/manuscripts:

Number

References

ALL

I. Sampels, S., Pickova, J. & Wiklund, E. (2004). Fatty acids, antioxidants and oxidation stability of processed reindeer meat. Meat Science, 67, 523-532. II. Wiklund, E., Sampels, S., Manley, T.R., Pickova, J. and Littlejohn, R.P. Effects of feeding regimen and chilled storage on water holding capacity, colour stability, pigment content and oxidation in red deer (Cervus elaphus) meat. Journal of the Science of Food and Agriculture, accepted. III. Sampels, S., Pickova, J. & Wiklund, E. Fatty acid composition and vitamin E and A content of M. longissimus dorsi from reindeer of different age and sex grazing on natural pasture and fed two different diets. Submitted. IV. Sampels, S., Pickova, J., & Wiklund, E. Influence of production system, age and sex on carcass parameters and some biochemical meat quality characteristics of reindeer (Rangifer tarandus tarandus L.). Submitted.

Place of Publication:

Uppsala

ISBN for printed version:

91-576-7030-7

ISSN:

1652-6880

Language:

English

Publication Type:

Doctoral thesis

Full Text Status:

Public

Agris subject categories.:

L Animal production > L51 Animal physiology - Nutrition
Q Food science > Q04 Food composition

Subjects:

Not in use, please see Agris categories

Agrovoc terms:

reindeer, cervus elaphus, fatty acids, antioxidants, tocopherols, lipid metabolism, diet, animal nutrition, game meat, quality, chemical composition

Keywords:

α-tocopherol, Cervus elaphus L., desaturation, human nutrition, lichen, linseed, lipid classes, phospholipids, Rangifer tarandus tarandus L., squalene, n-6/n-3 ratio

URN:NBN:

urn:nbn:se:slu:epsilon-610

Permanent URL:

http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-610

ID Code:

800

Department:

(NL, NJ) > Dept. of Food Science (until 161231)

Deposited By:

Sabine Sampels

Deposited On:

08 Apr 2005 00:00