Skip to main content Accessibility help
×
Home

The metabolism of oleic, linoleic and linolenic acids by sheep with reference to their effects on methane production

  • J. W. Czerkawski (a1), K. L. Blaxter (a1) and F. W. Wainman (a1)

Abstract

1. Nine experiments, each with one of six sheep with cannulated rumens given a constant diet of dried grass, were made in which oleic, linoleic or linolenic acid was infused into the rumen and energy and lipid metabolism were measured. One experiment was made in which palmitic acid was given. 2. Judged by changes in the composition of isolated fatty acids, the unsaturated fatty acids were hydrogenated in the rumen. An increase in the excretion of lipid in the faeces occurred when the unsaturated acids were given. The heat of combustion of the faeces increased by 12.6±3.0 kcal/100 kcal fatty acid, of which 94% was accounted for by the additional lipid. 3. Methane production fell when the unsaturated fatty acids were infused, the decreases being 13.8±1.6 kcal CH4;/I00 kcal oleic acid, 14.2±1.5 kcal CH4/100 kcal linoIeic acid and 16.4±1.3 kcal CH4/100 kcal Iinolenic acid. The introduction of a double bond into an n-alkyl acid was calculated to reduce methane production by 0.24±0.09 moles/mole double bond. 4. Because the depression of methane production on infusing the fatty acids exceeded the increase in the heat of combustion of the faeces, the metabolizable energy of the fatty acids was 104.1±5.3% of their heat of combustion. 5. The efficiencies with which the fatty acids were used to promote energy retention were 74.6±5.7% for oleic acid, 79.2±2.0 % for linoleic acid and 82.5±3.0% for linolenic acid. These efficiencies agreed with those noted in experiments by others with rats, horses and pigs given glycerides, but were higher than those noted by others when glycerides were added to the diets of ruminants.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      The metabolism of oleic, linoleic and linolenic acids by sheep with reference to their effects on methane production
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      The metabolism of oleic, linoleic and linolenic acids by sheep with reference to their effects on methane production
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      The metabolism of oleic, linoleic and linolenic acids by sheep with reference to their effects on methane production
      Available formats
      ×

Copyright

References

Hide All
Armstrong, D. G., Blaxter, K. L. & Graham, N. McC. (1957). Br. J. Nutr. 11, 392.
Armstrong, D. G., Blaxter, K. L. & Graham, N. Mc. (1958). Publs Eur. Ass., Anim. Prod. no. 8, P. 157.
Blaxter, K. L. & Clapperton, J. L. (1965). Br. J. Nutr. 19, 511.
Blaxter, K. L. & Rook, J. A. F. (1953). Br. J. Nutr. 7, 83.
Brouwer, E. (1965). Publs Eur. Ass. Anirn. Prod. no. 11, p. 441.
Carroll, E. J. & Hungate, R. E. (1955). Archs Biochem. 56, 525.
Crampton, E. W. & Maynard, L. A. (1938). J. Nutr. 15, 383.
Czerkawski, J. W. & Blaxter, K. L. (1965). Biochem. J. 96, 25C.
Fingerling, G., Eisenkolbe, P., Hientsch, B., Just, M. & Knaut, G. (1938). Z. Tierernähr. Futtermittelk 1, 183.
Fingerling, G., Köhler, A. & Reinhardt, F. (1914). Landwn VersStnen 84, 149.
Fingerling, G., Nehring, K. & Franke, E. R. (1956). In Festschrift anlässlich des 100 jährigen Bestehens der Landwirtschaftlichen Versuchsstation Leipzig-Möckern, Vol. 3. Untersuchungen über die Verwertung von reinen Nährstoffen and Futterstoffen mit Hilfe von Respirationsversuchen, p. 255. [Nehring, K., editor.] Berlin: Deutscher Bauernverlag.
Folch, J., Lees, M. & Stanley, G. H. S. (1957). J. biol. Chem. 226, 497.
Franke, E. R. (1958). Beiträge aus der Agrikulturchemie zu Problemen der Forschung und Proxis. Wiss. Abhandlungen no. 37, p. 101. Dtsch. Akad. der Landwirt. Berlin.
Garton, G. A., Lough, A. K. & Vioque, E. (1961). J. gen. Microbiol. 25, 215.
Heim, G. (1956). Die Stofliche and energetische Wirkung einer Eiweisszulage sowie einer Zulage bestehend aus Stärke Fett and Eiweiss beim ausgewachsenen Schaf. Diss. Eid. Tech, Hochschule Zurich.
Hoffmann, L., Schiemann, R. & Nehring, K. (1960). Arch. Tierernähr. 10, 299.
Hoffmann, L., Schiemann, R. & Nehring, K. (1961). Arch. Tierernähr. 11, 337.
James, A. T. & Martin, A. J. P. (1952). Biochem. J. 50, 679.
Kates, M. (1964). J. Lipid Res. 5, 132.
Kellner, O. & Köhler, A. (1900). Landwn VersStnen 53, I.
Kharasch, M. S. (1929). Bur. Stand. J. Res. 2, 359.
Kriss, M., Forbes, E. B. & Miller, R. C. (1934). J. Nutr. 8, 509.
Nehring, K., Hoffmann, L., Schiemann, R. & Jentsch, W. (1963). Arch. Tierernähr. 13, 193.
Nehring, K., Jentsch, W. & Schiemann, R. (1961). Arch. Tierernähr. 11, 233.
Schiemann, R., Hoffmann, L. & Nehring, K. (1961). Arch. Tierernähr, 11, 265.
Vercoe, J. E. & Blaxter, K. L. (1965). Br. J. Nutr. 19, 523.
Wainman, F. W. & Blaxter, K. L. (1958). Publs Eur. Ass. Anim. Prod. no. 8, p. 85.
Ward, P. F. V., Scott, T. W. & Dawson, R. M. C. (1964). Biochem. J. 92, 60.
Williams, W. F., Hoernicke, H., Waldo, D. R., Flatt, W. P. & Allison, M. J. (1963). J. Dairy Sci. 46, 992.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed