Effect of age and food intake on dietary carbon turnover recorded in sheep wool

Rapid Communications in Mass Spectrometry : RCM
A ZazzoOlaf Schmidt

Abstract

We present the results of a series of controlled feeding experiments with sheep, designed to investigate the effects of age and level of food intake on the kinetics of incorporation of the dietary carbon signal into wool. Four different groups of three sheep each, ranging in age from 6 to 78 months, were fed a C(3) diet and switched to a C(4) diet for up to 250 days. Different quantities of the same C(4) diet were provided to each group, in order to achieve different growth rates (high, low, and no growth). Wool was repeatedly shorn from each animal and processed for delta(13)C analyses. Results show that newly grown wool does not start recording the isotope composition of the new diet immediately after the diet-switch. The time-lag varies according to the age of the animal, from 6 +/- 1 days in lambs to up to 15 +/- 4 days in the older ewes. Wool from fast-growing lambs approached equilibrium faster than that from slow-growing lambs and young ewes, with old ewes being the slowest. However, 3 weeks after the diet-switch, the differences in wool delta(13)C values between the four different groups of animals were relatively small and represented less than 15% of the isotopic difference between the two diets. These results suggest...Continue Reading

References

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Citations

Mar 12, 2011·Journal of Agricultural and Food Chemistry·M Teresa OsorioFrank J Monahan
Jan 15, 2014·Metallomics : Integrated Biometal Science·Vincent Balter, Nathalie Vigier
Dec 5, 2012·Journal of the Science of Food and Agriculture·Giuliana VinciSimone Vieri
Aug 6, 2011·Rapid Communications in Mass Spectrometry : RCM·A ZazzoO Schmidt
Feb 16, 2010·Rapid Communications in Mass Spectrometry : RCM·Vincent BalterFrancis Albarède
Mar 5, 2014·Rapid Communications in Mass Spectrometry : RCM·Alexander BraunHans Schnyder
Mar 5, 2014·Rapid Communications in Mass Spectrometry : RCM·I C C von HolsteinM J Collins
Jul 7, 2015·Rapid Communications in Mass Spectrometry : RCM·A ZazzoO Schmidt
Oct 18, 2016·Critical Reviews in Food Science and Nutrition·Caio T Inácio, Phillip M Chalk
May 20, 2016·Rapid Communications in Mass Spectrometry : RCM·Isabella C C von Holstein, Cheryl A Makarewicz
Jul 28, 2016·Food Chemistry·Shumin SunYimin Wei
Nov 5, 2016·The Veterinary Journal·D A F da SilvaR S Ferreira
May 28, 2019·The Journal of Venomous Animals and Toxins Including Tropical Diseases·Rui Seabra FerreiraBenedito Barraviera
Jun 30, 2018·Oecologia·Thure E CerlingShawn J Thomas
Jun 4, 2018·Meat Science·Frank J MonahanAidan P Moloney

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