Determining the geographic origin of milk in Australasia using multi-element stable isotope ratio analysis

Crittenden, Ross; Andrew, Anita S.; LeFournour, M.; Young, Martin D.; Middleton, Heather; Stockmann, Regine

doi:10.1016/j.idairyj.2006.05.012

Cited by 131 publications

(102 citation statements)

References 25 publications

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“…17 The slope value found for milk lipids from farm C was significantly ( p < 0.001) lower, as described above. (Table 3), were about 0.4% lower than those of casein, 15 probably due to the contribution of whey protein, which has a lower content of d 15 N, as demonstrated in previous studies (data not published).…”

Section: Isotopic Values Of Feedsupporting

confidence: 72%

“…25 The different 15 N enrichment observed in the two farms led to significantly ( p < 0.001) different d 15 N values of the relevant milk casein (C ¼ 5.6 AE 0.2%; M ¼ 4.6 AE 0.1%), which were not evident between the two overall diets. It has been reported that the d 15 N of animal tissue is usually less influenced by specific dietary input and more variable due to metabolic factors.…”

Section: Isotopic Values Of Feedmentioning

confidence: 94%

“…For 15 N, probably because it was produced in an area with a hot climate (as observed in Namibia, 31 for example). For the other plants, the differences could be due to different types (e.g.…”

Section: Isotopic Values Of Feedmentioning

confidence: 99%

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mentioning

confidence: 99%

“…The aims of these studies were to obtain dietary reconstruction, to study animal movement patterns, [1][2][3][4][5] and to characterise the geographical origin. [6][7][8][9][10][11][12][13][14][15][16] Another important aim could be to study and quantify the alteration of stable isotope ratios (SIRs) in milk by substituting a C 3 plant diet with maize. This could be important in order to protect milk and milk derivatives produced using traditional or 'organic' practices of pasture compared with products produced with cheaper diets based on maize derivatives.…”

mentioning

confidence: 99%

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Influence of dietary composition on the carbon, nitrogen, oxygen and hydrogen stable isotope ratios of milk

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Perini

Colombari

et al. 2008

Rapid Comm Mass Spectrometry

123

134

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The stable isotope ratios ( 13 C/ 12 C, 15 Recently, several papers have been published about the application of stable isotope ratio analysis (SIRA) using isotopic ratio mass spectrometry (IRMS) to animal products. The aims of these studies were to obtain dietary reconstruction, to study animal movement patterns, 1-5 and to characterise the geographical origin. [6][7][8][9][10][11][12][13][14][15][16] Another important aim could be to study and quantify the alteration of stable isotope ratios (SIRs) in milk by substituting a C 3 plant diet with maize. This could be important in order to protect milk and milk derivatives produced using traditional or 'organic' practices of pasture compared with products produced with cheaper diets based on maize derivatives. There have been recent reports about this in defatted meat, [17][18][19] in related fat, 17 in several animal tissues such as blood, plasma, liver, kidney, cow hair 20 and in sheep faeces. 21 In these papers it was shown that there is a strong correlation between the SIR of carbon and the amount of maize in the diet. It was also shown that the degree of this alteration depends on the component or body tissue considered, due to its biochemical composition and turnover rate. 22 On the other hand, variations in the SIRs in milk and milk derivatives following suitable experimental design have not been so extensively explored. Metges et al. 23 investigated the 13 C/ 12 C of CO 2 breath, bulk milk and serum by exchanging a C 3 plant with a C 4 plant diet, and vice versa. Wilson et al. 24 studied the contribution of body protein to milk protein, changing abruptly from a C 3 to a C 4 diet. More recently, Knobbe et al. 25 followed the variation in stable carbon and nitrogen isotopic composition under different feeding regimes. It was concluded that, to obtain more detailed information on the influencing factors, the analysis of the SIRs of other elements such as oxygen and hydrogen may be necessary.In this study we considered around 130 cows stabled in two farms and supplied with diets made up of different kinds of C 3 plants and different amounts of maize. The different feed ingredients, the overall diet and the relevant milk (casein, lipid and some bulk samples) were subjected to analysis of 13

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Section: Isotopic Values Of Feedsupporting

confidence: 72%

Section: Isotopic Values Of Feedmentioning

confidence: 94%