Using hooves for high-resolution isotopic reconstruction of bovine dietary history

被引:30
作者
Harrison, Sabine M.
Zazzo, Antoine
Bahar, Bojlul
Monahan, Frank J.
Moloney, Aidan P.
Scrimgeour, Charlie M.
Schmidt, Olaf
机构
[1] Univ Coll Dublin, Sch Agr Food Sci & Vet Med, Agr & Food Sci Ctr, Dublin 4, Ireland
[2] Univ Coll Dublin, Sch Biol & Environm Sci, Agr & Food Sci Ctr, Dublin 4, Ireland
[3] TEAGASC, Grange Beef Res Ctr, Dunsany, Meath, Ireland
[4] Scottish Crop Res Inst, Dundee DD2 5DA, Scotland
关键词
FT-RAMAN-SPECTROSCOPY; STABLE-ISOTOPE; RATIO-ANALYSIS; CARBON ISOTOPES; HUMAN HAIR; NITROGEN; CATTLE; ORIGIN; BEEF; TISSUES;
D O I
10.1002/rcm.2861
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
The objective of this study was to ascertain whether sequential sampling and isotopic analysis of bovine hooves could be used to reconstruct the dietary history of cattle. A controlled, on-farm experiment was conducted in which cattle were switched from a barley-based diet to an isotopically different diet incorporating maize, urea and seaweed (the isotopic spacing between diets was 13.6 parts per thousand for delta C-13 and 8.0 parts per thousand for delta N-15) and maintained on that diet for 168 days. Postmortem sampling of the cleaned anterior wall of the lateral, left front claw was carried out on five individuals using a micro-drilling technique. From the first 60 mm of each claw, up to 41 samples with a spacing between them of less than 1 mm were collected. Bands were less than 1 mm deep and had a mean width of 1.2 mm. The hoof keratin showed a rapid increase followed by a slower increase in its 313 C and delta N-15 values following the diet switch, suggesting that C and N in hoof keratin originate from more than one pool. However, the response of the N isotope composition of the hoof was somewhat delayed compared with that of C. Estimated mean hoof growth rates for these cattle were 10.5 +/- 2.3 mm per month and 6.7 +/- 1.0 mm per month (+/- SD, n = 5) when receiving the barley-based transition diet and the maize-based experimental diet, respectively. These values are considerably higher than previous estimates obtained by visual methods and they suggest that diet may have a greater influence on hoof growth rates than seasonality. These results demonstrate that hooves are a suitable incremental tissue for high-resolution isotopic reconstruction of the dietary history of bovine animals. Copyright (c) 2007 John Wiley & Sons, Ltd.
引用
收藏
页码:479 / 486
页数:8
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