The efficacy of isotope ratio mass spectrometry (IRMS) in tracing lamb production systems was investigated for four farming systems in the Tunisian North-West: Ain Draham and Fernana, characterised by woody pasture, and Amdoun and Joumine, characterised by herbaceous pasture. Mixed breed lambs aged 3.5–5 months were reared under semi-extensive and extensive systems. Samples of Longissimus dorsi muscle were taken from eight lambs for each farming system for stable IR assessment of the five main bio-elements in the protein and fat fractions of lamb and for fatty acid (FA) determination. Using partial least squares discriminant analysis (PLS-DA) the IR profiles of Tunisian lamb types allowed correct assignment of the training meat samples to the area of origin. Inclusion of the FA profile in the classification model slightly improved its evaluation performance for the individual farming systems; the average accuracy increased by 2%–94%. However, the differences between samples were not sufficiently wide to be validated by an external set of samples including 10 Italian lamb types. A broader scale geographical signature discriminating lambs from the Amdoun area, the rest of north-west Tunisia and Italy appeared to be workable, although some foreign lamb types from neighbouring Mediterranean regions such as Sicily were misclassified as Tunisian

Mekki, I.; Camin, F.; Perini, M.; Smetia, S.; Hajji, H.; Mahouachi, M.; Piasentier, E.; Atti, N. (2016). Differentiating the geographical origin of Tunisian indigenous lamb using stable isotope ratio and fatty acid content. JOURNAL OF FOOD COMPOSITION AND ANALYSIS, 53: 40-48. doi: 10.1016/j.jfca.2016.09.002 handle: http://hdl.handle.net/10449/37236

Differentiating the geographical origin of Tunisian indigenous lamb using stable isotope ratio and fatty acid content

Camin, Federica;Perini, Matteo;
2016-01-01

Abstract

The efficacy of isotope ratio mass spectrometry (IRMS) in tracing lamb production systems was investigated for four farming systems in the Tunisian North-West: Ain Draham and Fernana, characterised by woody pasture, and Amdoun and Joumine, characterised by herbaceous pasture. Mixed breed lambs aged 3.5–5 months were reared under semi-extensive and extensive systems. Samples of Longissimus dorsi muscle were taken from eight lambs for each farming system for stable IR assessment of the five main bio-elements in the protein and fat fractions of lamb and for fatty acid (FA) determination. Using partial least squares discriminant analysis (PLS-DA) the IR profiles of Tunisian lamb types allowed correct assignment of the training meat samples to the area of origin. Inclusion of the FA profile in the classification model slightly improved its evaluation performance for the individual farming systems; the average accuracy increased by 2%–94%. However, the differences between samples were not sufficiently wide to be validated by an external set of samples including 10 Italian lamb types. A broader scale geographical signature discriminating lambs from the Amdoun area, the rest of north-west Tunisia and Italy appeared to be workable, although some foreign lamb types from neighbouring Mediterranean regions such as Sicily were misclassified as Tunisian
Tunisian farming systems
Lamb
Meat analysis
Fatty acid composition
IRMS
Meat traceability
Settore CHIM/10 - CHIMICA DEGLI ALIMENTI
2016
Mekki, I.; Camin, F.; Perini, M.; Smetia, S.; Hajji, H.; Mahouachi, M.; Piasentier, E.; Atti, N. (2016). Differentiating the geographical origin of Tunisian indigenous lamb using stable isotope ratio and fatty acid content. JOURNAL OF FOOD COMPOSITION AND ANALYSIS, 53: 40-48. doi: 10.1016/j.jfca.2016.09.002 handle: http://hdl.handle.net/10449/37236
File in questo prodotto:
File Dimensione Formato  
Mekki et al_2016_journal of food compostion and analysis.pdf

solo utenti autorizzati

Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 681.73 kB
Formato Adobe PDF
681.73 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/37236
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 33
  • ???jsp.display-item.citation.isi??? 29
social impact