Effects of seasonal changes in feeding management under part-time grazing on terpene concentrations of ewes' milk.
Terpene composition of ewes' raw milk from nine commercial flocks was analysed from February to July. Ewes' diet consisted of concentrate and conserved forage in winter (indoor feeding) and part-time grazing from spring (transition and outdoor feeding). Regardless of the feeding, limonene and β-phellandrene were the most abundant monoterpenes and β-caryophyllene showed the highest concentrations among sesquiterpenes. Terpene content increased in the milks of commercial flocks when animals were reared under grazing management. Monoterpenes were detected in the milks of all the commercial flocks throughout the season, whereas sesquiterpenes were only detected in the milks from flocks grazing on non-cultivated community-owned grasslands in which a higher biodiversity of plant species grew. These preliminary results indicated that β-caryophyllene could be a potential pasture-diet marker in the case of milks from animals grazing a higher biodiversity of plant species but in-depth studies including information on terpene composition of plants ingested by the animals are necessary to evaluate the suitability of β-caryophyllene or another terpenoid compound as pasture biomarker.
Technología de Alimentos, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
Eunate
E
Abilleira
Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
Mailo
M
Virto
Technología de Alimentos, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
Ana Isabel
AI
Nájera
Nutrición y Bromatología, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
Marta
M
Albisu
Nutrición y Bromatología, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
Francisco José
FJ
Pérez-Elortondo
Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
Juan Carlos
JC
Ruiz de Gordoa
Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
Mertxe
M
de Renobales
Technología de Alimentos, Facultad de Farmacia, Universidad del País Vasco/Euskal Herriko Unibertsitatea, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
Luis Javier R
LJ
Barron
D000821:Animal Feed / Q000032:analysis; D000822:Animal Husbandry / Q000379:methods*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004032:Diet / Q000662:veterinary; D005260:Female; D008892:Milk / Q000737:chemistry*; D012621:Seasons; D012756:Sheep / Q000502:physiology*; D013729:Terpenes / Q000737:chemistry*
D013729:Terpenes