Meta-análisis del efecto del pastoreo versus la crianza intensiva en los ácidos grasos saturados en la carne de cordeiro
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abstract
The aim of this study was to measure the effect of pasture vs. indoors rearing on
the content of the saturated fatty acids in lamb meat, using meta-analysis. A total of seventeen
studies concerning the effect of access to pasture in lamb rearing systems on this quality trait
were selected. Based on the high heterogeneity between studies, a random-effects model for
assessing the data was applied. The kind of pasture (pure vs. supplemented) was considered as
covariate. The model indicated that pasture rearing increased (P<0.05) the total amount of the
saturated fatty acids in lamb meat. Lambs grazing pure pasture displayed increased (P<0.01)
saturation of the intramuscular lipids, when compared to the animals receiving supplements
such as concentrates or milk. Concerning the examined trait, the results of this study suggest
certain negative effect of pasture rearing on the healthy quality of lamb meat.