Effect of live weight pre and post-lambing on milk production of East Friesian sheep

dc.creatorANGELES HERNANDEZ, JUAN CARLOS; 328847
dc.creatorRadic Schilling, Sergio;x1241231
dc.creatorVera Arias, Marcela;x1241232
dc.creatorEcheverría Pérez, Ricardo;x1241233
dc.creatorCASTELAN ORTEGA, OCTAVIO ALONSO; 21079
dc.creatorRAMIREZ PEREZ, AURORA HILDA; 44330
dc.creatorGonzález Ronquillo, Manuel; 26128
dc.creatorANGELES HERNANDEZ, JUAN CARLOS
dc.creatorRadic Schilling, Sergio
dc.creatorVera Arias, Marcela
dc.creatorEcheverría Pérez, Ricardo
dc.creatorCASTELAN ORTEGA, OCTAVIO ALONSO
dc.creatorRAMIREZ PEREZ, AURORA HILDA
dc.creatorGonzález Ronquillo, Manuel
dc.date2018-03-07T23:59:12Z
dc.date2018-03-07T23:59:12Z
dc.date2017-07-01
dc.identifier1594-4077
dc.identifierhttp://hdl.handle.net/20.500.11799/79740
dc.descriptionThe study was conducted to analyse the effect of sheep body weight (BW) at mating, mid-preg- nancy, lambing, early lactation, mid-lactation and late lactation on milk yield and patterns of milk production. Also, the effects of environmental factors such as number of lambing (NL) and type of lambing (TL) on BW and milk production were analysed. A total of 52 multiparous East Friesian ewes from an experimental flock were used. Ewes were assigned to three different groups accord- ing to their BW at each productive stage: low (LBW), moderate (MBW) and high BW (HBW). Lactations were fitted using the mechanistic model described by Pollott. Total milk yield (TMY), peak yield (PY) and time at peak yield (TPY) were also calculated. HBW ewes had consistently higher TMY (p<.001) and PY (p<.05) values, than LBW and MBW in most of productive stage measured. There was a positive linear relationship (p < .05) between TMY and BW in all-productive stage, except at mid-gestation where the relationship was quadratic. HBW ewes weighted at mid- pregnancy showed the highest values of maximum secretion parameter (p 1⁄4 .04) of Pollott model, which could partially explain the better milk yield of HBW ewes. A significant effect of NL on BW (p1⁄4.007) and TMY (p1⁄4.007) was observed. The BW ewe’s in pregnancy and early lactation is a useful indicator at farm level to improve the milk yield performance in dairy sheep.
dc.descriptionMr. Angeles Hernandez thank the National Council for Science and Technology (CONACyT, Mexico) for the scholar- ship for their studies in the Universidad Nacional Autonoma de Mexico, Dr. Gonzalez Ronquillo was granted with a Beca Alianza del Pacifico 2014 fellowship.
dc.languageeng
dc.publisherItalian Journal of Animal Science
dc.relationVol.;17
dc.relationNo.;1
dc.rightsopenAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectMilk yield
dc.subjectdairy ewe
dc.subjectpregnancy
dc.subjectlive body weight
dc.subjectBIOLOGÍA Y QUÍMICA
dc.titleEffect of live weight pre and post-lambing on milk production of East Friesian sheep
dc.typeArtículo
dc.typearticle


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