PMID: 9161910May 1, 1997Paper

Machine milking of Ostfriesian and Lacaune dairy sheep: udder anatomy, milk ejection and milking characteristics

The Journal of Dairy Research
R M BruckmaierD Schams

Abstract

Mammary cistern anatomy derived from ultrasound measurement, milk ejection in response to exogenous oxytocin and oxytocin release and milking characteristics with and without manual prestimulation in early (months 2-4) and late (months 5-8) lactation were investigated in Lacaune and Ostfriesian dairy ewes. Vertical ultrasound cisternal cross sections of the cisternal cavities did not differ in the two breeds, whereas the cisternal area fraction located lower than the exit into the teat channel was larger in Ostfriesian than in Lacaune sheep. The cisternal area enlarged within 1 min in response to i.v. oxytocin injection, indicating milk ejection. During milking, oxytocin concentrations in Lacaune generally increased dramatically within 0.5 min from the start of prestimulation or milking, whereas only slight or no oxytocin release was detected during milking without prestimulation in Ostfriesian ewes. Prestimulation induced oxytocin release in Ostfriesian sheep within 1-2 min after the start of milking, indicating delayed response to stimulation. Two peaked milk flow curves were observed when oxytocin release and milk ejection occurred only after removal of cisternal milk. This type of milk flow was more frequent in Ostfriesian ...Continue Reading

Citations

Apr 11, 2001·Small Ruminant Research : the Journal of the International Goat Association·M J. ZamiriJ Izadifard
Apr 7, 2015·Journal of Dairy Science·J Bueso-RódenasJ R Díaz
Jan 24, 2015·Journal of Human Lactation : Official Journal of International Lactation Consultant Association·Hazel GardnerDonna T Geddes
May 21, 2005·Journal of Dairy Science·A Legarra, E Ugarte
May 22, 1998·Journal of Dairy Science·R M Bruckmaier, J W Blum
May 23, 2002·Journal of Dairy Science·B C McKusickD L Thomas
Sep 9, 2010·The Journal of Dairy Research·Sarah AmbordRupert M Bruckmaier
Jul 10, 2019·Animal : an International Journal of Animal Bioscience·A DzidicP G Marnet

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