Reduced claw vacuum and b-phase during low milk flow does not impact oxytocin release and milking performance.

Neuheuser, Anna-Lena; Schwinn, Ann-Catherine Silvia; Wellnitz, Olga; Hernandez Castellano, Lorenzo Enrique; Bruckmaier, Rupert (2018). Reduced claw vacuum and b-phase during low milk flow does not impact oxytocin release and milking performance. Journal of dairy research, 85(1), pp. 70-77. Cambridge University Press 10.1017/S0022029917000504

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Oxytocin release, milking characteristics, and teat condition were investigated with reduced claw vacuum and pulsation settings compared to milking at regular settings with or without pre-stimulation. The reduced vacuum and pulsation settings during low milk flow are expected to protect the teat tissue before the occurrence of milk ejection at the start of milking, and at the end of milking during a potential overmilking period, i.e. at a milk flow <200 g/min. Seven cows were machine-milked either after a 60 s manual pre-stimulation, or without pre-stimulation and reduced vacuum and pulsation settings, or at full vacuum and normal pulsation during the start of milking. Plasma oxytocin (OT) concentration increased similarly in response to manual pre-stimulation and to both milking with reduced, or with full vacuum and pulsation settings, however delayed by 1 min if the cluster was attached without pre-stimulation. In all treatments OT concentrations remained elevated throughout milking. Milk flow curves were mostly non-bimodal at milkings after manual pre-stimulation and bimodal at milkings without pre-stimulation. The main milking time was shorter and average milk flow was higher during milking after pre-stimulation, but did not differ between treatments without pre-stimulation. Milk yields and peak flow rates were not affected by treatments. Either reduced or full vacuum settings were again applied during an intended overmilking from 200 to 100 g/min of milk flow towards the end of milk harvest. Pre-milking teat ultrasound cross sections were recorded one day before the experiment started. Post-milking ultrasound cross sections were performed at 15 min after each experimental milking. Teat wall thickness was increased after milking as compared to pre-milking but did not differ among treatments. In conclusion, OT release and milking performance are similar if milking is performed with pre-stimulation, or without pre-stimulation but reduced claw vacuum and b-phase during low milk flow.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Physiology
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH)

Graduate School:

Graduate School for Cellular and Biomedical Sciences (GCB)

UniBE Contributor:

Neuheuser, Anna-Lena; Schwinn, Ann-Catherine Silvia; Wellnitz, Olga; Hernandez Castellano, Lorenzo Enrique and Bruckmaier, Rupert

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 590 Animals (Zoology)
600 Technology > 630 Agriculture

ISSN:

0022-0299

Publisher:

Cambridge University Press

Language:

English

Submitter:

Josef Johann Gross

Date Deposited:

19 Apr 2018 13:02

Last Modified:

23 Oct 2019 21:03

Publisher DOI:

10.1017/S0022029917000504

PubMed ID:

28929993

Uncontrolled Keywords:

Milking dairy cows oxytocin pulsation vacuum

BORIS DOI:

10.7892/boris.113638

URI:

https://boris.unibe.ch/id/eprint/113638

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