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Keeping goats and kids together

focus on milk ejection, milk composition, curd yield and animal welfare

Högberg, Madeleine (2016). Keeping goats and kids together. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2016:41
ISBN 978-91-576-8584-1
eISBN 978-91-576-8585-8
[Doctoral thesis]

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Abstract

Milk with high concentrations of fat, total protein and casein is required for cheese production. The Swedish landrace goat produces milk with relatively low dry matter content. The explanation for this may be genetic factors in combination with unfavourable management and milking routines. Goats have a large udder cistern and can therefore be milked without oxytocin (OT) stimulated milk ejection that enables fat rich alveolar milk to be available for milking. Earlier studies have shown that vasopressin (AVP) also can increase fat content in goat milk. The overall aim in this thesis was to investigate if cheese processing properties of Swedish goat milk could be optimized by suckling. Analyses of milk from 28 Swedish goat herds showed that 65% had low concentrations of αS1-casein and only 12 % had high expression (Paper I). In Paper II it was demonstrated that AVP and OT increase simultaneously during suckling but not during hand milking. The importance of AVP was followed up in paper III, and it was demonstrated that AVP administration can cause milk ejection similarly to OT. In paper IV it was found that milking management systems, such as suckling before milking, increased milk fat concentration compared to milking before suckling. When dams and kids were together for a longer time (16h) milk fat, casein concentration and individual curd yield (%) were higher compared to when they were together for shorter time (8h). Thus overall, keeping goats and kids together is beneficial for animal welfare, increases milk fat concentration and curd yield, and can thereby improve
cheese production.

Authors/Creators:Högberg, Madeleine
Title:Keeping goats and kids together
Subtitle:focus on milk ejection, milk composition, curd yield and animal welfare
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :30 April 2016
Depositing date:2 May 2016
Volume:2016:41
Number of Pages:93
Papers/manuscripts:
NumberReferences
IJohansson, M., Högberg, M. & Andrén, A. (2014). High frequencies of the αS1-casein zero variant in milk from Swedish dairy goats. Sheep and Goats Research Journal 29, 1-4.
IIOlsson, K. & Högberg, M. (2009). Plasma vasopressin and oxytocin concentrations increase simultaneously during suckling in goats. Journal of Dairy Research 76, 15-19.
IIIHögberg, M., Olsson, K. & Dahlborn, K. (2014). Can vasopressin induce milk ejection in the lactating goat? Small Ruminant Research 121, 111-115.
IVHögberg, M., Dahlborn, K., Hydbring-Sandberg, E., Hartmann, E. & Andrén, A. (2016). Milk processing quality of suckled/milked goats. Effects of milk accumulation interval and milking regime. Journal of Dairy Research 1-7.
Place of Publication:Uppsala
Publisher:Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8584-1
ISBN for electronic version:978-91-576-8585-8
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L01 Animal husbandry
Q Food science > Q04 Food composition
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 402 Animal and Dairy Science > Animal and Dairy Science.
Agrovoc terms:goats, nannygoats, kids, suckling, lactation, goat milk, proximate composition, casein, lipid content, oxytocin, vasopressin
Keywords:casein, fat, goats, milk ejection, oxytocin, suckling, vasopressin
URN:NBN:urn:nbn:se:slu:epsilon-e-3414
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3414
ID Code:13332
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Anatomy, Physiology and Biochemistry
Deposited By: phd madeleine högberg
Deposited On:02 May 2016 12:18
Metadata Last Modified:02 May 2016 12:18

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