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Variance components of teat dimensions in dairy cows and associated factors

Ingrid Zwertvaegher UGent, Stephanie Van Weyenberg UGent, Sofie Piepers UGent, Jeroen Baert and Sarne De Vliegher UGent (2012) JOURNAL OF DAIRY SCIENCE. 95(9). p.4978-4988
abstract
Traditionally, all cows within a herd are milked with the same teat cup liner, although it is hypothesized that considerable variation in teat dimensions exists between cows and quarters within cows. To study at which level (herd, cow, or quarter) most variation in teat dimensions resides, and to identify factors explaining (part of) this variation, both a cross-sectional (n = 2,715) and a longitudinal study (n = 8,678) were conducted. Using an objective and easy-to-use measuring device, teat length and teat diameters were determined In both studies, most variation in teat dimensions was present at the cow or within-cow level, and not at the herd level, indicating that choosing a teat cup liner that is identical for all cows in a herd is far from optimal. Quarter position (front versus hind), parity and lactation stage were identified as factors associated with teat length and teat diameters. Generally, front teats were longer and broader than hind teats. Teat length and diameters increased with parity, although the increase in teat length was not significant from second parity onwards in front teats, based on observations from the longitudinal study. After the first 30 d in milk, teat length substantially and significantly increased, whereas teat diameters decreased. We conclude that better results in teat condition, and eventually in udder health, might be yielded when different teat cup liners are chosen for front versus hind teats or for cows of different parity or lactation stage, with special attention to the first 30 d in milk. However, the biological relevance of these differences should be examined first.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
teat dimension, dairy cow, associated factor, variance component, MOUTHPIECE CHAMBER VACUUM, UDDER TRAITS, MACHINE MILKING, LACTATION, MASTITIS, LINER, HEIFERS, CATTLE, ANATOMY
journal title
JOURNAL OF DAIRY SCIENCE
J. Dairy Sci.
volume
95
issue
9
pages
4978 - 4988
Web of Science type
Article
Web of Science id
000307623200026
JCR category
AGRICULTURE, DAIRY & ANIMAL SCIENCE
JCR impact factor
2.566 (2012)
JCR rank
3/54 (2012)
JCR quartile
1 (2012)
ISSN
0022-0302
DOI
10.3168/jds.2011-5296
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2308894
handle
http://hdl.handle.net/1854/LU-2308894
date created
2012-06-17 20:50:04
date last changed
2012-10-23 10:01:16
@article{2308894,
  abstract     = {Traditionally, all cows within a herd are milked with the same teat cup liner, although it is hypothesized that considerable variation in teat dimensions exists between cows and quarters within cows. To study at which level (herd, cow, or quarter) most variation in teat dimensions resides, and to identify factors explaining (part of) this variation, both a cross-sectional (n = 2,715) and a longitudinal study (n = 8,678) were conducted. Using an objective and easy-to-use measuring device, teat length and teat diameters were determined In both studies, most variation in teat dimensions was present at the cow or within-cow level, and not at the herd level, indicating that choosing a teat cup liner that is identical for all cows in a herd is far from optimal. Quarter position (front versus hind), parity and lactation stage were identified as factors associated with teat length and teat diameters. Generally, front teats were longer and broader than hind teats. Teat length and diameters increased with parity, although the increase in teat length was not significant from second parity onwards in front teats, based on observations from the longitudinal study. After the first 30 d in milk, teat length substantially and significantly increased, whereas teat diameters decreased. We conclude that better results in teat condition, and eventually in udder health, might be yielded when different teat cup liners are chosen for front versus hind teats or for cows of different parity or lactation stage, with special attention to the first 30 d in milk. However, the biological relevance of these differences should be examined first.},
  author       = {Zwertvaegher, Ingrid and Van Weyenberg, Stephanie and Piepers, Sofie and Baert, Jeroen and De Vliegher, Sarne},
  issn         = {0022-0302},
  journal      = {JOURNAL OF DAIRY SCIENCE},
  keyword      = {teat dimension,dairy cow,associated factor,variance component,MOUTHPIECE CHAMBER VACUUM,UDDER TRAITS,MACHINE MILKING,LACTATION,MASTITIS,LINER,HEIFERS,CATTLE,ANATOMY},
  language     = {eng},
  number       = {9},
  pages        = {4978--4988},
  title        = {Variance components of teat dimensions in dairy cows and associated factors},
  url          = {http://dx.doi.org/10.3168/jds.2011-5296},
  volume       = {95},
  year         = {2012},
}

Chicago
Zwertvaegher, Ingrid, Stephanie Van Weyenberg, Sofie Piepers, Jeroen Baert, and Sarne De Vliegher. 2012. “Variance Components of Teat Dimensions in Dairy Cows and Associated Factors.” Journal of Dairy Science 95 (9): 4978–4988.
APA
Zwertvaegher, I., Van Weyenberg, S., Piepers, S., Baert, J., & De Vliegher, S. (2012). Variance components of teat dimensions in dairy cows and associated factors. JOURNAL OF DAIRY SCIENCE, 95(9), 4978–4988.
Vancouver
1.
Zwertvaegher I, Van Weyenberg S, Piepers S, Baert J, De Vliegher S. Variance components of teat dimensions in dairy cows and associated factors. JOURNAL OF DAIRY SCIENCE. 2012;95(9):4978–88.
MLA
Zwertvaegher, Ingrid, Stephanie Van Weyenberg, Sofie Piepers, et al. “Variance Components of Teat Dimensions in Dairy Cows and Associated Factors.” JOURNAL OF DAIRY SCIENCE 95.9 (2012): 4978–4988. Print.