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Abstract

Genetic evaluation of female fertility in Danish, Finnish, and Swedish dairy cows was updated in 2015 to multiple-trait animal model evaluation, where heifer and cow fertility up to third parity are considered as separate traits. A model for conception rate was also developed, which required...

Author(s)
Muuttoranta, K.; Tyrisevä, A. M.; Mäntysaari, E. A.; Pösö, J.; Aamand, G. P.; Lidauer, M. H.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 9, pp 8184-8196
Abstract

High-producing dairy cows experience a state of negative energy balance in the periparturient period that is partially addressed by increasing the rate of fat and protein mobilization. Previous studies have focused on the rate of fat mobilization, and consequently the rate of protein mobilization...

Author(s)
Megahed, A. A.; Hiew, M. W. H.; Ragland, D.; Constable, P. D.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 6, pp 5550-5565
Abstract

The aim of this study was to estimate genetic parameters for environmental sensitivities in milk yield and composition of Iranian Holstein cows using the double hierarchical generalized linear model (DHGLM) method. Data set included test-day productive records of cows which were provided by the...

Author(s)
Ehsaninia, J.; Hossein-Zadeh, N. G.; Shadparvar, A. A.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Journal of Dairy Research, 2019, 86, 2, pp 145-153
Abstract

Lameness in dairy cattle is a common welfare problem with significant economic implications. All too often, appropriate treatment is delayed or neglected due to insufficient detection of lame cows. Brush usage is considered a low-resilience activity; that is, one that typically decreases when...

Author(s)
Mandel, R.; Harazy, H.; Gygax, L.; Nicol, C. J.; Ben-David, A.; Whay, H. R.; Klement, E.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 2, pp 1511-1517
Abstract

Bovine leukemia virus (BLV) is widely prevalent in Japanese dairy farms. To control BLV infections in Japan, segregating or managing cows according to their proviral load (PVL) is a rational strategy. This study was conducted to establish a quantitative procedure for estimating blood PVL per...

Author(s)
Nakada, S.; Kohara, J.; Makita, K.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 12, pp 11229-11236
Abstract

We assessed dairy cows' body postures while they were performing different stationary activities in a loose housing system and then used the variation within and between individuals to identify potential connections between specific postures and the valence and arousal dimensions of emotion. We...

Author(s)
Oliveira, D. de; Keeling, L. J.
Publisher
Public Library of Sciences (PLoS), San Francisco, USA
Citation
PLoS ONE, 2018, 13, 5, pp e0195674
Abstract

The objective of the present study was to quantify the relationship between udder skin surface temperature (USST) and somatic cell count (SCC) in lactating dairy cows. Data were recorded on the same 14 Holstein-Friesian cows, at evening (15:00 to 16:00) milking every day over a 2-mo period. Surface ...

Author(s)
Byrne, D. T.; Berry, D. P.; Esmonde, H.; McHugh, N.
Publisher
Oxford University Press, Cary, USA
Citation
Journal of Animal Science, 2018, 96, 10, pp 4458-4470
Abstract

At dairy cow shows, the appearance of the udder is very important. To show cows at their best, udders are often presented in an overbagged state by extending milking intervals before the show. This practice represents an animal welfare issue because it is associated with behavior changes (e.g.,...

Author(s)
Balmer, M.; Alsaaod, M.; Boesiger, M.; Studer, E.; O'Brien, R.; Schuepbach-Regula, G.; Steiner, A.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 1, pp 660-665
Abstract

The aim of this study was the evaluation of the efficiency of dairy cow farms in Greece using the nonparametric method of Data Envelopment Analysis (DEA). To achieve the aim of this empirical analysis, two basic models were developed: one using the hypothesis of Constant Return to Scale (CRS) and...

Author(s)
Siafakas, S.; Tsiplakou, E.; Kotsarinis, M.; Tsiboukas, K.; Zervas, G.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Livestock Science, 2019, 222, pp 14-20
Abstract

Various models and datasets related to aflatoxins in the maize and dairy production chain have been developed and used but they have not yet been linked with each other. This study aimed to investigate the impacts of climate change on aflatoxin B1 production in maize and its consequences on...

Author(s)
Fels-Klerx, H. J. van der; Vermeulen, L. C.; Gavai, A. K.; Liu, C.
Publisher
Public Library of Sciences (PLoS), San Francisco, USA
Citation
PLoS ONE, 2019, 14, 6, pp e0218956

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