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Abstract

This article describes the negative effects of selection for high milk yield on the reproductive performance of dairy cows.

Author(s)
Kleen, J. L.
Publisher
DLG AgroFood medien gmbh, Bonn, Germany
Citation
Milchpraxis, 2017, 55, 3, pp 35-37
Abstract

Activity was automatically measured in 2 h intervals with the neck mounted activity meter system Qwes HR (SCR, Israel) in 6 herds with Holstein Friesian cows and reference values for diurnal rhythm in the period 240 hr until 49 hr before artificial insemination (AI) were calculated for each cow....

Author(s)
Schröter, I.; Brandt, H. R.; Hoy, St.
Publisher
Eugen Ulmer KG, Stuttgart, Germany
Citation
Züchtungskunde, 2016, 88, 2, pp 134-147
Abstract

Protocols for synchronization of ovulation are widely adopted by the dairy industry to improve reproductive efficiency. It was the objective of this article to summarize three studies recently published that present valuable information for dairy practitioners. In the first study from Bisinotto et...

Author(s)
Borchardt, S.; Heuwieser, W.
Publisher
Terra-Verlag GmbH, Konstanz, Germany
Citation
Tierärztliche Umschau, 2015, 70, 11, pp 447-450
Abstract

The aim of this study was to evaluate plasma levels of LH (luteinizing hormone), heat symptoms and the quality of the corpora lutea after different synchronisation protocols in Brown-Swiss dairy cows under the objective of a fixed artificial insemination date (IATF). The study was performed within...

Author(s)
Moyano, J. C.; López, J. C.; Vargas, J.; Quinteros, O. R.; Marini, P. R.
Publisher
Eugen Ulmer KG, Stuttgart, Germany
Citation
Züchtungskunde, 2015, 87, 4, pp 265-271
Abstract

The aetiology, symptoms, differential diagnosis, and prevention of premature death (embryo mortality)in cows are discussed.

Author(s)
Berger, J.
Publisher
DLG AgroFood medien gmbh, Bonn, Germany
Citation
Milchpraxis, 2014, 52, 2, pp 18-20
Abstract

A review on the correlation between reproductive performance as well as reproductive disorders (such as infertility) and milk yield and production in dairy cows was presented.

Author(s)
Bollwein, H.
Publisher
Besamungsverein Neustadt a.d. Aisch e.V., Neustadt a.d. Aisch, Germany
Citation
Zuchtwahl und Besamung, 2014, No.172, pp 45-47
Abstract

Author(s)
Kleen, J.
Publisher
DLG AgroFood medien gmbh, Bonn, Germany
Citation
Milchpraxis, 2013, 51, 4, pp 40-42
Abstract

During artificial insemination (AI) of sows the stimulation - most effective in presence of a boar - plays an important role. Aim of the present study was to determine whether the simultaneous presence of two boars during AI could lead to an improved stimulation of the sows and, in consequence,...

Author(s)
Zimmer, C.; Hoy, S.
Publisher
Schlütersche Verlagsgesellschaft GmbH & Co. KG, Hannover, Germany
Citation
Praktische Tierarzt, 2013, 94, 11, pp 1008-1015
Abstract

The objective of the study was to investigate whether automatically measured rumination can be used to detect estrus in dairy cattle. In five farms, the cows were equipped with a microphone-based respactor system to continuously record (in blocks of 2 hours) ruminating activity. The analysed...

Author(s)
Reith, S.; Fengels, I.; St. Hoy
Publisher
Eugen Ulmer KG, Stuttgart, Germany
Citation
Züchtungskunde, 2012, 84, 4, pp 281-292
Abstract

Improvement of reproductive performance in pigs through careful monitoring of artificial insemination in sows is discussed in this article. Focus is given on determining the optimum time for insemination, factors included in insemination monitoring, application of insemination monitoring and...

Author(s)
Hoy, S.
Publisher
Besamungsverein Neustadt a.d. Aisch e.V., Neustadt a.d. Aisch, Germany
Citation
Zuchtwahl und Besamung, 2012, No.168, pp 60-62

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