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Abstract

During the 2010/2011 calving season a remarkably large number of calves were born with umbilical hernia on a dairy farm in Schleswig-Holstein. All calves were descendants of the US Red Holstein bull "Avanti Red" used in artificial insemination. The objective of the present study was to compare the...

Author(s)
Vortmann, T. F.; Lupp, B.; Distl, O.
Publisher
Schlütersche Verlagsgesellschaft GmbH & Co. KG, Hannover, Germany
Citation
Berliner und Münchener Tierärztliche Wochenschrift, 2017, 130, 7/8, pp 364-368
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

The spermatology reference laboratories located at the TiHo Hannover and IFN Schonow have been developing science-based quality control programs for boar studs for many years. In ongoing research projects funded by the FBF e. V. (Forderverein Biookonomieforschung), influencing factors on sperm...

Author(s)
Schulze, M.; Schäfer, J.; Jung, M.; Waberski, D.
Publisher
Eugen Ulmer KG, Stuttgart, Germany
Citation
Züchtungskunde, 2017, 89, 1, pp 22-28
Abstract

The aim of this study was the determination of genetical and environmental factors that affect the occurrence of aberrant spermatozoa. The evaluation comprised 1,543 ejaculates collected from 57 boars representing BHZP 77 (Piétrain line db.77 ®), German Large White, German Landrace and Piétrain....

Author(s)
Jansen, S.; Sharifi, A. R.; Knorr, C.; Wiedemann, I.
Publisher
Eugen Ulmer KG, Stuttgart, Germany
Citation
Züchtungskunde, 2017, 89, 4, pp 300-310
Abstract

To investigate the influence of the age of bulls at semen production on the non-return rate 56 days after first insemination 39 AI-bulls were investigated. Because of the small sample size for the individual ejaculates the non-return rate included data from first to third breeding services. These...

Author(s)
Melbaum, J.; Schwerhoff, M.; Gehrmeyer, D.; Melbaum, H.; Wassmuth, R.
Publisher
Eugen Ulmer KG, Stuttgart, Germany
Citation
Züchtungskunde, 2016, 88, 5, pp 371-378
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

A female calf of the breed German Holstein (GH) was spontaneously born on July 28, 2013 which was 35 days before the expected term of birth. The dam was a heifer when she got pregnant from the first insemination on November 23, 2012. Calving was without complications. The calf was fully viable and...

Author(s)
Reinartz, S.; Höltershinken, M.; Distl, O.
Publisher
Schlütersche Verlagsgesellschaft GmbH & Co. KG, Hannover, Germany
Citation
Berliner und Münchener Tierärztliche Wochenschrift, 2016, 129, 1/2, pp 82-87
Abstract

The aim of the present study has been the development of a semen processing method allowing the storage of equine semen at a high concentration of 333 million sperm/ml and low volume. Different seminal plasma concentrations were tested to achieve optimum spermatozoal motility. The quality of the...

Author(s)
Lübke, J. A. K.
Publisher
Mensch & Buch Verlag, Berlin, Germany
Citation
Einfluss von Seminalplasma auf die Motilität von gekühltem Hengstsamen nach einer hochkonzentrierten Lagerung, 2016, pp 111 pp.
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 aim of the present study was to determine if stimulation of the sows, and therefore the success of AI could be enhanced by the presence of two boars during AI. During artificial insemination, one boar (n=199 gilts and sows) or two boars consecutively (n=199 gilts and sows) were positioned in...

Author(s)
Zimmer, C.; Hoy, S.
Publisher
Eugen Ulmer KG, Stuttgart, Germany
Citation
Züchtungskunde, 2013, 85, 5, pp 388-395

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