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Abstract

Hofmann (1935) submitted a proposal, using a timed mating and farrowing system to program the reproductive dates in a sow herd and thus to direct the breeding and production cycle taut. In 1958 to 1964, the developed system of periodic farrowing was operated in Thuringia first farms successfully...

Author(s)
Hühn, U.; Wähner, M.
Publisher
Eugen Ulmer KG, Stuttgart, Germany
Citation
Züchtungskunde, 2016, 88, 4, pp 268-281
Abstract

Based on profound biologic knowledge, several methods to control and regulate porcine reproduction (induction of puberty, synchronization of oestrus and ovulation, fix-time insemination, induction and synchronization of parturition) have been developed and improved during the last 35 years....

Author(s)
Brüssow, K. P.; Wähner, M.
Publisher
Verlag Eugen Ulmer GmbH, Stuttgart, Germany
Citation
Züchtungskunde, 2005, 77, 2/3, pp 157-170
Abstract

The great demand for semen of high producing boars and the negative influences on sperm production like individuality, season and frequency of use require adjustments for stimulating and stabilizing sperm production. The vitamin-similar active substance L-carnitine with its function in the lipid...

Author(s)
Wähner, M.; Geyer, M.; Hallfarth, G.; Hühn, U.
Publisher
Verlag Eugen Ulmer GmbH, Stuttgart, Germany
Citation
Züchtungskunde, 2004, 76, 3, pp 196-207
Abstract

Since more than three decades hormones have been used for the synchronisation of ovulation in sows often combined with timed artificial insemination. This will be done without considering the oestrous behaviour. A selection with regard to symptoms of standing behaviour is not necessary. Regarding...

Author(s)
Fischer, K.; Wähner, M.
Publisher
Forschungsinstitut für die Biologie landwirtschaftlicher Nutztiere, Dummerstorf, Germany
Citation
Archiv für Tierzucht, 2003, 46, 6, pp 559-568
Abstract

Methods aimed at programmed pig production are summarized with reference to recent practice in Germany, under the headings: oestrus synchronization in gilts; ovulation synchronization with time-orientated insemination; farrowing synchronization.

Author(s)
Wähner, M.
Publisher
Besamungsverein Neustadt a.d. Aisch e.V., Neustadt a.d. Aisch, Germany
Citation
Zuchtwahl und Besamung, 2003, No.150, pp 58-60
Abstract

Of 473 sows housed singly, 86.7% showed standing oestrus vs. 83.4% of group-housed sows. Parity had no significant effect on the percentage of ♀♀ showing standing oestrus in either group, although group-housed sows showed the highest percentage of standing oestrus in their 6th or later parities vs. ...

Author(s)
Wähner, M.; Bauer, M.; Weber, A.
Citation
Tierzucht, 1991, 45, 12, pp 570-572
Abstract

Eighty gilts were slaughtered at various times after puberty induction, using 500 IU of PMS and 250 IU of HCG, and stimulation of ovulation (using 500 IU of HCG 72 hours after puberty had been induced). Most gilts ovulated between 96 and 120 hours after puberty induction. Only 3.2% of the follicles ...

Author(s)
Schlegel, W.; Wahner, M.; Stenzel, S.; Krebs, R.
Citation
Archiv fur Experimentelle Veterinarmedizin, 1978, 32, 6, pp 873-877
Abstract

In 86 gilts in which puberty had been induced by administration of 500 IU of PMS and 250 IU of HCG, only 26.9% of the group without HCG had completed ovulation 120 hours from puberty induction, but 93.5% had done so in the group which had received an additional 500 IU of HCG 78 hours after the...

Author(s)
Schlegel, W.; Stenzel, S.; Krebs, R.; Wahner, M.
Citation
Archiv fur Experimentelle Veterinarmedizin, 1978, 32, 6, pp 863-867
Abstract

Gilts were each fed 5 g Suisynchron premix daily for 20 days and were then given 1000 IU PMS, plus 0, 100, 200 or 300 IU HCG 24 h after the end of treatment. All groups received 500 IU HCG 72 h after the 1st HCG injection, and were inseminated 24 and 42 h later. Five wk later, the gilts were...

Author(s)
Schlegel, W.; Wahner, M.; Stenzel, S.
Citation
Monatshefte fur Veterinarmedizin, 1978, 33, 17, pp 663-664