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Results of calving records 1980/81



Results of calving records 1980/81



Mitteilungen des Schweizerischen Verbandes fur kunstliche Besamung und der Schweizerischen Arbeitsgemeinschaft fur kunstliche Besamung 20(1): 9-13



During the 1980/81 calving season, 173 bulls were tested for transmission of dystocia and other reproductive traits. 70 of these bulls were Swiss Browns (including 6 American Brown Swiss), 83 were Simmentals (including 6 Red-and-White Holsteins) and 20 were Black Spotteds For the 3 breed types resp., the number of births recorded was 34 107, 38 697 and 7402, the percentage of primiparous calvings 34.2, 28.7 and 31.6, the incidence of twinning (not counting 1st calvers) 4.3, 5.8 and 4.9%, percentage of stillbirths 2.8, 3.4 and 3.6, the occurrence of dystocia 2.5, 3.9 and 3.2%, pregnancy duration 288.4, 286.3 and 282.7 days, and calf birth weight 43.4, 43.7 and 43.0 kg. The semen of 1 Fribourg bull was destroyed as 19.8% of his daughters had stillbirths and 17.9% dystocia. (For the previous report see ABA 52, 222).

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Accession: 001246593

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