D'Allaire S, Leman A D
Can Vet J. 1990 Aug;31(8):581-3.
This investigation was conducted to study boar culling patterns in swine breeding herds. Data were obtained from 84 swine breeding herds and included 440 boars that were culled. Each producer was involved for 12 consecutive months, and recorded every boar that was removed from the herd, the date, and the reason for culling. The annual culling rate for the 84 farms averaged 59.4% +/- 6.4 (SEM). The correlation coefficient between boar and sow culling was 0.52 (p <0.0001). Removal was the result of being overweight (47%), reproductive problems (18%), leg problems (12%), death (7%), and other diseases (4%). From the annual culling rate, the average breeding life of boars was estimated at 20 months. From this study, we concluded that the annual culling rate for boars in commercial herds was high and related to several different factors.
本调查旨在研究种猪场公猪的淘汰模式。数据来自84个种猪场，包括440头被淘汰的公猪。每个生产者连续参与12个月，记录每头从猪群中淘汰的公猪、日期和淘汰原因。84个农场的年淘汰率平均为59.4%±6.4（标准误）。公猪和母猪淘汰之间的相关系数为0.52（p<0.0001）。淘汰原因包括超重（47%）、繁殖问题（18%）、腿部问题（12%）、死亡（7%）和其他疾病（4%）。根据年淘汰率，公猪的平均繁殖寿命估计为20个月。从这项研究中，我们得出结论，商业猪群中公猪的年淘汰率很高，且与几个不同因素有关。
