摘要
During the breeding season of 1991 a total of 608 blue fox vixens aged 1 to 6 years (2.3 ± 0.1 years, mean ± SEM) from 2 farms were artificially inseminated intrauterine once with frozen-thawed silver fox semen (1 ml dose containing a total of 150 million spermatozoa). The vixens were allocated to 3 different groups according to the time of insemination. Vixens in Group 1 (n = 203), Group 2 (n = 198), and Group 3 (n = 207) were inseminated on the first, second or third day after the peak value of vaginal electrical resistance, respectively.
An overall conception rate of 75% (456 of 608) and 6.0 ± 0.1 (mean ± SEM) cubs per litter was obtained. Conception rates and mean litter sizes were significantly different between groups of vixens with respect to day of insemination (P = 0.02, Chisquare, Kruskall-Wallis Test). Vixens inseminated on the second day (Group 2) had the highest conception rate (81%) and the largest mean litter size (7.0 ± 0.2 cubs) of the three groups, while those inseminated on the third day (Group 3) had the lowest conception rate and mean litter size (70%, 5.4 ± 0.3 cubs).
摘要译文
在1991年的繁殖季节，来自2个农场的总共608只年龄为1至6岁的蓝狐狐狸（2.3±0.1岁，平均值±SEM）是用冷冻解冻的银狐精液（1 ml剂量含有总量）进行人工授精的宫内照射1.5亿个精子）。根据授精时间将vixens分配到3个不同的组。第1组（n = 203），第2组（n = 198）和第3组（n = 207）的Vixens分别在阴道电阻峰值后的第一天，第二天或第三天进行授精。获得了每窝75％（608的456）和6.0±0.1（平均值±SEM）幼仔的整体受孕率。相对于授精日，Vixens组的概念率和平均窝产仔数显着不同（P = 0.02，Chisquare，Kruskall-Wallis检验）。第二天（第2组）的Vixens受精率最高（81％），三组最大平均产仔数（7.0±0.2只），而第3天（第3组）受精最低受胎率和平均窝产仔数（70％，5.4±0.3只幼仔）。
W.Farstad[1][a];J.A.Fougner[2];C.G.Torres[3];. The optimum time for single artificial insemination of blue fox vixens (Alopex[J]. Theriogenology, 1992,38(5): 853-865