Felska-Błaszczyk Lidia, Lasota Bogdan, Sulik Małgorzata, Masłowska Anna, Dziadosz Małgorzata, Błaszczyk Barbara, Błaszczyk Piotr
Laboratory of Fur Animals, West Pomeranian University of Technology, Szczecin, Poland.
J Reprod Dev. 2011 Jun;57(3):416-20. doi: 10.1262/jrd.10-077t. Epub 2011 Mar 8.
The aim of this study was to determine whether blood plasma progesterone is a reliable indicator of pregnancy in mink at an early stage of gestation. We also attempted to establish the threshold value of progesterone as a pregnancy indicator. The analysis was carried out at a production farm on 42 standard female mink aged 1 year, which were grouped both according to the observed success of mating ("mated" and "unmated") and the level of blood serum progesterone measured afterwards ("pregnant" and "nonpregnant"). It was next verified whether a particular female had been assigned to the proper group in the first place. An analysis of accuracy of mating success assessment within the group of unmated females revealed that more than one-third of decisions were wrong, since some females that had been considered unmated ultimately whelped. This suggests that mating supervision by farm workers lacks reliability. A progesterone test for verification of such management decisions should limit the risk of err,or. We suggest that progesterone tests could be carried out using the threshold values 1.9 ng/ml and 20 ng/ml in blood sampled on 25 March and 8 April, respectively, although some level of uncertainty should be taken into account.
本研究的目的是确定血浆孕酮是否是水貂妊娠早期的可靠指标。我们还试图确定作为妊娠指标的孕酮阈值。在一个生产农场对42只1岁的标准雌性水貂进行了分析，这些水貂根据观察到的交配成功率（“已交配”和“未交配”）以及之后测量的血清孕酮水平（“怀孕”和“未怀孕”）进行分组。接下来验证了特定雌性最初是否被正确分组。对未交配雌性组内交配成功评估准确性的分析表明，超过三分之一的判断是错误的，因为一些被认为未交配的雌性最终产仔了。这表明农场工人的交配监督缺乏可靠性。用于验证此类管理决策的孕酮检测应限制错误风险。我们建议，尽管应考虑到一定程度的不确定性，但分别在3月25日和4月8日采集的血液中，孕酮检测可分别使用1.9 ng/ml和2 ng/ml的阈值。
