Reinemeyer C R, Smith S A, Gabel A A, Herd R P
Equine Vet J. 1986 Mar;18(2):121-4. doi: 10.1111/j.2042-3306.1986.tb03564.x.
Monthly variations in the magnitude of adult and larval cyathostome burdens were observed in 55 horses necropsied over a 15-month period in the northern USA. Peak numbers of adult cyathostomes occurred in late winter (March) and late summer (September). Larval cyathostomes demonstrated peak numbers from February to April and again in October, beginning one month earlier than the spring adult peak and one month after the autumn adult peak, respectively. The reproductive status of individual female Cyathostomum catinatum, Cyath coronatum, Cylicocyclus nassatus, Cylicostephanus goldi and Cylicostephanus longibursatus was classified as immature, gravid or spent. Seasonal changes in these classifications were monitored as a marker for the age structure of these populations. Each reproductive category of female small strongyle was dominant during only one period per year and these periods were similarly distributed for all five species examined. Immature cyathostomes were most common from late winter to spring (March to May); gravid worms were predominant beginning in spring (April/May) and continuing into autumn (October to December). Spent females prevailed from autumn through winter (October to March/April).
在美国北部，对15个月内剖检的55匹马进行观察，发现成年和幼虫阶段杯环线虫负荷量存在月度变化。成年杯环线虫数量高峰出现在冬末（3月）和夏末（9月）。幼虫阶段杯环线虫数量高峰出现在2月至4月，10月再次出现，分别比春季成年杯环线虫高峰早1个月，比秋季成年杯环线虫高峰晚1个月。将单个雌性猫杯环线虫、冠状杯环线虫、鼻状杯环线虫、戈氏杯环线虫和长囊杯环线虫的生殖状态分为未成熟、妊娠或耗尽。监测这些分类的季节性变化，作为这些种群年龄结构的一个指标。每年每个时期，雌性小型圆线虫的每个生殖类别仅占主导地位，且对于所有五个研究物种，这些时期的分布相似。未成熟的杯环线虫在冬末至春季（3月至5月）最为常见；妊娠虫体从春季（4月/5月）开始占主导，并持续到秋季（10月至12月）。耗尽的雌性虫体在秋季至冬季（10月至3月/4月）占优势。
