Arnett E B, Irby L R, Cook J G
Department of Biology, Montana State University, Bozeman 59717.
J Wildl Dis. 1993 Jan;29(1):90-3. doi: 10.7589/0090-3558-29.1.90.
Sex- and age-specific fecal lungworm (Protostrongylus spp.) larvae concentrations in Rocky Mountain bighorn sheep (Ovis canadensis canadensis) from the Cinnabar Winter Range in southwestern Montana were determined. All 228 fecal samples collected from bighorn sheep of known sex and age class from November to April, 1984 to 1987 contained first-stage lungworm larvae. Fecal lungworm concentrations of ewes and rams declined significantly from late fall through early spring, whereas number of lungworms in lamb feces increased as winter progressed.
测定了来自蒙大拿州西南部朱砂冬季牧场的落基山大角羊（加拿大盘羊指名亚种）粪便中按性别和年龄分类的肺线虫（原圆线虫属）幼虫浓度。1984年至1987年11月至4月期间，从已知性别和年龄组的大角羊采集的所有228份粪便样本中均含有第一期肺线虫幼虫。母羊和公羊粪便中的肺线虫浓度从秋末到早春显著下降，而随着冬季的推进，羔羊粪便中的肺线虫数量增加。
