Shaw J L, Moss R
Department of Zoology, University of Aberdeen.
Res Vet Sci. 1990 Jan;48(1):59-63.
Captive hen red grouse infected with Trichostrongylus tenuis larvae started to lay later in spring and laid fewer eggs at a slower rate than uninfected hens. March-infected hen grouse showed greater effects than December-infected ones, probably because developing larvae were more pathogenic than adult worms. The mechanism by which parasites interfered with egg production involved reduction in food intake. Infected hens also gained less weight than controls before laying.
感染了细颈毛圆线虫幼虫的圈养红松鸡母鸡在春季开始产蛋的时间较晚，且产蛋数量比未感染的母鸡少，产蛋速度也较慢。3月感染的母鸡松鸡比12月感染的母鸡表现出更大的影响，这可能是因为发育中的幼虫比成虫更具致病性。寄生虫干扰产蛋的机制包括食物摄入量减少。感染的母鸡在产蛋前体重增加也比对照组少。
