淮河水系耳萝卜螺生态的初步研究

目的：探讨耳萝卜螺的生态习性及季节分布，以利研究淮河水系毛毕属吸虫。方法：应用手抄网、手抄勺等在其生境内作定时、定性、定量采集。结果：基本探明了淮河水系耳萝卜螺的生境、食性、繁殖、季节消长、孳生密度、迁移和敌害等。结论：耳萝卜螺在淮河水系分布广泛，活动时间较长，是毛毕属吸虫在该水系流行的主要中间宿主。

Preliminary study on the ecology of radix auricularialiving in the Huaihe riverside

AIM: To study ecologic habits and seasonal distribution of radix auricularia,so as to make preparations for study of Trichobiharzia living in the Huaihe ri,' system.METHODS= Collecting radix auricularia by adopting the method of fixed spot,. stative,quantity, regular investigation from its natural environments (Huaihe riverside) wish handoperation-net and hand-ope rating-spoon. RESUL TS: The ha bit s, ea ting pa items, reprthduction, seasonal distribution, breed density, migration and natural enemy of radix auricularia have probaly verified in the Huaihe riverside. CONCLUSION: radix auricularia is widely dispersed over Huaihe riverside, it is main intermediate host of Trichobiharzia in the Huaihe river systerm.