Taraschewski H, Paperna I
Z Parasitenkd. 1982;67(2):165-73. doi: 10.1007/BF00928112.
Over a period of 11 months, eight samples of Pirenella conica were taken at each of three sites of a mangrove lagoon in Sinai. Infection with larval trematodes, especially of Heterophyidae, was highest at the site within the mangrove thicket with a breeding colony of reef herons, the supposed definitive hosts of the Heterophyidae. The lowest frequency of infection was recorded from a tide-pool on the broad sand-flats surrounding the lagoon, where there was a great variation in the abundance of snails and xiphidiocercariae were more common than heterophyid cercariae. Predation from fish or other molluscs did not appear to be an important factor at either of these two sites. In all three sites, double infections of Heterophyidae and trematodes with xiphidiocercariae as well as of Heterophyidae and Echinostomatidae occurred less frequently than theoretically expected, but there was no competitive exclusion between Echinostomatidae and xiphidiocercariae.
在11个月的时间里，在西奈半岛一个红树林泻湖的三个地点，每个地点采集了8个锥形蟹守螺样本。感染幼虫吸虫，尤其是异形科吸虫的情况，在有礁鹭繁殖群体的红树林灌木丛中的地点最为严重，礁鹭被认为是异形科吸虫的终末宿主。感染频率最低的记录来自泻湖周围宽阔沙滩上的一个潮池，那里蜗牛的数量变化很大，剑尾蚴比异形尾蚴更常见。在这两个地点，鱼类或其他软体动物的捕食似乎都不是一个重要因素。在所有三个地点，异形科吸虫与剑尾蚴吸虫的双重感染以及异形科吸虫与棘口科吸虫的双重感染发生频率低于理论预期，但棘口科吸虫与剑尾蚴之间没有竞争排斥现象。
