Ecological Observations on Cerithium moniliferum Kiener (Gastropoda : Cerithiidae) and its Trematode Parasites at Heron Island, Great Barrier Reef
Ecological Observations on Cerithium moniliferum Kiener (Gastropoda : Cerithiidae) and its Trematode Parasites at Heron Island, Great Barrier Reef
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大堡礁苍鹭岛 Cerithium moniliferum Kiener（腹足纲：Cerithiidae）及其吸虫寄生虫的生态观察
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发表时间：
1979
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影响因子：
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通讯作者：
L. Cannon
中科院分区：
文献类型：
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作者：
L. Cannon
本文研究了大堡礁鹭岛热带潮间带腹足类念珠蟹的分布、丰度、生长和繁殖，并与11种双殖吸虫的寄生率进行了比较。螺斑块状分布在暴露的海滩岩石，并表现出很少的季节性变化的丰度，但数量和壳形态与沙运动。蜗牛主要在春季繁殖，此时的体轮唇变厚，主要从夏季到冬季生长，随着它们的生长迁移到更高更暴露的水平。有没有任何或所有吸虫的发病率的季节性模式，其中五个是中等常见的，虽然很少有发病率超过20%的人口。在海滩岩石较高的地方发现的厚嘴唇和被侵蚀的外壳的较大蜗牛中，寄生虫更为常见。据推测，寄生性随着年龄和体型的增长而稳步增加，但一旦感染，蜗牛就会停止生长。被寄生的蜗牛被阉割，大概能活2-3年，到那时感染率超过50%。
The distribution, abundance, growth and reproduction of a population of tropical intertidal gastropods, Cerithium moniliferum, at Heron Island, Great Barrier Reef, were examined and related to the incidence of parasitism by 11 digenean trematodes. The snails were patchily distributed on exposed beachrock, and showed little seasonally related change in abundance, but numbers and shell morphs were correlated with sand movements. Snails bred mainly in spring, had a thickened lip to the body whorl at this time and grew mainly from summer through winter, migrating to higher more exposed levels as they grew. There were no seasonal patterns of incidence with any or all trematodes, five of which were moderately common, though rarely did incidence exceed 20% of the population. Parasitism was more common in larger snails with thick lips and eroded shells found at the higher levels of the beachrock. Parasitism presumably steadily increases with age and size, but once infected, snails stop growing. Parasitized snails are castrated and presumably live for about 2-3 years by which time infection rates exceed 50%.