Kostadinova A, Mavrodieva R S
Department of Biodiversity, Central Laboratory of General Ecology, Bulgarian Academy of Sciences, 2 Gagarin Street, 1113 Sofia, Bulgaria.
Parasitology. 2005 Sep;131(Pt 3):337-46. doi: 10.1017/s0031182005007729.
Patterns of parasite site selection, variation in infection parameters and interspecific associations are examined in the light of new field data on larval microphallids in Gammarus insensibilis from a Black Sea lagoon. These patterns are discussed in relation to the predictions for the manipulative effect of Microphallus papillorobustus and its relationships with the other microphallid species based on studies on the French Mediterranean coast. Four species were recovered: Maritrema subdolum, Microphallus hoffmanni, M. papillorobustus and Levinseniella propinqua. The latter two were located in both corporal and cephalic segments, but the selection of brain appeared stronger for L. propinqua. M. subdolum was the first colonizer of amphipod population recruits, and unequivocally the dominant species in the lagoon. There was a significant positive relationship between the parasite load of all 4 species. Concurrent infections were exceedingly frequent, and no departures from random association were detected. We found no evidence that the cerebral metacercariae of M. papillorobustus consistently predict the parasite load of any of the other species in the system and identify sources for heterogeneity that may account for the differences between the Black Sea and the Mediterranean system: habitat heterogeneity, bird diversity and host-parasite systems used to infer relationships between microphallids.
根据来自黑海泻湖的无感知钩虾幼虫微小阴茎吸虫的新野外数据，研究了寄生虫的位点选择模式、感染参数的变化以及种间关联。基于对法国地中海沿岸的研究，讨论了这些模式与乳头微小阴茎吸虫操纵作用的预测及其与其他微小阴茎吸虫物种关系的相关情况。共发现了四个物种：亚潜微睾吸虫、霍夫曼微小阴茎吸虫、乳头微小阴茎吸虫和近邻莱文吸虫。后两种分布于身体和头部节段，但近邻莱文吸虫对脑部的选择似乎更强。亚潜微睾吸虫是新孵化的钩虾种群的首个定殖者，并且无疑是泻湖中的优势物种。这4个物种的寄生虫负荷之间存在显著的正相关关系。同时感染极为常见，未检测到与随机关联的偏差。我们没有发现证据表明乳头微小阴茎吸虫的脑期尾蚴能始终如一地预测系统中任何其他物种的寄生虫负荷，并确定了可能解释黑海和地中海系统之间差异的异质性来源：栖息地异质性、鸟类多样性以及用于推断微小阴茎吸虫之间关系的宿主 - 寄生虫系统。
