POPULATION-STRUCTURE AND THE EVOLUTION OF VIRULENCE IN NEMATODE PARASITES OF FIG WASPS
POPULATION-STRUCTURE AND THE EVOLUTION OF VIRULENCE IN NEMATODE PARASITES OF FIG WASPS
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DOI：
10.1126/science.259.5100.1442
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发表时间：
1993-03-05
期刊：
影响因子：
56.9
通讯作者：
HERRE, EA
中科院分区：
文献类型：
--
作者：
HERRE, EA
人们通常认为，随着时间的推移，寄生生物和致病生物往往会与宿主发展出良性关系。相反，理论上的论点表明，寄生虫传播机会的增加将促进毒力的进化。寄生于无花果传粉黄蜂的物种特异性线虫的自然历史允许在自然种群中测试这些预测。对于11种巴拿马榕小蜂，这些物种的特点是人口结构，导致寄生虫传播的机会增加港口更致命的线虫物种。此外，种群结构的差异也与其他种内和种间现象的差异有关，包括榕小蜂物种之间的性别比例，黄蜂-榕互惠关系的紧张程度，以及寄生蜂雄性之间的致命战斗。
It is often assumed that parasitic and disease-producing organisms tend to evolve benign relationships with their hosts over time. In contrast, theoretical arguments suggest that increased opportunities for parasite transmission will promote the evolution of increased virulence. The natural history of species-specific nematodes that parasitize fig-pollinating wasps permits the testing of these predictions in natural populations. For 11 species of Panamanian fig wasps, those species characterized by population structures that result in increased opportunities for parasite transmission harbor more virulent species of nematodes. In addition, differences in population structure are also associated with differences in other intra- and interspecific phenomena, including sex ratios among the fig wasp species, the degree of tension in the wasp-fig mutualism, and lethal combat among the males of parasitic wasps.