| seasonal changes in the genetic structure of an aphid-ant mutualism as revealed using microsatellite analysis of the aphid tuberculatus quercicola and the ant formica yessensis. | the present study examined whether the mutualistic relationship between the aphid tuberculatus quercicola (matsumura) (homoptera: aphididae) and the attending ant formica yessensis forel (hymenoptera: formicidae) has had any mutual effects on the microgeographical genetic population structure of both partner species. the aphids and the attending ants were collected in june, august, and october 2004 from six trees of the daimyo oak quercus dentata thunberg (fagales: fagaceae) and were genotyped u ... | 2009 | 19619024 |
| contrasting patterns of genetic structure and dispersal ability in ant-attended and non-attended tuberculatus aphids. | aphid species within the genus tuberculatus exhibit a variety of interactions with ants, ranging from close associations to non-attendance. an ant-attended species, tuberculatus quercicola, and two non-attended species, tuberculatus japonicus and tuberculatus paiki, are sympatric and hosted by the tree species quercus dentata (fagaceae). an undescribed ant-attended species of tuberculatus (sp. a) and several non-attended tuberculatus species are found on quercus crispula trees. the population ge ... | 2010 | 19923136 |
| unique haplotypes in ant-attended aphids and widespread haplotypes in non-attended aphids. | aphid species within the genus tuberculatus mordvilko (hemiptera: aphididae) exhibit a variety of interactions with ants, ranging from close associations to non-attendance. a previous study indicated that despite wing possession, ant-attended tuberculatus species exhibited low dispersal rates compared with non-attended species. this study examined if presence or absence of mutualistic interactions and habitat continuity of host plants affected intraspecific genetic diversity and genetic differen ... | 2012 | 23139889 |
| ant attendance reduces flight muscle and wing size in the aphid tuberculatus quercicola. | in otherwise mutualistic relationships between aphids and ants, attendance by ants often has negative impacts on aphids. for example, in a previous study using traps in the field, the aphid tuberculatus quercicola, which exhibits mutualistic interactions with ants, showed extremely low dispersal rates, despite having long wings. this study investigates whether components of the flight apparatus (mesonotum length, flight muscle and wings) differ between aphids attended by ants and not attended by ... | 2012 | 22378740 |
| ant attendance changes the sugar composition of the honeydew of the drepanosiphid aphid tuberculatus quercicola. | mutualistic interactions between aphids and ants are mediated by the honeydew produced by aphids. previous work showed that when attended by the ant formica yessensis, nymphs of the aphid tuberculatus quercicola developed into significantly smaller adults with lower fecundity than when not ant-attended. this study tested the hypothesis that this cost of ant attendance arises through changes in the quality and quantity of honeydew. ant-attended and ant-excluded aphid colonies were prepared in the ... | 2001 | 28547087 |