Aphid galls accumulate high concentrations of amino acids: a support for the nutrition hypothesis for gall formation
- Yoshitaka Koyama, I. Yao, S. Akimoto
- Biology, Environmental Science
- 1 October 2004
It is suggested that S. chaetosiphon galls function to promote the breakdown of leaf protein, leading to an increased performance of gall‐inhabiting aphids.
Costs and benefits of ant attendance to the drepanosiphid aphid Tuberculatus quercicola
- I. Yao, H. Shibao, S. Akimoto
- Biology
- 1 April 2000
It is hypothesized that ant-attended aphids are under intense selective pressures that act against aphid clones which fail to attract many ants, so that aphids have developed an adaptive mechanism to allocate a larger fraction of resources to the honeydew when they are requested to do so by the ants in order to ensure the ants' consistent visitation.
Ant attendance changes the sugar composition of the honeydew of the drepanosiphid aphid Tuberculatus quercicola
- I. Yao, S. Akimoto
- BiologyOecologia
- 1 June 2001
It is suggested that the increase in the proportions of sucrose and trehalose in honeydew leads to a shortage of carbohydrates available for energy metabolism, resulting in lower performance of the aphids under ant attendance.
Flexibility in the composition and concentration of amino acids in honeydew of the drepanosiphid aphid Tuberculatus quercicola
- I. Yao, S. Akimoto
- Biology
- 1 December 2002
Mutualistic interactions between aphids and ants are mediated by honeydew that aphids produce, and nymphs of the aphid Tuberculatus quercicola developed into significantly smaller adults with lower fecundity than did nymphS that were not ant attended.
Introducing wood ants: evolution, phylogeny, identification and distribution
- J. Stockan, E. Robinson, J. Trager, I. Yao, B. Seifert
- Environmental Science, Biology
- 1 July 2016
This chapter describes species that are currently considered members of the subgenus Formica sensu stricto ; their evolution, identification, habitat and distribution, and the concept of red wood ants as social insects is introduced.
The evolution of Zoraptera
- Y. Matsumura, R. Beutel, K. Yoshizawa
- Biology
- 1 April 2020
The divergence age estimation and ancestral distribution area reconstruction suggest an ancient origin and early radiation initiated in the Permian, and plate tectonics theory suggests that the present distribution of Zoraptera was mainly established by vicariance, rather than dispersal.
Mitochondrial phylogenomics and genome rearrangements in the barklice (Insecta: Psocodea).
- K. Yoshizawa, K. Johnson, A. Sweet, I. Yao, R. Ferreira, S. Cameron
- BiologyMolecular Phylogenetics and Evolution
- 1 February 2018
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
- I. Yao, S. Akimoto
- BiologyJournal of Insect Science
- 27 March 2009
In spite of a drastic seasonal change in the genetic difference in F. yessensis, principle coordinate analysis showed that the relative position among the six populations was maintained from spring to summer, suggesting that the tree where honeydew was available for a long time was occupied by F. Yessensis over the same period and that the honeydews were inherited at the level of the ant colony.
Contrasting patterns of genetic structure and dispersal ability in ant-attended and non-attended Tuberculatus aphids
- I. Yao
- Environmental Science, BiologyBiology Letters
- 23 April 2010
It is suggested that populations of ant-attended aphids are composed of fragmented local subpopulations that are connected by low dispersal rates, leading to considerable population differentiation.
Costs and constraints in aphid-ant mutualism
- I. Yao
- BiologyEcological research
- 26 April 2014
The honeydew of ant-attended aphids contains melezitose (a trisaccharide), which has an important role in aphid-ant interactions, and cuticular hydrocarbons on aphids and ants have clarified the underlying mechanisms of ant predation on aphid populations.
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