Yasukazu Okada Research Website
研究業績 Publications
52) Adaptive significance of early reproduction in Vespula shidai social wasps
Saga T, Kanai M, Shimada M, Okada Y
Insectes Sociaux (2024) in press
51) No sign of reproductive cessation in the old workers of a queenless ponerine ant
Kishino K, Sakiyama K, Fujioka H, Okada Y.*
Behavioral Ecology and Sociobiology (2024) in press
50) Transcriptomic and functional screening of weapon formation genes implies significance of cell adhesion molecules and female-biased genes in broad-horned flour beetle.
Sugiyama M, Ozawa T, Ohta K, Okada K, Niimi T, Yamaguchi K, Shigenobu S, Okada Y.*
PLoS Genetics (2023) 19.12: e1011069.
49) Anuran juveniles avoid preying on aggressive ant species.
Naganawa, K., & Okada, Y.*
Ethology (2023) 129.11: 592-599.
48) Natural selection increases female fitness by reversing the exaggeration of a male sexually selected trait.
Okada, K., Katsuki, M., Sharma, M.D., Kiyose K, Seko T, Okada Y, Wilson A.J., Hosken D.J.
Nature Communications (2021) 12, 3420. https://doi.org/10.1038/s41467-021-23804-7
47) Social evolution with decoupling of multiple roles of biogenic amines into different phenotypes in Hymenoptera
Sasaki K, Okada Y, Shimoji H, Aonuma H, Miura T, Tsuji K.
Frontiers in Ecology and Evolution (2021) , 9, 287. https://doi.org/10.3389/fevo.2021.659160
46) Individual Ants Do Not Show Activity–rest Rhythms in Nest Conditions.
Fujioka H, Okada Y, Abe MS.
Journal of Biological Rhythms (2021) 36(3), 297-310. https://doi.org/10.1177/07487304211002934
45) Octopaminergic system orchestrates combat and mating behaviors: a potential regulator of alternative male mating tactics in an armed beetle.
Kiyose K, Katsuki M, Suzaki Y, Okada K, Okada Y*
Journal of Insect Physiology (2021) 131, 104211.
44) Sexually selected traits and life history traits of larger and smaller males of the horned flour beetle Gnatocerus cornutus.
Kiyose K. Okada Y, Katsuki M, Suzaki Y, Okada K.
Ecological Entomology (2021) 46(4), 807-815.
DOI: 10.1111/(ISSN)1365-2311
43) Bipartite network analysis of ant-task associations reveals task groups and absence of colonial daily activity.
Fujioka H, Okada Y, Abe MS.
Royal Society Open Science (2021) 8: 201637.
https://doi.org/10.1098/rsos.201637
42) Polyandry and paternity affect disease resistance in eusocial wasps.
SagaT*, Okuno M, Loope K.J., Tsuchida K, Ohbayashi K, Shimada M, Okada Y.
Behavioral Ecology (2020) 31-5, Pages 1172–1179 https://doi.org/10.1093/beheco/araa062
41) Older males are more competitive in male fights and more aggressive towards females in the broad-horned flour beetle Gnatocerus cornutus
Okada K, Katsuki M, Kiyose K, Okada Y
Behavioral Ecology & Sociobiology (2020) 74:36 https://doi.org/10.1007/s00265-020-2815-4
40) A specific type of insulin-like peptide regulates the conditional growth of a beetle weapon
Okada Y*, Katsuki M, Okamoto N, Fujioka H, Okada K.
PLOS Biology (2019) 17(11): e3000541.
首都大プレスリリース （資料はお問い合わせください okayasukazu@gmail.com)
Commentary
RE: Evolution of eusociality via a single gene (ilp2)?
Schultner E, Helanterä H, Okada Y, Oettler J.
Science, eLetters (14 Apr 2019)
https://science.sciencemag.org/content/361/6400/398/tab-e-letters
39) Liquid exchange via stomodeal trophallaxis in the ponerine ants Diacamma sp. from Japan
Fujioka H, Okada Y.
Journal of Ethology (2019) 1-5.
38) Loser-effect duration evolves independently of fighting ability
Okada K, Okada Y, Dall S, Hosken D.
Proceedings of the Royal Society B (2019) 286: 20190582
37) Observation of plugging behaviour reveals entrance-guarding schedule of morphologically specialised caste in Colobopsis nipponicus
Fujioka H, Abe MS, Okada Y.
Ethology (2019) 125: 526-534, DOI: 10.1111/eth.12877
36) Ant activity-rest rhythms vary with age and interaction frequencies of workers.
Fujioka H, Abe MS, Okada Y*.
Behavioral Ecology and Sociobiology (2019) 73.3: 30. https://doi.org/10.1007/s00265-019-2641-8
35) Rapid development and characterization of EST-SSR markers for the honey locust seed beetle, Megabruchidius dorsalis (Coleoptera: Bruchidae), using de novo transcriptome analysis based on next-generation sequencing
Ohbayashi K, Ishikawa N, Hodoki Y, Okada Y, Nakano S, Ito M, Shimada M.
Applied Entomology and Zoology (2019) 54(1), 141-145. https://doi.org/10.1007/s13355-019-00605-5
34)Ant circadian activity associated with brood care type
Fujioka H, Abe MS, Fuchikawa T, Tsuji K, Shimada M, Okada Y*.
Biology Letters (2017) 13: 20160743.
日本経済新聞、読売新聞online、共同通信、Yahoo!ニュース などで紹介
33)Queen contact and among-worker interactions dually suppress worker brain dopamine as a potential regulator of reproduction in an ant.
Shimoji H*, Aonuma H, Miura T, Tsuji K, Sasaki K, Okada Y*.
Behavioral Ecology and Sociobiology (2017) 71: 35.
32) Social dominance alters nutrition-related gene expression immediately: transcriptomic evidence from a monomorphic queenless ant.
Okada Y*, Watanabe Y, Mandy MYT, Tsuji K, Mikheyev AS*.
Molecular Ecology (2017) 26: 2922-2938.
highlighted in Perspective by Amy L Toth
31) Histone deacetylases control module-specific phenotypic plasticity in beetle weapons.
Ozawa T, Mizuhara T, Arata M, Shimada M, Niimi T, Okada K, Okada Y*, Ohta K*.
Proceedings of the National Academy of Sciences (2016) 113: 15042-15047.
朝日新聞にて紹介 解説 Editor's Choice in Science
30) Mutual intra- and interspecific social parasitism between parapatric sister species of Vespula wasps.
Saga T, Kanai M, Shimada M, Okada Y.
Insectes Sociaux (2017) 64(1): 95-101
29) Social dominance and reproductive differentiation mediated by the
dopaminergic signaling in a queenless ant.
Okada Y*, Sasaki K, Miyazaki S, Shimoji H, Tsuji K, Miura T.
Journal of Experimental Biology (2015) 218, 1091-1098
財経新聞 にて紹介
28) Environmental factors that affect pupation decision in the horned flour beetle Gnatocerus cornutus.
Ozawa T, Ohta K, Shimada M, Okada K, Okada Y*
Zoological Science (2015) 32(2), 183-187
27) Social dominance modifies behavioral rhythm in a queenless ant.
Fuchikawa T#, Okada Y#*, Miyatake T, Tsuji K (#equal contribution)
Behavioral Ecology and Sociobiology (2014) 68(11), 1843-1850.
26) Relationships among male sexually selected traits in the bean bug Riptortus pedestris (Heteroptera: Alydidae).
Suzaki Y, Katsuki M, Miyatake T, Okada Y
Entomological Science (2015) 18(2), 278-282.
25) Sexually-dimorphic body color is regulated by sex-specific expression of yellow gene in the ponerine ant, Diacamma sp.
Miyazaki S, Okada Y, Miyakawa H, Tokuda G, Cornette R, Koshikawa S, Maekawa K, Miura T.
PLoS ONE (2014) 9(3): e92875
24) Male Courtship Behavior and Weapon Trait as Indicators of Indirect Benefit in the Bean Bug, Riptortus pedestris.
Suzaki Y, Katsuki M, Miyatake T, Okada Y.
PLoS ONE (2013) 8(12): e83278. doi:10.1371/journal.pone.0083278
23) Morphological variability of intercastes in the ant Temnothorax nylanderi: pattern of trait expression and modularity.
Okada Y, Plateaux L, Peeters C.
Insectes Sociaux (2013) 60: 319-328
22) Soldier morphogenesis in the damp-wood termite is regulated by the insulin signaling pathway.
Hattori A, Sugime Y, Sasa C, Miyakawa H, Ishikawa Y, Miyazaki S, Okada Y, Cornette Y, Corley L, Emlen DJ, Miura T.
Journal of Experimental Zoology Part B: Molecular and Developmental Evolution (2013) 320: 295-306
21) Heat shock proteins mediate trade-offs between early-life reproduction and late survival.
Okada, Y., Teramura, K. and Takahashi, K. H.
Physiological Entomology (2014) 39(4), 304-312.
20) Genetic correlation between the pre-adult developmental period and locomotor activityrhythm in Drosophila melanogaster.
Takahashi K., Teramura K., Muraoka S, Okada Y., Miyatake T.
Heredity (2013)110, 312–320; doi:10.1038/hdy.2012.88
19) Impacts of diet quality on life-history and reproductive traits in male and female armed beetle, Gnatocerus cornutus.
Katsuki M, Okada Y, Okada K.
Ecological Entomology (2012) 37: 463-470.
18) Juvenile hormone mediates developmental integration between exaggerated traits and supportive traits in the horned flour beetle Gnatocerus cornutus
Okada Y., Gotoh H., Miura T., Miyatake T., Okada K.
Evolution & Development (2012) 14: 363-371.
17) Effect of weapon-supportive traits on fighting success in armed insects
Okada Y., Suzaki Y., Miyatake T., Okada K.
Animal Behaviour (2012) 83, 1001-1006
16) Deficiency screening for genomic regions with effects on environmental
sensitivity of the sensory bristles of Drosophila melanogaster
Takahashi K., Okada Y., Teramura K.
Evolution (2012) 66: 2878-2890.
15) Screening of up-regulated genes induced by high density in the vetch aphid Megoura crassicauda.
Ishikawa A., Ishikawa Y., Okada Y., Miyazaki S., Miyakawa H., Koshikawa S., Brisson J. A., Miura T.
Journal of Experimental Zoology Part A: Ecological Genetics and Physiology (2012) 317, 194-203
14) Male aggressive behavior and exaggerated hindlegs of the bean bug Riptortus pedestris
Okada K., Suzaki Y., Okada Y., Miyatake T.
Zoological Science (2011) 28, 659-663
13) Genome-wide deficiency mapping of the regions responsible for temporal canalization of the developmental processes of Drosophila melanogaster.
Takahashi K., Okada Y., Teramura K.
Journal of Heredity (2011) 102, 448-457
12) Immature performance linked with exaggeration of a sexually selected trait in an armed beetle.
Okada K., Katsuki M., Okada Y., Miyatake T.
Journal of Evolutionary Biology (2011) 24, 1737-1743
11) Deficiency mapping of the genomic regions associated with effects on developmental stability in Drosophila melanogaster
Takahashi K., Okada Y., Teramura K., Tsujino M.
Evolution (2011) 65, 3565-3577
10) Genome-wide deficiency screen for the genomic regions responsible for heat resistance in Drosophila melanogaster.
Takahashi K., Okada Y., Teramura K.
BMC Genetics (2011) 12, 57
9) Juvenile hormone regulates extreme mandible growth in male stag beetles．
Gotoh H., Cornette R., Koshikawa S., Okada Y., Lavine L.C., Emlen D.J., Miura T.
PLoS One (2011) 6, e21139
8) Identification of a reproductive-specific, putative lipid transport protein gene in a queenless ponerine ant Diacamma sp.
Okada Y., Miyazaki S., Koshikawa S., Cornette R., Maekawa K., Tsuji K., Miura T.
Naturwissenschaften (2010) 97, 971-979
7) Ovarian development and insulin-signaling pathways during reproductive differentiation in the queenless ponerine ant Diacamma sp.
Okada Y., Miyazaki S., Miyakawa H., Ishikawa A., Tsuji K., Miura T
Journal of Insect Physiology (2010) 56, 288-295
6) Gene expression changes during caste-specific neuronal development in the damp-wood termite Hodotermopsis sjostedti.
Ishikawa Y., Okada Y., Ishikawa A., Miyakawa H., Koshikawa S., Miura T.
BMC Genomics (2010) 11, 314
5) Gene up-regulation in response to predator kairomones in the water flea,Daphnia pulex.
Miyakawa H., Imai M., Sugimoto N., Ishikawa Y., Ishikawa A., Ishigaki H., Okada Y., Miyazaki S., Koshikawa S., Cornette R., Miura T.
BMC Developmental Biology (2010) 10, 45
4) Morph-dependent form of asymmetry in mandible of the stag beetle Prosopocoilus inclinatus (Coleoptera: Lucanidae)
Okada Y*., Fujisawa H., Kimura Y., Hasegawa E.
Ecological Entomology (2008) 33, 684-689
3) Allometric dimorphism in the larvae of the salamander Hynobius retardatus.
Okada Y*. and Hasegawa E.
Ethology Ecology & Evolution (2007) 19, 113-126
2) Morphological differences between sexes in the ponerine ant Diacamma sp. (Formicidae: Ponerinae).
Okada Y., Tsuji K. and Miura T*.
Sociobiology (2006) 48, 527-541
1) Size-dependent precopulatory behavior as mate-securing tactic in the Japanese stag beetle, Prosopocoilus inclinatus (Coleoptera; Lucanidae).
Okada Y*., Hasegawa E.
Journal of Ethology (2005) 23, 99-102