Dr. Ryuichi Okada
研究業績：学術論文Original papers
学術論文 original papers
Wang Z, Chen X, Okada R, Walter S, Menzel R. (2025)Encoding and decoding of the information in the honeybee waggle dance.
Behav Ecol Sociobiol, 79: 53. doi: https://doi.org/10.1007/s00265-025-03593-5
*Okada R, Ito Y, Yamasaki M. (2025)
Antennal responses to volatiles related to host location in the ambrosia beetle Platypus quercivorus (Murayama).
J Chem Ecol, 51:27 doi: 10.1007/s10886-025-01580-8 (*: corresponding authors)
Sawada Y, Sato N, Osawa T, Matsumoto K, Chiu MC, Okada R, Sakura M, Sato T. (2024)
A potential evolutionary trap for the extended phenotype of a nematomorph parasite.
PNAS Nexus, 3: pgae464. doi: 10.1093/pnasnexus/pgae464
Mishina T, Chiu MC, Hashiguchi Y, Oishi S, Sasaki A, Okada R, Uchiyama H, Sasaki T, Sakura M, Takeshima H, Sato T. (2023)
Massive horizontal gene transfer and evolution of nematomorph-driven behavioral manipulation of mantids.
Curr Biol, 33:4988-4994. doi: 10.1016/j.cub.2023.09.052
Kobayashi N, Hasegawa Y, *Okada R, *Sakura M. (2023)
Visual learning in tethered bees modifies flight orientation and is impaired by epinastine.
J Comp Physiol A , 209: 529-539. doi: 10.1007/s00359-023-01623-z (*: corresponding authors)
Matsubara N, Okada R, Sakura M. (2021)
Possible role of polarized light information on spatial recognition in the cricket Gryllus bimaculatus.
Zool Sci, 38:297-304. doi: 10.2108/zs200081
Pham DL, Ito Y, Okada R, Ikeno H, Kazama H, Mori N, Yamasaki M. (2021)
Females invest more energy in flight: flight characteristics of Platypus quercivorus (Murayama) revealed by a flight mill.
J For Res, 26: 141-151. doi: 10.1080/13416979.2021.1872761
Yamamoto T, Sugahara M, Okada R, Ikeno H(2021)
Differences between queen piping temporal structures of two honeybee species, Apis cerana and Apis mellifera.
Apidologie, 52:524-534. doi: 10.1007/s13592-021-00840-2
Pham DL, Ito Y, Okada R, Ikeno H, Kazama H, Mori N, Yamasaki M. (2020)
Ambrosia beetles Platypus quercivorus (Murayama) (Coleoptera: Platypodidae) use leaf volatiles in host selection.
Entomol Exp Appl, 168: 928-939. doi: 10.1111/eea.12993
Kobayashi N, Okada R, Sakura M. (2020)
Orientation to polarized light in tethered flying honeybees.
J Exp Biol, 223:jeb228254. doi:10.1242/jeb228254
Pham DL, Ito Y, Okada R, Ikeno H, Isagi Y, Yamasaki M. (2019)
Effects of leaf conditions and flight activity on the behavior of Platypus quercivorus (Murayama) (Coleoptera: Platypodidae).
J Appl Entomol, 143: 1000-1010. dio: 10.1111/jen.12671
Kimura T, Ohashi M, Crailsheim K, Schmickl T, Okada R, Radspieler G, Isokawa T, Ikeno H. (2019)
A heuristic trajectory decision method to enhance the tracking performance of multiple honeybees on a flat laboratory arena.
Trans ISCIE, 32: 113-122.
*Okada R, Pham DL, Ito Y, Yamasaki M, Ikeno H (2018)
Measuring the flight ability of the ambrosia beetle, Platypus quercivorus (Murayama), using a low-cost, small, and easily constructed flight mill.
J Vis Exp, 138: e57468. doi:10.3791/57468. (*: corresponding author)
Pham DL, Ito Y, Okada R, Ikeno H, Isagi Y, Yamasaki M (2017)
Phototactic behavior of the ambrosia beetle, Platypus quercivorus (Murayama) (Coleoptera: Platypodidae), before and after flight.
J Insect Behav, 30: 318-330. doi:10.1007/s10905-017-9615-3.
*Okada R, Ikeno H, Kimura T, Ohashi M, Aonuma H, Ito E (2014)
Error in the honeybee waggle dance improves foraging flexibility.
Sci Rep, 4: 4175. doi:10.1038/srep04175. (*: corresponding author)
Kimura T, Ohashi M, Crailsheim K, Schmickl T, Okada R, Radspieler G, Ikeno H (2014)
Development of a new method to track multiple honeybees with complex behariors on a flat laboratory arena.
PLoS One, 9: e84656. doi:10.1371/journal.pone.0084656.
Mita K, Okuta A, Okada R, Hatakeyama D, Otsuka E, Yamagishi M, Morikawa M, Naganuma Y, Fujito Y, Dyakonova V, Lukowiak K, Ito E (2014)
What are the elements of motivation for acquisitioned taste aversion?
Neurobiol Learn Mem, 107: 1-12.
Otsuka E, Matsunaga M, Okada R, Yamagishi M, Okuta A, Lukowiak K, Ito E (2013)
Increase in cyclic AMP concentration in a cerebral giant interneuron mimics part of a memory trace for conditioned taste aversion of the pond snail.
Biophysics, 9: 161-166.
Ito E, Watabe S, Morikawa M, Kodama H, Okada R, Miura T (2013)
Detection of H2O2 by fluorescence correlation spectroscopy.
Method Enzymol, 526: 135-143.
Murakami J, Okada R, Fujito Y, Sakakibara M, Lukowiak K, Ito E (2013)
Paired pulse ratio analysis of insulin-induced synaptic plasticity in the snail brain.
J Exp Biol, 216: 1771-1773.
Murakami J, Okada R, Sadamoto H, Kobayashi S, Mita K, Sakamoto Y, Yamagishi M, Hatakeyama D, Otsuka E, Okuta A, Sunada H, Takigami S, Sakakibara M, Fujito Y, Awaji M, Moriyama S, Lukowiak K, Ito E (2013)
Involvement of insulin-like peptide in long-term synaptic plasticity and long-term memory of the pond snail Lymnaea stagnalis.
J Neurosci, 33: 371-383
Ito E, Otsuka E, Hama N, Aonuma H, Okada R, Hatakeyama D, Fujito Y, Kobayashi S (2012)
Memory trace in feeding neural circuitry nuderlying conditioned taste aversion in Lymnaea.
PLoS ONE, 7: e43151
*Okada R, Ikeno H, Kimura T, Ohashi M, Aonuma H, Ito E (2012)
Mathematical analysis of the honeybee waggle dance.
Acta Biol Hung, 63 (suppl.2): 75-79. (*: corresponding author)
*Okada R, Akamatsu T, Iwata K, Ikeno H, Kimura T, Ohashi M, Aonuma H, Ito E. (2012)
Waggle dance effect: dancing in autumn reduces the weight loss of a honeybee colony.
J Exp Biol, 215: 1633-1641. (*: corresponding author)
(featured in InsideJEB)
#Sakura M, #Okada R, Aonuma H (2012)
Evidence for instantaneous e-vector detection in the honeybee using an associative learning paradigm.
Proc R Soc B, 279: 535-542. (#: equal contributions)
Kimura T, Ohashi M, Okada R, Ikeno H (2011)
A new approach for the simultaneous tracking of multiple honeybees for analysis of hive behavior.
Apidologie, 42: 607-617.
Watabe S, Sakamoto Y, Morikawa M, Okada R, Miura T, ItoE (2011)
Highly sensitive determination of hydrogen peroxide and glucose by fluorescence correlation spectroscopy.
PLoS ONE, 6: e22955
*Okada R, Ikeno H, Kimura T, Ohashi M, Aonuma H, Ito E (2010)
Markov model of honeybee sicial behavior.
Information, 13: 1115-1130. (*: corresponding author)
Ohashi M, Okada R, Kimura T, Ikeno H (2009)
Observation system for the control of the hive environment by the honeybee (Apis mellifera).
Behav Res Methods, 41: 782-786.
*Okada R, Awasaki T, Ito K (2009)
Gamma-aminobutyric acid (GABA)-mediated neural connections in the Drosophila antennal lobe.
J Comp Neurol, 514: 74-91. (*: corresponding author)
Das A, Sen S, Lichtneckert R, Okada R, Ito K, Rodrigues V, Reichert H (2008)
Drosophila olfactory local interneurons and projection neurons derive from a common neuroblast lineage specified by the empty spiracles gene.
Neural Dev, 3: 33 (online journal)
Silbering AF, Okada R, Ito K, Galizia CG (2008)
Olfactory information processing in the Drosophila antennal lobe: Anything goes?
J Neurosci, 28: 13075-13087.
*Okada R, Ikeno H, Aonuma H, Ito E (2008)
Biological insights into robotics: honeybee foraging behavior by waggle dance.
Adv Robotics, 22: 1665-1681. (*: corresponding author)
*Okada R, Ikeno H, Sasayama N, Aonuma H, Kurabayashi D, Ito E (2008)
The dance of the honeybee: how do they dance to transfer the food information effectively?
Acta Biol Hung, 59 (suppl): 157-162. (*: corresponding author)
Aono K, Fusada A, Fusada Y, Ishii W, Kanaya Y, Komuro M, Matsui K, Meguro S, Miyamae A, Miyamae Y, Murata A, Narita S, Nozaka H, Saito W, Watanabe A, Nishikata K, Kanazawa A, Fujito Y, Okada R, Lukowiak K, Ito E (2008)
Speed of back-swimming of Lymnea
Acta Biol Hung, 59 (suppl): 105-109.
Sachse S, Rueckert E, Keller A, Okada R, Tanaka NK, Ito K, Vosshall LB (2007)
Activity-dependent plasticity in an olfactory circuit.
Neuron, 56: 838-850.
*Okada R, Rybak J, Manz G, Menzel R (2007)
Learning-related plasticity in PE1 and other mushroom body-extrinsic neurons in the honeybee brain.
J Neurosci, 27: 11736-11747. (*: corresponding author)
(with a cover page for Journal of Neuroscience of the Nov 28th issue)
Okada R, Sakura M, Mizunami M (2003)
Distribution of dendrites of descending neurons and its implications
for the basic organization of the cockroach brain.
J Comp Neurol, 458: 158-174.
Ito K, Okada R, Tanaka NK, Awasaki T (2003)
Cautionary observations on preparing and interpreting brain images using molecular biology-based staining techniques.
Microsco Res and Techn, 62: 170-186.
Sakura M, Okada R, Mizunami M (2002)
Olfactory discrimination of structurally similar alcohols by cockroaches.
J Comp Physiol A, 188: 787-797.
Okada R, Ikeda J, Mizunami M (1999)
Sensory responses and movement-related activities in extrinsic neurons of the cockroach mushroom bodies.
J Comp Physiol A, 185: 115-129.
Mizunami M, Iwasaki M, Okada R, Nishikawa M (1998)
Topography of modular subunits in the mushroom bodies of the cockroach.
J Comp Neurol, 399: 153-161.
Mizunami M, Iwasaki M, Okada R, Nishikawa M (1998)
Topography of four classes of Kenyon cells in the mushroom bodies of the cockroach.
J Comp Neurol, 399: 162-175.
Mizunami M, Okada R, Li YS, Strausfeld NJ (1998)
Mushroom bodies of the cockroach: activity and identities of neurons recorded in freely moving animals.
J Comp Neurol, 402: 501- 519.
Mizunami M, Iwasaki M, Nishikawa M, Okada R (1997)
Modular structures in the mushroom body of the cockroach.
Neurosci Lett, 229: 153-156.
Apr 8, 2025