Kazuya KOBAYASHI, Ph.D.

Junior associate professor in Hokkaido Forest Research Station, Field Science Education and Research Center, Kyoto university

Sex is a ubiquitous phenomenon on the earth. For the sexual reproduction, females need to invest in male function (sons or pollen) that cannot contribute to population growth. If the natural selection chooses reproductive system based solely on efficiency, any organisms will use asexual reproduction but the real is not. This has been a long-lived mystery for evolutionary biologists. Another aspect of sex is a source of diversity. Since Darwin’s era, some traits of males has been recognized as useless for survival but beneficial for mating: singing songs and dressed with beautiful feathers to attract females, or armed by weapons to fight. The natural world is glittering with wide variety of such sexual traits but the mechanism sustaining these diversity is also a large mystery for ecologists. I’m challenging to solve these mysteries with theory and empirical test.

CV

  • 2003.4-2007.3 B.E. degree at Graduate School of Agriculture, Hokkaido University
  • 2007.4-2009.3 M.E. degree at Graduate School of Agriculture, Hokkaido University
  • 2009.4-2012.3 Ph.D. degree at Graduate School of Agriculture, Hokkaido University
  • 2012.4-2014.3 Reserach assistant at Insect ecology lab., Graduate School of Agriculture, Kyoto University
  • 2014.4-2017.1 JSPS Reserach fellow (PD) at Insect ecology lab., Graduate School of Agriculture, Kyoto University
  • 2017.2-present Junior associate professor in Hokkaido Forest Research Station, Field Science Education and Research Center, Kyoto university

SNS (mainly in Japanese)

Links

Contact Information

Hokkaido Forest Research Station, Field Science Education and Research Center, Kyoto university
553 Tawa, Shibecha-cho, Kawakami-gun, Hokkaido 088-2339, Japan
e-mail: kobakaz.jp (at) gmail.com
Tel: +81-(0)15-485-2637
Fax: +81-(0)15-485-4016

Publications

Google Scholar Citations
ORCID: 0000-0002-9475-6807
  1. Kenji Matsuura, Nobuaki Mizumoto, Kazuya Kobayashi, Tomonari Nozaki, Tadahide Fujita, Toshihisa Yashiro, Taro Fuchikawa, Yuki Mitaka & Edward L. Vargo.

    A genomic imprinting model of termite caste determination: Not genetic but epigenetic inheritance influences offspring caste fate.

    American Naturalist. American Society of Naturalists. Vol.191: 677-690. 2018.
  2. Eisuke Tasaki, Kazuya Kobayashi, Kenji Matsuura & Yoshihito Iuchi.

    Long-lived termite queens exhibit high Cu/Zn-superoxide dismutase activity.

    Oxidative medicine and cellular longevity. Hindawi. Vol.2018: Article ID 5127251. 2018.
  3. Eisuke Hasegawa, Nobuaki Mizumoto, Kazuya Kobayashi, Shigeto Dobata, Jin Yoshimura, Saori Watanabe, Yuuka Murakami & Kenji Matsuura.

    Nature of collective decision-making by simple yes/no decision units.

    Scientific Reports. Nature publishing group. Vol.7: Article 14436. 2017.
  4. Yuki Mitaka, Kazuya Kobayashi & Kenji Matsuura.

    Caste-, sex-, and age-dependent expression of immune-related genes in a Japanese subterranean termite, Reticulitermes speratus.

    PLOS ONE. Public Library of Science. Vol.12: e0175417. 2017.
  5. Kazuya Kobayashi.

    Sex allocation promotes the stable co-occurrence of competitive species.

    Scientific reports. Nature publishing group. Vol.7: Article 43966. 2017.
  6. Eisuke Tasaki, Kazuya Kobayashi, Kenji Matsuura & Yoshihito Iuchi.

    An efficient antioxidant system in a long-lived termite queen.

    PLOS ONE. Public Library of Science. Vol.12: e0167412. 2017.
  7. Shuichiro Imai, Kazuya Kobayashi, Yusaku Ohkubo, Norihiro Yagi, & Eisuke Hasegawa.

    Difference in evolutionary patterns of strongly or weakly selected characters among ant populations.

    Scientific reports. Nature publishing group. Vol.6: Article 39451. 2016.
  8. Kazuya Kobayashi* & Yasushi Miyaguni*.

    Facultative parthenogenesis in the Ryukyu drywood termite Neotermes koshunensis.

    Scientific reports. Nature publishing group. Vol.6: Article 30712. 2016. *:Equal contributors
  9. Kazuya Kobayashi & Eisuke Hasegawa.

    A female-biased sex ratio reduces the twofold cost of sex.

    Scientific reports. Nature publishing group. Vol.6: Article 23982. 2016.
  10. Eisuke Hasegawa, Yasunori Ishii, Koichiro Tada, Kazuya Kobayashi & Jin Yoshimura.

    Lazy workers are necessary for long-term sustainability in insect societies.

    Scientific reports. Nature publishing group. Vol.6: Article 20846. 2016.
  11. Yuki Mitaka*, Kazuya Kobayashi*, Alexander Mikheyev, Mandy M. Y. Tin, Yutaka Watanabe & Kenji Matsuura.

    Caste-specific and sex-specific expression of chemoreceptor genes in a termite.

    PLOS ONE. Public Library of Science. Vol.11: e0146125. 2016. *:Equal contributors
  12. Nobuaki Mizumoto, Kazuya Kobayashi & Kenji Matsuura.

    Emergence of intercolonial variation in termite shelter tube patterns and prediction of its underlying mechanism.

    Royal Society Open Science. Royal society publishing. Vol.2: 150360. 2015.
  13. Misato Okamoto, Kazuya Kobayashi, Eisuke Hasegawa & Kyohsuke Ohkawara.

    Sexual and asexual reproduction of queens in a myrmicine ant, Vollenhovia emeryi (Hymenoptera: Formicidae).

    Myrmecological News. Austrian Society of Entomofaunistics. Vol.21: pp.13-17. 2015.
  14. Hiromi Asanuma, Satoshi Kakishima, Hiromu Ito, Kazuya Kobayashi, Eisuke Hasegawa, Takahiro Asami, Kenji Matsuura, Derek A. Roff & Jin Yoshimura.

    Evolutionary optimality in sex differences of longevity and athletic performances.

    Scientific reports. Nature publishing group. Vol.4: Article 5425. 2014.
  15. Kazuya Kobayashi, Jin Yoshimura & Eisuke Hasegawa.

    Coexistence of sexual individuals and genetically isolated asexual counterparts in a thrips.

    Scientific reports. Nature publishing group. Vol.3: Article 3286. 2013.
  16. Kazuya Kobayashi, Eisuke Hasegawa, Yuuka Yamamoto, Kazutaka Kawatsu, Edward L. Vargo, Jin Yoshimura & Kenji Matsuura.

    Sex ratio biases in termites provide evidence for kin selection.

    Nature Communications. Nature publishing group. Vol.4: Article 2048. 2013.
  17. Kazuya Kobayashi & Eisuke Hasegawa.

    Isolation of microsatellite loci from the onion thrips, Thrips tabaci.

    Journal of Insect Science. University of Wisconsin Libraries. Vol.13: Article 30, 2013.
  18. Kazuya Kobayashi & Eisuke Hasegawa.

    Discrimination of reproductive forms of Thrips tabaci Lindeman (Thysanoptera: Thripidae) by PCR with sequence specific primers.

    Journal of Economic Entomology. Entomological Society of America. Vol.105: pp.555-559, 2012.
  19. Kazuya Kobayashi, Kei Tamura, Misato Okamoto, Eisuke Hasegawa & Kyohsuke Ohkawara.

    Phylogenetic relationships among populations of Vollenhovia ants, with particular focus on the evolution of wing morphology.

    Annals of the entomological society of America. Entomological Society of America. Vol. 105: pp.454-461, 2012.
  20. Eisuke Hasegawa, Izumi Yao, Kyoko Futami, Norihiro Yagi, Kazuya Kobayashi & Shin-ichi Kudo.

    Isolation of microsatellite loci from the millipede, Brachycybe nodulosa Verhoeff.

    Conservation Genetics Resources. Springer. Vol.4: pp.89-91, 2012.
  21. Eisuke Hasegawa, Kazuya Kobayashi, Norihiro Yagi & Kazuki Tsuji.

    Complete mitochondrial genomes of normal and cheater morphs in the parthenogenetic ant Pristomyrmex punctatus (Hymenoptera: Formicidae).

    Myrmecological news. Austrian Society of Entomofaunistics. Vol.15: pp.85-90. 2011.
  22. Kazuya Kobayashi, Eisuke Hasegawa & Kyohsuke Ohkawara.

    No gene flow between wing forms and clonal reproduction by males in the long-winged form of the ant Vollenhovia emeryi.

    Insectes Sociaux. Springer. Vol.58: pp.163-168. 2011.
  23. Kazuya Kobayashi, Eisuke Hasegawa & Kyohsuke Ohkawara.

    Clonal reproduction by males in the ant Vollenhovia emeryi (Wheeler).

    Entomological Science. Blackwell publishing. Vol.11: pp.167-172. 2008.
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