CONTACT:
E-mail: sachi.dwarfmale<at>gmail.com, sachiy<at>lab.twcu.ac.jp
2-6-1 Zempukuji, Suginami-ku, Tokyo 167-8585, Japan
CURRENT POSITION:
Lecturer
Division of Mathematical Sciences, Tokyo Woman's Christian University
EDUCATION:
B.S. Nara Women’s University, Japan, 2005 (Physics)
M.S. Nara Women’s University, Japan, 2007 (Mathematical Biology)
Ph.D. Nara Women’s University, Japan, 2009 (Mathematical Biology)
PROFESSIONAL EXPERIENCE:
Japan Society for the Promotion of Science for Young Scientists, DC2 (2008.4-2009.9)
Japan Society for the Promotion of Science for Young Scientists, PD (2009.10-2013.3)
Research Associate, Department of Information Systems Creation, Kanagawa University (2013.4-2016.3)
Assistant Professor, Department of Information Systems Creation, Kanagawa University (2016.4-2018.3)
Postdoctoral Fellow, KYOUSEI Science Center for Life and Nature, Nara Women's University (2018.4-2020.3)
Lecturer (temporary), College of Humanities and Sciences, Nihon University (2019.4-2020.3)
Lecturer (temporary), Musashino Art University (2019.9-2020.3)
RESEARCH INTERESTS:
Barnacles are marine crustaceans which distribute intertidal area to deep-seas in world wide. Interestingly, they have various sexual systems depending on species, that is, simultaneous hermaphroditism, androdioecy (simultaneous hermaphrodites and males) and dioecy (females and males). Barnacle males are very small and called “dwarf males”. Why so small males are adaptive and evolve? To explain this question, I make mathematical models and take field research.
SELECTED PUBLICATIONS:
S. Yamaguchi, K. Sawada, Y. Yusa, and Y. Iwasa. Dwarf males, large hermaphrodites, and females in marine species: a dynamic optimization model of sex allocation and growth. Theoretical Population Biology, 85:49-57 (2013)
S. Yamaguchi, Y. Yusa, K. Sawada and S. Takahashi. Sexual systems and dwarf males in barnacles: integrating life history and sex allocation theories, Journal of Theoretical Biology, 320: 1-9 (2013)
S. Yamaguchi, S. Seki, K. Sawada and S. Takahashi. Small and poor females change sex: a theoretical and empirical study on protogynous sex change in a triggerfish under varying resource abundance, Journal of Theoretical Biology, 317: 186-191 (2013)
S. Yamaguchi, EL. Charnov, K. Sawada and Y. Yusa. Sexual systems and life history of barnacles: a theoretical perspective, Integrative and Comparative Biology, 52: 356-365 (2012)
S Yamaguchi, Y. Yusa, S. Yamato, S. Urano and S. Takahashi. Mating group size and evolutionarily stable pattern of sexuality in barnacles, Journal of Theoretical Biology, 253: 61-73 (2008).
S. Yamaguchi, Y. Ozaki, Y. Yusa and S. Takahashi. Do tiny males grow up? Sperm competition and optimal resource allocation schedule of dwarf males of barnacles, Journal of Theoretical Biology, 245: 319-328 (2007).