Masato Yoshizawa

Masato Yoshizawa

Assistant Professor

I am interested in the evolutionary mechanisms that generate novel "adaptive" function in animals.

Contact

Room

EDM 414

Phone

(808) 956-6682

Fax

(808) 956-4745

Academic Degrees

Ph.D., Neurobiology

Research Interests

I am interested in the evolutionary mechanisms that generate novel "adaptive" function in animals. I am currently using the Mexican tetra cavefish, as a model system to resolve the relationship among genome, developmental changes, morphological/physiological shifts, behavioral adaptation and ecology. My team uses a combination of the Next-Gen sequencing, high-speed microscopy, live calcium imaging, genome editing, neural tracing, hybrid analyses (genetics) and behavioral assays to resolve the dynamics of how animals acquire novel neural functions.

Selected Publications

Yoshizawa, M. (2016). The evolution of sensory adaptation in Astyanax mexicanus. Pp. 247–263 in A. C. Keene, M. Yoshizawa, and S. E. McGauch, eds. Biology and Evolution of the Mexican Cavefish. Elsevier Inc., Amsterdam.

Yoshizawa, M. (2015). Behaviors of cavefish offer insight into developmental evolution. Melecular Reprod. Dev. 82: 268-280.

Yoshizawa, M., Robinson, B. G., Duboué, E. R., Masek, P., Jaggard, J. B., O’Quin, K. E., Borowsky, R. L., Jeffery, W. R. and Keene, A. C. (2015). Distinct genetic architecture underlies the emergence of sleep loss and prey-seeking behavior in the Mexican cavefish. BMC Biol. 13: 15.

McGaugh, S.E., Gross, J.B., Aken, B., Blin, M., Borowsky, R., Chalopin, D., Hinaux, H., Jeffery, W.R., Keene, A., Ma, L., Minx, P., Murphy, D., O’Quin, K.E., Rétaux, S., Rohner, N., Searle, S.M.J., Stahl, B.A., Tabin, C., Volff, J.-N., Yoshizawa, M., Warren, W.C. (2014) The cavefish genome reveals candidate genes for eye loss. Nat. Commun.  5:5307.

Yoshizawa, M., Jeffery, W.R., van Netten, S.M., and McHenry, M.J. (2014). The sensitivity of lateral line receptors and their role in the behavior of Mexican blind cavefish (Astyanax mexicanus). J. Exp. Biol. 217: 886-895.

Rohner, N., Jarosz, D.F., Kowalko, J., Yoshizawa, M., Jeffery, W.R., Borowsky, R.L., Lindquist, S., and Tabin, C.J. (2013). Cryptic variation in morphological evolution: HSP90 as a capacitor for the loss of eyes in cavefish.  Science 342: 1372-1375 (Featured in News & Analysis section of Science: Pennisi, E. (2013). Cavefish study supports controversial evolutionary mechanism. Science 342: 1304.)

Kowalko, J.E., Rohner, N., Linden, T.A., Rompani, S.B., Warren, W.C., Borowsky, R., Tabin, C.J., Jeffery, W.R., Yoshizawa, M. (2013b). Convergence in feeding posture occurs through different genetic loci in independently evolved cave populations of Astyanax mexicanus. Proc. Natl. Acad. Sci. U.S.A. 110: 16933-16938.

Yoshizawa, M.*, O’Quin, K. E., Jeffery, W. R. (2013a). QTL clustering as a mechanism for rapid multi-trait evolution. Commun. Integr. Biol. 6: e24548 (comment on a conflict between Fisher’s cost of complexity and abundant QTL clustering).

Yoshizawa, M.*, Yamamoto, Y., O’Quin, K. E., Jeffery, W. R. (2012b). Evolution of an adaptive behavior and its sensory receptors facilitates eye regression in blind cavefish. BMC Biol. 10: 108. [Commented in Gunter, H., Meyer, A. (2013) Trade-offs in cavefish sensory capacity. BMC Biol. 11:5].

Yoshizawa, M.*, Ashida, G., Jeffery, W. R. (2012a). Parental genetic effects in a cavefish adaptive behavior explain disparity between nuclear and mitochondrial DNA. Evolution 66: 2975–2982.

Yoshizawa, M.*, Jeffery, W. R. (2011). Evolutionary tuning of an adaptive behavior requires enhancement of the neuromast sensory system. Commun. Integr. Biol. 4: 89-91.

Yoshizawa, M.*, Gorički, Š., Soares, D., Jeffery, W. R. (2010) Evolution of a behavioral shift mediated by superficial neuromasts helps cavefish find food in darkness.  Curr. Biol. 20: 1631-1636. 

Yoshizawa, M., Kawauchi, T., Sone, M., Terao, M., Nabeshima, Y. –i. and Hoshino, M. (2005). Involvement of a Rac activator, P-Rex1, in neurotrophin-derived signaling and neuronal migration.  J. Neurosci. 25: 4406-4419.