Dai Shizuka
Daizaburo Shizuka
Research Assistant Professor

Ph.D. University of California-Santa Cruz, 2009
         (Ecology & Evolutionary Biology)
B.A. Brown University, 2001
Contact Information
410 Manter Hall


 Shizuka Lab

Research Interests

Social interactions play a central role in ecology and evolution of animals. My goal is to link mechanisms of social behavior with evolutionary patterns: What determines the outcomes of particular social encounters, and why does it matter? My research is primarily conducted in the field and my questions are grounded in the natural history of the animal I am studying. I like to consider social interactions in the context of the animal’s entire lifetime: earlier experiences, seasonality, and life history stage of the animal has much to do with how they view their social environment. Moreover, the social environment itself—i.e., the organization of the social groups (or lack thereof) in which the animal lives—sets the stage for how animals should interact with others. Ultimately, these factors influence big evolutionary processes such as coevolution, speciation, and evolution of societies.

Main threads of my research include:

  • Elucidating the mechanisms of parent-offspring recognition and how this mechanism affects the process of coevolution between avian brood parasites and their hosts.
  • Understanding family dynamics through the lens of life history theory and intrafamilial conflict.
  • Studying how predispositions in learning songs and species cues evolve and how these learning mechanisms contribute to patterns of hybridization and gene introgression.
  • Using network theory to understand general patterns in social organization.
  • Uncovering various aspects of the social lives of migrant sparrows at their wintering grounds.

Recent Publications

Shizuka, D., Chaine, A.S., Anderson, J., Johnson, O., Laursen, I.M., and Lyon, B.E. (2014) Across-year social stability shapes network structure in wintering migrant sparrows. Ecology Letters. 8: 998-1007.

Shizuka, D. (2014) Song discrimination before song learning in free-living sparrows. Animal Behaviour 92: 19-24.

Pinter-Wollman, N., Hobson, E.A., Smith, J.E., Edelman, A.J., Shizuka, D., Waters, J.S., de Silva, S., Prager, S.D., Sasaki, T., Wittemyer, G. Fewell, J., and McDonald, D.B. (2014). Dynamics of animal social networks: Analytical, conceptual and theoretical advances. Behavioral Ecology.

Chaine, A. S., Roth, A.M., Shizuka, D. & B. E. Lyon. (2013) Experimental confirmation that avian plumage traits function as multiple status signals in winter contests. Animal Behaviour. 86: 409-415.

Shizuka, D. and Lyon, B.E. (2013). Family dynamics through time: Brood reduction followed by parental compensation with aggression and favoritism. Ecology Letters 16: 315-322.

McDonald, D. B. and Shizuka, D. (2013). Comparative transitive and temporal orderliness in dominance networks. Behavioral Ecology 24: 511-520.

Shizuka, D. and McDonald, D.B. (2012). A social network perspective on measurements of dominance hierarchies. Animal Behaviour 83: 925-934.

Arnold, T. W., Shizuka, D., Lyon, B.E., Pelayo, J.T., Mehl, K.R., Taylor, J.J., Reed, W.L. and Amundson, C.L. (2011). Use of nape tags for marking offspring of precocial waterbirds. Waterbirds 34: 312-318.

Shizuka, D. and Lyon, B.E. (2011). Hosts improve the reliability of chick recognition by delaying  the hatching of brood parasitic eggs. Current Biology. 21:515-519.

Chaine, A.S., Tjernell, K.A., Shizuka, D. and Lyon, B.E. (2011). Sparrows use multiple status signals in winter social flocks. Animal Behaviour 81: 447-453.

Lyon, B.E. and Shizuka, D. (2010). Communal Breeding: Clever Defense Against Cheats. Current Biology. 20: R931-R933.

Shizuka, D. and Lyon, B.E. (2010). Coots use hatch order to learn to recognize and reject conspecific brood parasite chicks. Nature. 463: 223-226.