Ph.D., Anatomy, SUNY Stony Brook, 1995 B.A., Geology, University of Pennsylvania, 1988 Dr. Walker joined the Biology Department at USM in 2000 after postdoctoral work at the Field Museum in Chicago. He is a physiologist with expertise in the evolution of functional systems, and his research combines computational and empirical approaches. Dr. Walker regularly teaches Human Physiology (BIO 221, 223). He also occasionally teaches the organismal biology course (BIO 107) and the plant and animal physiology course (BIO 109) in the introductory biology sequence, as well as courses in Applied Biostatistics (BIO 413/513) and Research Methods (BIO 601).

Walker, J.A. 2016. Monte Carlo simulation of OLS and linear mixed model inference of phenotypic effects on gene expression. PeerJ 4:e2575 https://doi.org/10.7717/peerj.2575. Diamond, K.M., Schoenfuss, H.L., Walker, J.A., and Blob, R.W. 2016. Flowing water affects fish fast-starts: escape performance of the Hawaiian stream goby, Sicyopterus stimpsoni. Journal of Experimental Biology 219: 3100-3105. Conradsen, C., Walker, J.A., Perna, C., and McGuigan, K. 2016. Repeatability of locomotor performance and morphology–locomotor performance relationships. Journal of Experimental Biology 219: 2888-2897. Walker, J.A. and Caddigan, S. P. 2015. Performance trade-offs and individual quality in decathletes. Journal of Experimental Biology. DOI: 10.1242/jeb.123380. Walker, J.A. 2014. The effect of unmeasured confounders on the ability to estimate a true performance or selection gradient (and other partial regression coefficients). Evolution. DOI: 10.1111/evo.12406. Walker, J.A., Alfaro, M.E., Noble, M.M., and Fulton, C.J. 2013. Body fineness ratio as a predictor of maximum prolonged-swimming speed in coral reef fishes. PLOS One. 8: e75422. DOI: 10.1371/journal.pone.0075422.