Professor & Graduate Program Coordinator
BSC 414/L/514/L Ichthyology
BSC 441/L541/L Population and Community Ecology
BSC 452/552 Environmental Physiology
BSC 747 Multivariate Applications in Ecology
My research focuses on the ecology and evolution of fishes. Research in my lab is conducted on a variety of organizational levels from the physiology of individuals to community dynamics over large spatial and temporal scales. Some of the recently completed projects included studies on phenotypic plasticity of physiological traits, mechanisms of reproductive isolation, hybrid zone dynamics, and assessing the dynamics of fish communities over time. Ongoing research projects being conducted by graduate students in the lab include ecological drivers of fish movement, evolution of life history traits, isolation of obligate headwater species, and thermal biology of stream fishes. Click here for more detailed information on research in my lab.
I am also curator of the USM Museum of Ichthyology. The collection is an invaluable resource for students and researchers interested in ichthyology. As of July 2015, the museum contains over 47,000 lots 1,000,000 specimens representing approximately 870 taxa.
Matamoros, W., C. Hoagstrom, J. Schaefer and B. Kreiser. 2015. Fish faunal provinces of the conterminous USA reflect Quaternary connections exemplified by distributions of primary freshwater fishes. Biological Reviews Doi: 10.1111/brv.12196.
Michaelsen, S., J. Schaefer and M. Peterson. 2015. Fluctuating asymmetry in Menidia beryllina exposed to oil from the Deepwater-Horizon spill. PLoSOne Doi: 10.1371/journal.pone.0118742
Matamoros, W. C. McMahon, P. Chakrabarty, A. James, and J. Schaefer. 2014. Derivation of the Freshwater Fish Fauna of Central America Revisited: Myers’s hypothesis in the 21st Century. Cladistics. Doi: 10.1111/cla.12081
Earnest, K., J. Scott, J. Schaefer and D. Duvernell. 2014. The landscape genetics of syntopic topminnows (Fundulus notatus and F. olivaceus) in a riverine contact zone. Ecology of Freshwater Fish 23(4): 572-580.
Franssen, N., Stewart, L. and J. Schaefer. 2013. Morphological divergence and flow-induced phenotypic plasticity in fish fromanthropogenically altered stream habitats. Ecology and Evolution 3:4648-4657.
Duvernell, D.D., S. Meier, J. Schaefer, and B.R. Kreiser. 2013. Contrasting phylogeographic histories between broadly sympatric topminnows in the Fundulus notatus species complex. Molecular Phylogenetics and Evolution 69: 653-663.
Duvernell, and J. Schaefer. 2013. Variation in contact zone dynamics between two species of topminnows, Fundulus notatus and F. olivaceus, across isolated drainage systems, Evolutionary Ecology. doi 10.1007/s10682-013-9653-z
Franssen, N.R., J. Harris, S.R. Clark, J.F. Schaefer and L. K. Stewart. 2013. Shared and unique morphological responses of stream fishes to anthropogenic habitat alteration. Proceedings of the Royal Society 280:20122715.