Research Interests

Current projects:
1) Characterization of Oregon coastal coho salmon populations with putatively neutral microsatellites: data used to guide inferences of genetic structure and migration rates among populations

2) An analysis of the molecular evolution of olfactory receptor genes within and among salmonid species

3) Characterization of Oregon coastal coho salmon populations, from ecologically distinct stream systems, through olfactory receptor gene-linked markers.  Population genomics approach used to test for directional selection over loci.

General interests:
Population genomics, olfactory receptor genes, salmonid evolution, homing and straying behaviors, molecular evolution, neutral theory

Publications

Johnson, M.A., Banks M.A. In preparation. Interlocus variance of F_ST provides evidence for selection over an olfactory receptor gene in coho salmon (Oncorhychus kisutch) populations

Johnson, M.A., and M. A. Banks. In Review. Positive Darwinian selection operating on paralogous main olfactory receptors and an ora1 gene in salmonid fishes

Johnson, M.A., and M. A. Banks. 2008. Genetic structure, migration and patterns of allelic richness among coho salmon (Oncorhynchus kisutch) populations of the Oregon Coast. Canadian Journal of Fisheries and Aquatic Science 75(7): 1274-1285 PDF

Johnson M. A., Marinho-Filho, J. S., Tomas, W. M. (2004) Species-habitat association of the spiny rat, Proechimys roberti (Rodentia: Echimyidae), in the National Park of Brasília, DF, Brazil. Studies on Neotropical Fauna and Environment 39 (2):103-108 PDF

Johnson M. A., Saraiva P, Coelho D (1999): The role of gallery forests in the distribution of Cerrado mammals. Revista Brasileira de Biologia (Brazilian Journal of Biology) 59(3):421-427 PDF

Johnson M.A., Tomas W.M. & Guedes N.M.R (1997) Density of young manduvi (Sterculia apetala), the hyacinth macaw's nesting tree, under three different management conditions in the Pantanal wetland, Brazil. Ararajuba 5(2)185-188 PDF

Education

Ph.D - 2003 to Present
Oregon State University, HMSC, Newport, OR
Advisor: Michael A. Banks

MSc - 1997 to 1999
University of Brasilia, Brasilia, DF, Brazil
Advisor: Jader Soares Marinho-Filho

BSc - 1990-1996
Oregon State University, Corvallis, OR