Articles Published in Refereed Journals
Steffen, J.E., Learn, K.M., Drumheller, J.S., Boback, S.M. and McGraw, K.J. Carotenoid composition of colorful body stripes and patches in the painted turtle (Chrysemys picta) and red-eared slider (Trachemys scripta). 14(1): 56-63.
Steffen, J.E. and C. Guyer. Display behaviour and dewlap colour as predictors of contest success in brown anoles. Biological Journal of the Linnean Society, 111: 646–655, 2014.
Alfonso, Y.U., Morris, H.J., Gutierrez, A., Rodriguez-Schettino, Denis, D. and J.E. Steffen. Dewlap color variation based on pterin and carotenoid pigments in three subspecies of Anolis jubar of the Cuban southern coast. Copeia, 2013:205-209, 2013.
Peterson, J.D., Steffen, J.E., Reinert, L.K., Cobine, P.A., Appel, A., Rollins-Smith, L. Host stress response is important for the pathogenesis of the deadly amphibian disease, Chytridiomycosis, in Litoria caerulea. PLOS One 8(4):e62146, 2013.
Steffen, J.E. Book Review: The Optics of Life: A Biologist’s Guide to Light in Nature, by Sonke Johnsen. Integrative and Comparative Biology, 52(2): 331, 2012.
Steffen, J.E. and A.G.Appel. The effect of temperature on standard metabolic rate (SMR) of male and female Brown Anoles. Amphibia-Reptilia, 33(2):297-302, 2012.
Steffen, J.E. Perch height differences among female Anolis polylepis exhibiting dorsal pattern polymorphism. Reptile and Amphibian Conservation and Natural History, 17(3):172-174., 2010.
Steffen, J.E., Hill, G.E., and C.G. Guyer. Carotenoid access, nutritional stress and dewlap color of male Brown Anoles. Copeia, 2010(2):239-246, 2010.
Steffen, J.E. Assessment of allometry for sexual size dimorphism in Norops lizards. South American Journal of Herpetology, 4(3):245-252, 2009.
Steffen, J.E. and K.J. McGraw. Dewlap size and coloration in relation to sex and pigment content in the Brown Anole, Norops sagrei. Comparative Biochemistry and Physiology, Part B, 154:334-340, 2009.
Liu,M., Siefferman, L., Mays, Jr. H., Steffen, J.E., and G.E.Hill. 2009. A field test of female mate preference for male plumage coloration in eastern bluebirds. Animal Behaviour, 77(8): 1707-1720, 2009.
Steffen, J.E. Perch-height specific predation on tropical lizard clay models: implications for habitat selection in mainland Neotropical lizards. International Journal of Tropical Biology, 57(3):859-864, 2008.
Amsberry, L.K. and J.E. Steffen. Do colorful unripe fruits of the neotropical tree, Ardisia nigropunctatus, attract avian seed dispersers? Biotropica, 40(5):575-580, 2008.
Steffen, J.E. and K.J. McGraw. Contributions of pterin and carotenoid pigments to dewlap coloration in two anole species. Comparative Biochemistry and Physiology, Part B, 146: 42-46, 2007.
Steffen, J.E. and R.A.Anderson. Abundance of the Long-Nose Leopard Lizard, Gambelia wislizenii correlates inversely with shrub cover and sagebrush abundance in southeast Oregon. American Midland Naturalist, 156: 201-207, 2006.
Steffen, J. E. (2014). The influence of light on visual discrimination of sexually dichromatic dewlap color in male and female Brown Anoles. Lizards: Thermal Ecology, Genetic Diversity and Functional Role in Ecosystems. M. P. Kiernan. Hauppauge, NY, Nova Scientific Publishers, Inc.: 1-28.