John Steffen, Ph.D.
Affiliations: | School of Science | Penn State Erie The Behrend College |
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"John Steffen"
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| Steffen JE, Hultberg J, Drozda S. (2018) The effect of dietary carotenoid increase on painted turtle spot and stripe color. Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology. 229: 10-17 |
| Steffen JE, Learn KM, Drumheller JS, et al. (2015) Carotenoid composition of colorful body stripes and patches in the painted turtle (Chrysemys picta) and red-eared slider (Trachemys scripta) Chelonian Conservation and Biology. 14: 56-63 |
| Steffen JE, Guyer CC. (2014) Display behaviour and dewlap colour as predictors of contest success in brown anoles Biological Journal of the Linnean Society. 111: 646-655 |
| Alfonso YU, Morris HJ, Gutiérrez A, et al. (2013) Dewlap color variation based on pterin and carotenoid pigments in three subspecies of anolis jubar of the Cuban Southern Coast Copeia. 201-205 |
| Steffen JE, Hill GE, Guyer C. (2010) Carotenoid Access, Nutritional Stress, and the Dewlap Color of Male Brown Anoles Copeia. 2010: 239-246 |
| Steffen JE, McGraw KJ. (2007) Contributions of pterin and carotenoid pigments to dewlap coloration in two anole species. Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology. 146: 42-6 |