Nature
Protocols, 4(8), 1184–1191. https://doi.org/10.1038/nprot.2009.97
Emlen, D. J., Warren, I. A., Johns, A., Dworkin, I., & Lavine, L. C. (2012). A mechanism of
extreme growth and reliable signaling in sexually selected ornaments and weapons. Science, 337(6096), 860–864. https://doi.org/10.1126/science.1224286
Enstrom, D. A., Ketterson, E. D., & Val Nolan, J. R. (1997). Testosterone and mate choice in
the dark-eyed junco. Animal Behaviour, 54(5), 1135–1146. https://doi.org/10.1006/anbe.1997.0555
Fisher, R. A. (1915). The evolution of sexual preference. The Eugenics Review , 7(3), 184–192.
Grafen, A. (1990). Biological signals as handicaps. Journal of Theoretical Biology , 144(4), 517–
546. https://doi.org/10.1016/S0022-5193(05)80088-8
Harrison, P. W., Wright, A. E., Zimmer, F., Dean, R., Montgomery, S. H., Pointer, M. A., &
Mank, J. E. (2015). Sexual selection drives evolution and rapid turnover of male gene
expression. Proceedings of the National Academy of Sciences of the United States of America, 112(14), 4393–4398.https://doi.org/10.1073/pnas.1501339112
Hau, M., Wikelski, M., Soma, K. K., & Wingfield, J. C. (2000). Testosterone and year-round
territorial aggression in a tropical bird. General and Comparative Endocrinology , 117(1),
20–33. https://doi:10.1006/gcen.1999.7390
Hau, M., & Wingfield, J. C. (2011). Hormonally-regulated trade-offs: evolutionary variability
and phenotypic plasticity in testosterone signaling pathways. In