Cox Lab
  • Cox Lab
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    • Lab members
    • Teacher fellows
    • Collaborators
  • Projects
    • Intralocus sexual conflict
    • Natural selection
    • Costs of reproduction
    • Sexual size dimorphism
    • Hormones & dimorphism
    • Evaporative water loss
    • Quantitative genetics
    • Gene expression
    • Sperm evolution
  • Publications
  • Other
    • Evolution Education
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Recent Publications

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Kustra et al. 2019 Oecologia
Density dependence of sperm phenotype

Reedy et al. 2019 Evolution
Sexual conflict and life-history evolution

Kahrl et al. 2019
. J Evol Biol
Evolution of sperm and testes in anoles

Request a copy of a publication
2019 and in press 

67. Kustra, M., A.F. Kahrl, A.M. Reedy, D.A. Warner, and R.M. Cox. 2019. Sperm morphology and count vary with fine-scale changes in local density across a wild lizard population. Oecologia (in press)

66. Reedy, A.M., W.J. Evans and R.M. Cox. 2019. Sexual dimorphism explains residual variance around the survival-reproduction tradeoff in lizards: Implications for sexual conflict over life-history evolution. Evolution (in press)

65. McGlothlin, J.W., R.M. Cox, and E.D. Brodie III. 2019. Sex-specific selection and the evolution of between-sex genetic covariance. Journal of Heredity 110: 422-432.

64. Kahrl, A.F., M.A. Johnson and R.M. Cox. 2019. Rapid evolution of testis size relative to sperm morphlogy suggests that post-copulatory selection targets sperm number in Anolis lizards. Journal of Evolutionary Biology 32: 302-309. Cover photo

2018 

63. Logan, M.L., J.D. Curlis, A.L. Gilbert, D.B. Miles, A.K. Chung, J.W. McGlothlin, and R.M. Cox. 2018. Thermal physiology and thermoregulatory behaviour exhibit low heritability despite genetic divergence between lizard populations. Proceedings of the Royal Society B 285: 20180697.

62. Neel, L.K., L.A. Durden, C.L., Cox, A.M. Reedy, and R.M. Cox. 2018. Anolis sagrei (Brown anole) and Leiocephalus carinatus (Curlytail lizard) ectoparasites. Herpetological Review 842

2017 

61. Kahrl, A.F., and R.M. Cox. 2017. Consistent differences in sperm morphology and testis size between native and introduced populations of three Anolis lizard species. Journal of Herpetology 51: 532-537.

60. Reedy, A.M., B. Pope, N. Kiriazis, C.L. Giordano, C.L. Sams, D.A. Warner, and R.M. 
Cox. 2017. Female anoles display less but attack more quickly than males in response to territorial intrusions. Behavioral Ecology 28: 1323-1328.

59. Cox, R.M., R.A. Costello, B. Camber, and J.W. McGlothlin. 2017. Multivariate genetic architecture of the Anolis dewlap reveals both shared and sex-specific features of a sexually dimorphic ornament. Journal of Evolutionary Biology 30: 1262-1275.

58. Cox, R.M., C.L. Cox, J.W. McGlothlin, D. Card, A. Andrew, and T.A. Castoe. 2017. Hormonally mediated increases in sex-biased gene expression accompany the breakdown of between-sex genetic correlations in a sexually dimorphic lizard. The American Naturalist 189: 315-332. Recommended on F1000

2016 

57. Ren, T., A.F. Kahrl, M. Wu and R.M. Cox. 2016. Does adaptive radiation of a host lineage promote ecological diversity of its bacterial communities? A test using gut microbiota of Anolis lizards. Molecular Ecology 25: 4793-4804.

56. Kahrl, A.F., C.L. Cox and R.M. Cox. 2016. Correlated evolution of targets of pre- and postcopulatory sexual selection in squamate reptiles. Ecology & Evolution 6: 6452-6459.

55. Cox, R.M., J.W. McGlothlin and F. Bonier. 2016. Homones as mediators of phenotypic and genetic integration: An evolutionary genetics approach. Integrative & Comparative Biology 56: 126-137.

54. Cox, R.M., J.W. McGlothlin and F. Bonier. 2016. Evolutionary Endocrinology: Hormones as mediators of evolutionary phenomena. Integrative & Comparative Biology 56: 121-125.

53. Cox, R.M. 2016. Sexually antagonistic selection. Encyclopedia of Personality and Individual Differences. Edited by V. Zeigler-Hill and T. Shackelford, Springer (in press)

52. Cox, R.M. 2016. Sexual size dimorphism. Encyclopedia of Evolutionary Psychological Science. Edited by T. Shackelford and V. Weekes-Shackelford, Springer (in press)

2015


51. Reedy, A.M., C.L. Cox, A.K. Chung, W.J. Evans, and R.M. Cox. 2015. Both sexes suffer increased parasitism and reduced energy storage as costs of reproduction in the brown anole, Anolis sagrei. Biological Journal of the Linnean Society 117: 516-527.

50. Calsbeek, R., M.C. Duryea, P. Bergeron, D. Goedert, and R.M. Cox. 2015. Intralocus sexual conflict, adaptive sex allocation, and the heritability of fitness. Journal of Evolutionary Biology 28: 1975-1985.

49. Cox, C.L., R.M. Peaden, and R.M. Cox. 2015. The metabolic cost of mounting an immune response in male brown anoles (Anolis sagrei). Journal of Experimental Zoology A 323A: 689-695. Cover photo

48. Cox, C.L., and R.M. Cox. 2015. Evolutionary shifts in habitat aridity predict evaporative water loss across squamate reptiles. Evolution 69: 2507-2516.

47. Kahrl, A.F., and R.M. Cox. 2015. Diet affects ejaculate traits in a lizard with condition-dependent fertilization success. Behavioral Ecology
26: 1501-1511.

46. Cox, C.L., A.F. Hanninen, A.M. Reedy, and R.M. Cox. 2015. Female anoles retain responsiveness to testosterone despite the evolution of androgen-mediated sexual dimorphism. Functional Ecology 29: 758-767.


45. Cox, R.M. 2015. Integrating costs of reproduction between the sexes. Chapter 10 in Integrative Organismal Biology, edited by L.B. Martin, H.A. Woods, and C. Ghalambor. Wiley Scientific.

44. Nash, J., J. Price, and R.M. Cox. 2015. Photoperiodic rhythm of hatching suggests circadian entrainment of Anolis sagrei eggs. Journal of Herpetology 49: 611-615.

2014

43.
Logan, M., R.M. Cox, and R. Calsbeek. 2014. Natural selection on thermal performance in a novel thermal environment. Proceedings of the National Academy of Sciences 111: 14165-14169.

42. Cox, R.M., and A.F. Kahrl. 2014. Sexual selection and sexual dimorphism. Chapter in: Reproductive Biology and Phylogeny of Lizards and Tuatara, edited by J. Rheubert, D. Seigel, S. Trauth and B. Jamieson. CRC Press.

41. Cox, R.M. and R. Calsbeek. 2014. Survival of the fattest? Indices of body condition do not predict viability in the brown anole (Anolis sagrei). Functional Ecology
29: 404-413.

40. Cox, R.M., M.B. Lovern and R. Calsbeek. 2014. Experimentally decoupling reproduction and energetics to test the functional basis of a life-history tradeoff. Journal of Animal Ecology 83: 888-898.

39. Calsbeek, R.M., M.C. Duryea, E. Parker, and R.M. Cox. 2014. Sex-biased juvenile dispersal is adaptive, but does not create genetic structure in island lizards. Behavioral Ecology 25: 1157-1163.
 
2013

38.
Cox, R.M. 2013. Reports: Odd couples: Extraordinary differences between the sexes in the animal kingdom. Review of book by Daphne Fairbairn. Reports of the National Center for Science Education 34: 5.1-5.3.

37. Duryea, M.C., A. Kern, R.M. Cox, and R. Calsbeek. 2013. A novel application of Approximate Bayesian Computation for detecting male reproductive advantages due to mating order. Behavioral Ecology and Sociobiology 67: 1867-1875.


36. Reedy, A.R., C.L. Cox, R. Calsbeek and R.M. Cox. 2013. Anolis sagrei (Brown Anole). Sexual cannibalism. Herpetological Review 44: 661-662.

2012

35.
Calsbeek, R., and R.M. Cox. 2012. An experimental test of the role of predators in maintaining a genetically based polymorphism. Journal of Evolutionary Biology 25: 2091-2101.


34. Carsia, R.V., P.J. McIlroy, R.M. Cox, M. Barrett, and H.B. John-Alder. 2012. Effects of food restriction on steroidogenesis of dispersed adrenal cells from Yarrow’s Spiny Lizard, Sceloporus jarrovii. General and Comparative Endocrinology 178: 306-313.

33. Urbach, D.U., R.M. Cox, and R. Calsbeek. 2012. Progeny sex ratios in a short-lived lizard: seasonal invariance despite apparent sex-specific effects of hatching date on fitness. Evolutionary Ecology 27: 205-220.

2011

32.
Cox, R.M., and R. Calsbeek. 2011. An experimental test for alternative reproductive strategies underlying a female-limited polymorphism. Journal of Evolutionary Biology 24: 343-353.

31. Cox, R.M., M.C. Duryea, M. Najarro and R. Calsbeek. 2011. Paternal condition drives sex-ratio bias in a lizard that lacks parental care. Evolution 65: 220-230.

2010

30. Cox, R.M., and R. Calsbeek. 2010. Cryptic sex-ratio bias provides indirect genetic benefits despite sexual conflict. Science 328: 92-94.

29. Cox, R.M., and R. Calsbeek. 2010. Sex-specific selection and intraspecific variation in sexual size dimorphism. Evolution 64: 798-809.

28. Cox, R.M., and R. Calsbeek. 2010. Severe costs of reproduction persist in Anolis lizards despite the evolution of a single-egg clutch. Evolution 64: 1321-1330.

27. Cox, R.M., E.U. Parker, D.M. Cheney, A.L. Liebl, L.B. Martin, and R. Calsbeek. 2010. Experimental evidence for physiological costs underlying the trade-off between reproduction and survival. Functional Ecology 24: 1262-1269. Recommended on F1000

26. Cox, R.M. 2010. Body size and sexual dimorphism. In: The Encyclopedia of Animal Behavior. Edited by M. Breed and J. Moore. Academic Press, Oxford.

25. Calsbeek, R., and R.M. Cox. 2010. Experimentally assessing the relative importance of competition and predation as agents of selection. Nature 465: 613-616. Recommended on F1000

24. Calsbeek, R., L.A. Bonvini and R.M. Cox. 2010. Geographic variation, frequency-dependent selection, and the maintenance of a female-limited polymorphism. Evolution 64: 116-124.

23. Connallon, T., R.M. Cox, and R. Calsbeek. 2010. Fitness consequences of sex-specific selection. Evolution 64: 1671-1682.

22. Gasc, A., M.C. Duryea, R.M. Cox, A. Kern and R. Calsbeek. 2010. Invasive predators deplete genetic diversity of island lizards. PLoS ONE 5: e12061.

2009

21.
Cox, R.M.,
and R. Calsbeek. 2009. Sexually antagonistic selection, sexual dimorphism and the resolution of intralocus sexual conflict. The American Naturalist 173: 176-187.

20. Cox, R.M., D.S. Stenquist, and R. Calsbeek. 2009. Testosterone, growth and the evolution of sexual size dimorphism. Journal of Evolutionary Biology 22: 1586-98. Cover photo

19. Cox, R.M., D.S. Stenquist, J.P. Henningsen, and R. Calsbeek. 2009. Manipulating testosterone to assess links between behavior, morphology and performance in the brown anole, Anolis sagrei. Physiological and Biochemical Zoology 82: 686-698.

18. John-Alder, H.B., R.M. Cox, G.J. Haenel, and L. Smith. 2009. Hormones, performance and fitness: natural history and endocrine experiments on a lizard (Sceloporus undulatus). Integrative and Comparative Biology 49: 393-407.

2008

17.
Cox, R.M.
, V. Zilberman, and H.B. John-Alder. 2008. Testosterone stimulates the expression of a social color signal in Yarrow’s spiny lizard, Sceloporus jarrovii. Journal of Experimental Zoology 309A: 505-514.

16. Cox, R.M., M.M. Barrett, and H.B. John-Alder. 2008. Effects of food restriction on growth, energy allocation and sexual size dimorphism in Yarrow’s spiny lizard, Sceloporus jarrovii. Canadian Journal of Zoology 86: 268-276.

15. Cox, R.M., A. Muñoz-Garcia, M.S. Jurkowitz, and J.B. Williams. 2008. β-Gluco-cerebrosidase activity in stratum corneum of house sparrows following acclimation to high and low humidity. Physiological and Biochemical Zoology 81:97-105

14. Muñoz-Garcia, A., R.M. Cox, and J.B. Williams. 2008. Changes in cutaneous water loss and skin lipids of house sparrows (Passer domesticus) following acclimation to high or low humidity. Physiological and Biochemical Zoology 81: 87-96.

13. Carsia, R.V., P.J. McIlroy, R.M. Cox, M. Barrett, and H.B. John-Alder. 2008. Gonadal modulation of in vitro steroidogenic properties of dispersed adrenocortical cells from Sceloporus lizards. General and Comparative Endocrinology 158: 202-210. 

12. Carsia, R.V., P.J. McIlroy, R.M. Cox, M.M. Barrett, and H.B. John-Alder. 2008. Adrenal steroidogenesis in reptiles: insights from dispersed adrenocortical cells from Sceloporus lizards. Pp. 57-88 in Recent Advances in Non-Mammalian Adrenal Gland Research. Edited by A. Capaldo. Research Signpost.

2007

11. Cox, R.M.,
and H.B. John-Alder. 2007. Increased mite parasitism as a cost of testosterone in male striped plateau lizards, Sceloporus virgatus. Functional Ecology 21:327-334. 

10. Cox, R.M., and H.B. John-Alder. 2007. Growing apart together: the development of contrasting sexual size dimorphisms in sympatric lizards. Herpetologica 63: 245-257.

9. Cox, R.M., M.A. Butler, and H.B. John-Alder. 2007. The evolution of sexual size dimorphism in reptiles. Pp. 38-49 in Sex, Size and Gender Roles: Evolutionary Studies of Sexual Size Dimorphism. Edited by D.J. Fairbairn, T. Szekely, and W.U. Blanckenhorn. Oxford University Press. 

8. John-Alder, H.B., and R.M. Cox. 2007. Development of sexual size dimorphism in lizards: testosterone as a bipotential growth regulator. Pp. 195-204 in: Sex, Size and Gender Roles: Evolutionary Studies of Sexual Size Dimorphism. Edited by D.J. Fairbairn, T. Szekely, and W.U. Blanckenhorn. Oxford University Press.

7. John-Alder, H.B., R.M. Cox, and E.N. Taylor. 2007. Proximate developmental mediators of sexual dimorphism in size: case studies from squamate reptiles. Integrative and Comparative Biology 47: 258-271.

2006

6.
Cox, R.M.
2006. A test of the reproductive cost hypothesis for sexual size dimorphism in Yarrow’s spiny lizard, Sceloporus jarrovii. Journal of Animal Ecology 75: 1361-69.

5. Cox, R.M., V. Zilberman, and H.B. John-Alder. 2006. Environmental sensitivity of sexual size dimorphism: Laboratory common garden removes effects of sex and castration on lizard growth. Functional Ecology 20: 880-888.                                 

2005

4.
Cox, R.M., and H.B. John-Alder. 2005. Testosterone has opposite effects on male growth in lizards (Sceloporus spp.) with opposite patterns of sexual size dimorphism. Journal of Experimental Biology 208: 4679-4687.

3. Cox, R.M., S.L. Skelly, A. Leo, and H.B. John-Alder. 2005. Testosterone regulates sexually dimorphic coloration in the eastern fence lizard, Sceloporus undulatus. Copeia 2005: 597-608.

2. Cox, R.M., S.L. Skelly, and H.B. John-Alder. 2005. Testosterone inhibits growth in juvenile male eastern fence lizards (Sceloporus undulatus): Implications for energy allocation and sexual dimorphism. Physiological & Biochemical Zoology 78: 531-545.

2003

1. Cox, R.M.
, S.L. Skelly, and H.B. John-Alder. 2003. A comparative test of adaptive hypotheses for sexual size dimorphism in lizards. Evolution 57: 1653-1669.
Picture

Cox Lab

Department of Biology
University of Virginia
PO Box 400328
485 McCormick Rd.
Charlottesville, VA 22904