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All Publications in Refereed Journals:

Underlined Name = graduate student when research was conducted

Italicized Name = undergraduate student when research was conducted


89 Bertram, S.M., Dakin, R., Harrison, S.J., Tremblay, D.T., Reifer, M.L., Kolluru, G.R. 2022. Acoustic signalling performance: Variation in vigour at multiple scales. Animal Behaviour 184: 157-171.


88 Bertram, S.M., Yaremchuck, D.D., Reifer, M.L., Villarreal, A., Muzzatti, M.J., Kolluru, G.R. 2021. Tests of the positive and functional allometry hypothesis for sexually selected traits in the Jamaican field cricket. Behavioural Processes 188: 104413.


87 Bulté, G., Léveillée, M.B., Blouin-Demers, G., Cooke, S.J., and Bertram, S.M. 2020. Observations on the short-term effects of motorboat disturbance on the use of basking sites by female northern map turtles. Chelonian Conservation and Biology 19(2): 302-304.

86 Hughes, M, Bertram, S.M., Young, A.M., Merry, J.W., Kolluru, G.R., Dunlap, A.S., Danielson-Francois, A., Weiss, S. 2020. Teaching animal behavior online: A primer for the pandemic and beyond. Ethology 127(1): 14-31.

85 Morehouse, N.I.*, Raubenheimer, D., Kay, A., Bertram, S.M.*. 2020. Integrating nutritional and behavioral ecology: mutual benefits and new frontiers. Volume 52 of Advances in the Study of Behavior (, Zuk M and Naguib M (handling editors). Submitted November 2019, Accepted January 27 2020 * these authors contributed equally


84 Xie, J., Bertram, S.M. 2019 Using machine learning techniques to classify cricket sound. 2019. Proc. SPIE 11384, Eleventh International Conference on Signal Processing Systems, 113840K

83 Wojan, E.M., Carreiro, N.C., Clendenen, D.A., Neldner, H., Castillo, C., Bertram, S.M., Kolluru, G.R. 2019. The effects of commonly used anaesthetics on colour measurements across body regions in the poeciliid fish, Girardinus metallicus. Journal of Fish Biology Published September 13, 2019

82 Doria, M.D., Morand-Ferron, J., Bertram, S.M. 2019. Spatial cognitive performance is linked to thigmotaxis in field crickets. Animal Behaviour 150:15-25.


81 Villarreal, A.E., Godin, J-G.J., Bertram, S.M. 2018. Influence of the operational sex ratio on mutual mate choice in the Jamaican field cricket (Gryllus assimilis). Ethology 124:816-828.

80 Wojan, E., Bertram, S.M., Clendenen, D., Castillo, C., Neldner, H., Kolluru, G.R. 2018. Sexual selection on the multicomponent display of black morph male Girardinus metallicus (Pisces: Poeciliidae). Behavioural Processes 153:1-8 (

79 Reifer, M.L., Harrison, S.J., Bertram, S.M. 2018. How dietary protein and carbohydrate influence field cricket development, size, and mate attraction signalling. Animal Behaviour 139:137-146.


78 Harrison, S.J., J.-G., J. Godin, S.M. Bertram. 2017. Influence of dietary nutrient ratio on aggression and signalling in male field crickets. Animal Behaviour 134:123-134

77 Bertram, S.M., M.J. Loranger, I.R. Thomson, S.J. Harrison, G.L. Ferguson, M.L. Reifer, D.H. Corlett, and P.A. Gowaty. 2017. Choosy males in Jamaican field crickets. Animal Behaviour 133:101-108.

76 Bertram, S.M., M.J. Loranger, I.R. Thomson, S.J. Harrison, G.L. Ferguson, M.L. Reifer, D.H. Corlett, and P.A. Gowaty. 2017. What is driving male mate preference evolution in Jamaican field crickets. Ethology 123(11):793-799


75 McAuley, E.M. and S.M. Bertram. 2016. Field crickets compensate for unattractive static long-distance call components by dynamic signalling effort. PLoS ONE 11(12):e0167311. doi:10.1371/journal.pone.0167311

74 Bertram, S.M.*, C. Healy, J. Hogge, Z. Kritikos, J. Pipitone, and G.R. Kolluru*. 2016. A boldness-aggression syndrome in subordinate but not dominant males of a poeciliid fish. Behaviour 153:1489-1507 DOI: 10.1163/1568539X-00003392 * these authors contributed equally

73 Loranger, M.J. and S.M. Bertram. 2016. The effect of sire dominance and aggression on fitness measures in a field cricket (Gryllus assimilis). Animal Behaviour 119:135-142

72 Bertram, S.M., M.J. Loranger, I.R. Thomson, S.J. Harrison, G.L. Ferguson, M.L. Reifer, D.H. Corlett, and P.A. Gowaty. 2016. Linking mating preferences to sexually selected traits and offspring viability: good versus complementary genes hypotheses. Animal Behaviour 119:75-86.

71 Gorelick, R., M. Mansfield, D. Fraser, J.W. Dawson, S. Wijenayake and S.M. Bertram. 2016. Abrupt shortening of bird W chromosomes in ancestral Neognathae. Biological Journal of the Linnean Society 119:488-496 DOI: 10.1111/bij.12832

70 Boutin, S.R.T., S.J. Harrison, L.P. Fitzsimmons, E.M. McAuley and S.M. Bertram. 2016. Same-sex sexual behaviour in crickets: Understanding the paradox. Animal Behavior. Accepted December 22 2015; Published February 25 2015;

69 Loranger, M. and S.M. Bertram. 2016. The effect of male dominance on female choice in a field cricket (Gryllus assimilis). Animal Behavior. Accepted December 22 2015; Published February 17 2016;


68 Montroy, K., M.J. Loranger, and S.M. Bertram. 2015. Male crickets adjust their aggressive behaviour when a female is present. Behavioural Processes 124:108-114 Accepted November 3 2015; Published December 17 2015;

67 Kolluru, G.R.*, C. Castillo, M. Hendrickson, M. Hughes, P. Krause, K. LePiane, C. McCann, E. Pavia, C. Porter, R. Rodriguez, T. Rodriguez-Cabrera, E. Scott, M. Willrodt, S.M. Bertram*. 2015. Sexual selection in black morph Girardinus metallicus (Pisces: Poeciliidae): females can spot a winner (but we cannot). Ethology 121:12:1212-1224; doi:10.1111/eth.12434 Published November 10 2015 * these authors contributed equally and lead authorship was determined by a coin toss


66 Harrison,S.J., D. Raubenheimer, S.J. Simpson, J-G.J. Godin, and S.M. Bertram. 2014. Towards a synthesis of frameworks in nutritional ecology: interacting effects of proteins, carbohydrates and phosphorus on field cricket fitness. Proceedings of the Royal Society of London Series B 281:1792:20140539 Published August 20 2014

65 Pacheco, K. and S.M. Bertram. 2014. How male sound pressure level influences phonotaxis in virgin female Jamaican field crickets (Gryllus assimilis). PeerJ 2:e437 Published June 10 2014

64 Kolluru G.R., S.M. Bertram, E.H. Chin, C.V. Dunmeyer, and J.S. Graves. 2014. Mating behaviour and its morphological correlates in two color morphs of Girardinus metallicus (Pisces: Poeciliidae), a species previously thought not to exhibit courtship display. Behavioural Processes 106:44-52 doi: 10.1016/j.beproc.2014.04.007 Published April 26 2014 * these authors contributed equally and lead authorship was determined by a coin toss

63 Thomson, I.R. C.-A. Darveau, and S.M. Bertram. 2014. Body morphology, energy stores, and muscle enzyme activity explain cricket acoustic mate attraction signalling variation. PLOS ONE 9:3:e90409 doi: 10.1371/journal.pone.0090409 Published March 7 2014

62 Thomson, I.R., and S.M. Bertram. 2014. Spring field crickets (Gryllus veletis) use two different pulse types when signaling to attract mates. Journal of Insect Behavior 27:2:217-227 doi:10.1007/s10905-013-9421-5 Published March 2014


61 Fitzsimmons, L.P., and S.M. Bertram. 2013. Playing to an audience: the social environment influences aggression and victory displays. Biology Letters 9:4: 20130449 doi:10.1098/rsbl.2013.0449 Published August 23 2013

60 Pacheco, K., J.W. Dawson, M. Jutting, and S.M. Bertram. 2013. How age influences phonotaxis in virgin female Jamaican field crickets (Gryllus assimilis). PeerJ 1:e130; doi:10.7717/peerj.130 Published August 8 2013

59 Bertram, S.M. I.R. Thomson, S.J. Harrison, G.L. Ferguson, and L.P. Fitzsimmons. 2013. Adaptive plasticity in wild field cricket’s acoustic signaling. PLOS ONE 8(7): e69247. doi:10.1371/journal.pone.0069247 Published July 23 2013

58 Bertram, S.M., and M. Katti. 2013. The social biology professor: effective strategies for social media engagement. Ideas in Ecology and Evolution 6:22-31 doi:10.4033/iee.2013.6.5.f Published June 2013

57 Fitzsimmons, L.P., and S.M. Bertram. 2013. No relationship between long-distance acoustic mate attraction signals and male fertility or female preference in spring field crickets. Behavioral Ecology and Sociobiology 67(6):885-893. doi:10.1007/s00265-013-1511-z Published June 2013

56 Harrison, S.J., I.R. Thomson, C.M. Grant, and S.M. Bertram. 2013. Calling, courtship, and condition in the fall field cricket, Gryllus pennsylvanicus. PLOS ONE 8(3):e60356. doi:10.1371/journal.pone.0060356 Published March 20 2013

55 Fitzsimmons, L.P., and S.M. Bertram. 2013. Signaling effort does not predict aggressiveness in male spring field crickets. Behavioral Ecology and Sociobiology 67(2):213-220 doi:10.1007/s00265-012-1441-1 Published February 2013


54 Bertram, S.M. and V.L.M. Rook. 2012. Relationship between condition, aggression, signaling, courtship and egg laying in the field cricket, Gryllus assimilis. Ethology 118(4):360-372 doi:10.1111/j.1439-0310.2011.02019.x Published April 2012

53 Thomson, I.R., C.M. Vincent, and S.M. Bertram. 2012. Success of the parasitoid fly Ormia ochracea (Diptera: Tachinidae) on natural and unnatural cricket hosts. Florida Entomologist 95(1):43-48 doi:10.1653/024.095.0108 Published March 2012

52 Bertram, S.M., L.P. Fitzsimmons, E.M. McAuley, H.D. Rundle, and Gorelick, R. 2012. Phenotypic covariance structure and its divergence for acoustic mate attraction signals among four cricket species. Ecology and Evolution 2(1):181-195 doi:10.1002/ece3.76 Published January 2012


51 Bertram, S.M., I.R. Thomson, B. Auguste, J.W. Dawson and C.-A. Darveau. 2011. Variation in cricket acoustic mate attraction signaling explained by body morphology and metabolic differences. Animal Behaviour 82(6):1255-1261 doi:10.1016/j.anbehav.2011.08.021 Published December 2011

50 Bertram, S.M., V.L.M. Rook, J.M. Fitzsimmons, and L.P. Fitzsimmons. 2011. Fine- and broad-scale approaches to understanding the evolution of aggression in crickets. Ethology 117(2011):1067-1080 doi: 10.1111/j.1439-0310.2011.01970.x Published November 2011

49 Bertram, S.M. and V.L.M. Rook. 2011. Jamaican field cricket mate attraction signals provide age cues. Ethology 117(11):1050-1055 doi: 10.1111/j.1439-0310.2011.01958.x Published November 2011

48 Bertram, S.M., J. Nelson, and L. Visanuvimol. 2011. Early identification and intervention influences the success of first-year at-risk science, mathematics and engineering students. Proceedings of the 7th Annual National Symposium on Student Retention Published November 2011

47 Fitzsimmons, L.P. and S.M. Bertram. 2011. The calling songs of male spring field crickets (Gryllus veletis) change as males age. Behavior 148(9):1045-1065 doi:org/10/1163/000579511X588812 Published November 2011

46 Gorelick, R., L.J. Derraugh, J. Carpinone, and S.M. Bertram.2011. Pre-karyogamic sexual selection: mate choice inside an egg cell. Ideas in Ecology and Evolution October 4:14-23 doi:10.4033/iee.2011.4.3.n Published October 2011

45 Visanuvimol, L. and S.M. Bertram. 2011. How dietary phosphorus availability during development influences cricket condition and life history traits of the cricket, Acheta domesticus. Journal of Insect Science 11:e63:1-17 Published May 2011

44 Klaus, S.P., L.P. Fitzsimmons, T.E. Pitcher, and S.M. Bertram. 2011. Song and sperm in crickets: A trade-off between pre- and post-copulatory traits or phenotype-linked fertility? Ethology 117(2):154-162 Published February 2011

43 Whattam, E.M., and S.M. Bertram. 2011. Effects of juvenile and adult condition on long-distance call components in the Jamaican field cricket Gryllus assimilis. Animal Behaviour January 81(1):135-144 Published January 2011


42 Bertram, S.M., V.L.M. Rook, and L.P. Fitzsimmons. 2010. Strutting their stuff: victory displays in the spring field cricket, Gryllus veletis. Behaviour 147(10):1249-1266 Published September 2010

38 Vincent, C.M., and S.M. Bertram. 2010. Reproductive compensation: a review of the Gryllus spp. – Ormia ochracea host-parasitoid system. Journal of Insect Behaviour 23(5):340-347. Published September 2010.

41 Gorelick, R, and S.M. Bertram. 2010. Multi-way multi-group segregation and diversity indices. PLoS ONE 5(6): e10912. doi:10.1371/journal.pone.0010912 Published June 1 2010

39 Visanuvimol, L. and S.M. Bertram. 2010. Dietary phosphorus availability influences female cricket lifetime reproductive effort. Ecological Entomology 35(3):386-395. Published June 2010

40 Wilson, A.D.M., E.M. Whattam, R. Bennett, L. Visanuvimol, C. Lauzon, and S.M. Bertram. 2010. Behavioral correlations across activity, mating, exploration, aggression, and antipredator contexts in the European house cricket. Behavioural Ecology and Sociobiology 64(5):703-715 DOI 10.1007/s00265-009-0888-1 Published December 19 2009

37 Vincent, C.M., and S.M. Bertram. 2010. Crickets groom to avoid lethal parasitoids. Animal Behaviour 79:51-56. doi:10.1016/j.anbehav.2009.10.001 Published November 4 2009


36 Vincent, C.M. and S.M. Bertram. 2009. The parasitoid fly Ormia ochracea (Diptera: Tachinidae) can use juvenile crickets as hosts. Florida Entomologist 92(4):598-600.

35 Vincent, C.M. and S.M. Bertram. 2009. Collection and laboratory culture of Ormia ochracea (Diptera: Tachinidae). Journal of Entomological Science 41(1): 1-7.

34 Bertram, S.M., E.M. Whattam, L. Visanuvimol, R. Bennett, and C. Lauzon. 2009. Phosphorus availability influences cricket mate attraction displays. Animal Behaviour 77(2):525-530.

33 Bertram, S.M. and R. Gorelick. 2009. Quantifying and comparing mating systems using normalized mutual entropy. Animal Behaviour 77(1):201-206.

32 Holbrook, C.T., R.M. Clark, R. Jeanson, S.M. Bertram, P.F. Kukuk, and J.H. Fewell.. Emergence and consequences of division of labor in associations of the solitary sweat bee Lasioglossum (Ctenonomia) NDA-1 (Hymenoptera: Halictidae). Ethology 115(4):301-310.

31 Gorelick, R., S.M. Bertram. 2009. Swimming eastern chipmunks (Tamias striatus) and hairy-tailed mole (Parascalops breweri) in Kawartha Highlands Provincial Park, Ontario. Canadian Field Naturalist 122(1):73-75.


30 Jeanson, R., R.M. Clark, C.T. Holbrook, S.M. Bertram, J.H. Fewell, P.F. Kukuk. 2008. Division of labour and socially-induced changes in response thresholds in associations of solitary halictine bees. Animal Behaviour 76:593-602.

29 Bertram, S.M., M. Bowen, M. Kyle, and J. Schade. Extensive natural intraspecific variation in stoichiometric (C:N:P) composition in two terrestrial insect species. Journal of Insect Science 8(26):1-7.


28 Bertram, S.M., D.J. Kemp, J.S. Johnson, S.X. Orozco, and R. Gorelick. 2007. Heritability of acoustic signalling time in the Texas field cricket, Gryllus texensis. Evolutionary Ecology Research 9(6):975-986.

27 Jeanson, R., J.H. Fewell, R. Gorelick, and S.M. Bertram. 2007. Emergence of increased division of labor as a function of group size. Behavioural Ecology and Sociobiology 62(2):289-298.

26 Bertram, S.M. 2007. Positive relationship between signalling time and flight capability in the Texas field cricket, Gryllus texensis. Ethology 113(9):875-880.

25 Gorelick, R. and S.M. Bertram. 2007. Quantifying division of labor: borrowing tools from sociology, sociobiology, information theory, landscape ecology, and biogeography. Insectes Sociaux 54(2):105-112.


24 Bertram, S.M., J. Schade, J.J. Elser. 2006. Signalling and phosphorus: correlations between mate signalling effort and body elemental composition in crickets. Animal Behaviour 72(4):899-907.

23 Bertram, S.M., and M. Bowen. 2006. Field cricket species differences in the temporal patterns of long-distance mate attraction signals. Ethology 112(9):850-857.


22 Bertram, S.M. and P. Warren. 2005. Tradeoffs in signalling components differ with signalling effort. Animal Behaviour 70(3):477-484.


21 Bertram, S.M., S.X. Orozco, and R. Bellani. 2004. Temporal shifts in conspicuousness: mate attraction displays of the Texas field cricket, Gryllus texensis. Ethology 110(12):963-975.

20 Orozco, S.X. and S.M. Bertram. 2004. Parasitized male crickets exhibit reduced trilling bout rates and durations. Ethology 110(11):909-917.

19 Gorelick, R., S.M. Bertram, P.R. Killeen., and J.H. Fewell. 2004. Normalized mutual entropy in biology: Quantifying division of labour. American Naturalist 164(5):677-682.

18 Bertram, S.M., L.A. Johnson, J. Clark, and C. Chief. 2004. An electronic acoustic recorder for quantifying total signaling time, duration, rate and magnitude in acoustically signaling insects. Technical Acoustics 2004(20): 1-15.


17 Bertram, S.M., R. Gorelick, and J.H. Fewell. 2003. Colony response to graded resource changes: an analytical model of the influence of genotype, environment, and dominance. Theoretical Population Biology 64(2):151-162.

16 Gorelick, R. and Bertram, S.M. 2003. Maintaining heritable variation via sex-limited temporally fluctuating selection: a phenotypic model accommodating non-Mendelian epigenetic effects. Theory in Biosciences 122(4):321-338.


15 Bertram, S.M. 2002. Temporally fluctuating selection of sex-limited signaling traits in the Texas Field cricket, Gryllus texensis. Evolution 56(9):1831-1839.

14 Fewell, J.H. and S.M. Bertram. 2002. Evidence for genetic variation in worker task performance by African and European honey bees. Behavioral Ecology and Sociobiology 52(4):318-325.

13 Bertram, S.M. and R. Bellani. 2002. Influence of photoperiod on temporal mate signaling patterns in the Texas field cricket, Gryllus texensis. Journal of Insect Behavior 15(4):607-615.

12 Bertram, S.M. 2002. The influence of rearing and monitoring environment on temporal mate signaling patterns in the field cricket, Gryllus texensis. Journal of Insect Behavior 15(1):127-137.

2000 and Earlier

11 Bertram, S.M. 2000. The influence of age and size on temporal mate signaling behaviour. Animal Behaviour 60(3):333-339.

10 Fewell, J.H. and S.M. Bertram. 1999. Division of labor in a dynamic environment: response by honeybees (Apis mellifera) to graded changes in colony pollen stores. Behavioral Ecology and Sociobiology 46(3):171-179.

09 Bertram, S.M. and L. Johnson. 1998. An electronic technique for monitoring the temporal aspects of acoustic signals of captive organisms. BioAcoustics 9: 107-118.

08 Bertram, S.M. and M. Berrill. 1996. Population fluctuations in a northern population of gray treefrogs (Hyla versicolor). In: Amphibians in Decline. Ed. D. Green. Herpetological Conservation 1: 57-63.

07 Berrill, M., S.M. Bertram, and B. Pauli. 1996. Effects of pesticides on amphibian embryos and tadpoles. In: Amphibians in Decline. Ed. D. Green. Herpetological Conservation 1: 233-245.

06 Bertram, S.M, M. Berrill, and E. Nol. 1996. Male mating success and variation in chorus attendance within and among breeding seasons in the gray treefrog (Hyla versicolor). Copeia 1996: 729-734.

05 Berrill, M., S.M. Bertram, B. Pauli, D. Coulson, M. Kolohon, D. Ostrander. 1995. Comparative sensitivity of amphibian tadpoles to single and pulsed exposures of the forest-use insecticide fenitrothion. Environmental Toxicology and Chemistry 14: 1011-1018.

04 Berrill, M. S.M. Bertram, L. McGillivray, M. Kolohon, and B. Pauli. 1994. Effects of low concentrations of forest-use pesticides on frog embryos and tadpoles. Environmental Toxicology and Chemistry 13: 657-664.

03 Berrill, M., S.M. Bertram, A. Wilson, S. Louis, D. Brigham, and C. Stromberg. 1993. Lethal and sublethal impacts of pyrethroid insecticides on amphibian embryos and tadpoles. Environmental Toxicology and Chemistry 12: 525-539.

02 Berrill, M., S.M. Bertram, D. Brigham, and V, Campbell, 1992. A comparison of three methods of monitoring frog populations. In: Declines in amphibian populations: designing a national monitoring strategy. C. Bishop and K. Pettit (eds.) Occasional paper #76, Canadian Wildlife Service.

01 Berrill, M., S.M. Bertram, P. Tosswill, and V. Campbell. 1992. Is there a bullfrog decline in Ontario? In: Declines in amphibian populations: designing a national monitoring strategy. C. Bishop and K. Pettit (eds.) Occasional paper #76, Canadian Wildlife Service.