Publications

Find more information about my publications on my Google Scholar page.

91. Fernlund Isaksson, E., & Fitzpatrick, J.L. 2023. Examining the potential for resource-dependent female reproductive fluid-sperm interactive effects in a livebearing fish. Journal of Evolutionary Biology 36(4): 709-719.

90. Stanbrook, E., Fitzpatrick, J.L., Balshine, S., & Schultz, S. 2022. The evolution of monogamy in cichlids and marine reef fishes. Frontiers in Ecology and Evolution 10:1045383.

89. Kahrl, A.F., Snook, R.R. & Fitzpatrick, J.L. 2022. Fertilization mode differentially impacts the evolution of vertebrate sperm components. Nature Communications 13:1-9.

88. Fernlund Isaksson, E., Reuland, C., Kahrl, A.F., Devigili, A., & Fitzpatrick, J.L. 2022. Resource-dependent investment in male sexual traits in a viviparous fish. Behavioral Ecology 33:954-966.

87. Juntorp, E., Åkerman, M. & Fitzpatrick, J.L. 2022. Are behavioral responses to eyespots in sticklebacks influenced by the visual environment? An experimental examination. Ecology and Evolution 12:e9089.        

86. Vega-Trejo, R., de Boer, R.A., Fitzpatrick, J.L., & Kotrschal, A. 2022. Sex-specific inbreeding depression: A meta-analysis. Ecology Letters 25:1009-1026.

85. Fitzpatrick, J.L., Kahrl, A.F., & Snook, R.R. 2021. SpermTree, a species-level database of sperm morphology spanning the animal tree of life. Scientific Data 9:1-6.   

84. Kahrl, A.F., Snook, R.R. & Fitzpatrick, J.L. 2021. Fertilization mode drives shifts in sperm size across the animal tree of life. Nature Ecology & Evolution 5:1153-1164.           

83. de Boer, R.A., Vega-Trejo, R., Kotrschal, A., & Fitzpatrick, J.L. 2021. Meta-analytic evidence that animals rarely avoid inbreeding. Nature Ecology & Evolution 5:949-964. 

82. Reuland, C., Simmons, L.W., Lüpold, S., & Fitzpatrick, J.L. 2021. Weapons evolve faster than sperm in bovids and cervids. Cells 10:1062. 

81. McNeil, R.M., Devigili, A., Kolm, N., & Fitzpatrick, J.L. 2021. Does brain size affect mate choice? An experimental examination in pygmy halfbeaks. Behavioral Ecology 36:1103-1113.

80. Devigili, A., Fernlund Isaksson, E., Puniamoorthy, N., & Fitzpatrick, J.L. 2021. Behavioral variation in the pygmy halfbeak Dermogenys collettei: comparing shoals with contrasting ecologies. Frontiers in Ecology and Evolution 9:607600.

79. Reuland, C., Culbert, B.M., Fernlund Isaksson E., Kahrl, A.F., Devigili, A., & Fitzpatrick, J.L. 2021. Male-male behavioural interactions drive social-dominance-mediated differences in ejaculate traits. Behavioral Ecology 32:168-177. 

78. Fitzpatrick, J.L. Willis, C., Devigili, A., Young, A., Carroll, M., Hunter, H.R. & Brison, D.R. 2020. Chemical signals from eggs facilitates cryptic female choice in humans. Proceedings of the Royal Society of London B 287:20200805. 

77. Lüpold, S., de Boer, R.A., Evans, J.P., Tomkins, J.L., & Fitzpatrick, J.L. 2020. How sperm competition shapes the evolution of testes and sperm: a meta-analysis. Philosophical Transactions of the Royal Society B 375:20200064. 

76. Fitzpatrick, J.L. 2020. Sperm competition and fertilization mode in fishes. Philosophical Transactions of the Royal Society B 375:20200074. 

75. van der Bijl, W., Zeuss, D., Chazot, N., Tunström, K., Wahlberg, N., Wiklund, C., Fitzpatrick, J.L., Wheat, C.W. 2020. Butterfly dichromatism primarily evolved via Darwin’s, not Wallace’s, model. Evolution Letters 4:545-555. 

74. Fitzpatrick, J.L., Bridge, C.D., & Snook, R.R. 2020. Repeated evidence that the accelerated evolution of sperm is associated with their fertilization function. Proceedings of the Royal Society of London B 287:20201286. 

73. Reuland, C., Culbert, B.M., Devigili, A., Kahrl, A.F., & Fitzpatrick, J.L. 2020. Contrasting female mate preference for red coloration in a fish. Current Zoology 66:425-433. 

72. Ogden, H.J.P., de Boer, R.A., Devigili, A., Reuland, C., Kahrl, A.F., & Fitzpatrick, J.L. 2020. Mate choice for large gravid spots in a livebearing fish. Behavioral Ecology 31:63-72. 

71. Rowley, A.G., Locatello, L., Kahrl, A., Rego, M., Boussard, A., Garza‐Gisholt, E., Kempster, R.M., Collin, S.P., Giacomello, E., Follesa, M.C., Porcu, C., Evans, J.P., Hazin, F., Garcia‐Gonzalez, F., Daly‐Engel, T.S, Mazzoldi, C., & Fitzpatrick, J.L. 2019. Sexual selection and the evolution of sperm morphology in sharks. Journal of Evolutionary Biology 32:1027-1035. 

70. Simmons, L.W. & Fitzpatrick, J.L. 2019. Rapid divergent evolution of female genitalia. Nature Communications 10:1-8. 

69. Hansen-Wheat, C., Fitzpatrick, J.L., Rogell, B. & Temrin, H. 2019. Behavioural correlations of the domestication syndrome are decoupled in modern dog breeds. Nature Communications 10:1-9. 

68. Fenkes, M., Fitzpatrick, J.L., Shiels, H.A., & Nudds, R.L. 2019. Acclimation temperature changes spermatozoa flagella length relative to head size in brown trout. Biology Open 8:039461. 

67. Devigili, A., Evans, J.P. & Fitzpatrick, J.L. 2019. Predation shapes sperm performance surfaces in guppies. Proceedings of the Royal Society of London B 286:20190869. 

66. Dey, C.J., O’Connor, C.M., Wilkinson, H., Shultz, S., Balshine, S., & Fitzpatrick, J.L. 2019. Confounding social and mating systems predictably leads to biased results when examining the evolution of cooperative breeding in cichlids: A response to Tanaka et al. Ethology 125:409-414.

65. Rêgo, M.G, Araujo, M.L.G, Barros, M.E.G., Aires, L.D., Oliveira, P.G.V., Hazin F.H.V., Fitzpatrick, J.L., & Evêncio-Net, J. 2019. Morphological description of ovary and uterus of the nurse shark (Ginglymostoma cirratum) caught off at the Fortaleza coast, Northeast Brazil. Pesquisa Veterinária Brasileira 39:997-1004. 

64. Rowley, A.G., Daly-Engel, T.S., & Fitzpatrick, J.L. 2019. Testes size increases with sperm competition risk and intensity in bony fish and sharks. Behavioral Ecology 30:364-371. 

63. Miller, J.S.,Bose, A.P.H., Fitzpatrick, J.L. & Balshine, S. 2019. Sperm maturation and male tactic-specific differences in ejaculates in plainfin midshipman fish Porichthys notatus. Journal of Fish Biology 94:434-445. 

62. Ogden, H. & Fitzpatrick, J.L. 2019. An eye for reproduction: gravid spots in fish. Molecular Reproduction and Development 86:251. 

61. Hansen-Wheat, C., Fitzpatrick, J.L., & Temrin, H. 2018. Wolf hybrids highlight the importance of human-directed play behaviour during the domestication of dogs. Journal of Comparative Psychology 132:373.

60. Devigili, A.*, Fitzpatrick, J.L.*, Gasparini, C., Ramnarine, I.W., Pilastro, A., & Evans, J.P. 2018. Possible glimpses into early speciation: the effect of ovarian fluid on sperm velocity accords with post-copulatory isolation between two guppy populations. Journal of Evolutionary Biology 31: 66-74. (* shared first author) 

59. Fox, G., Darolti, I., Hibbitt, J.D., Preziosi, R.F., Fitzpatrick, J.L., & Rowntree, J.K. 2018. Genetic assessment of ex situ populations to aid species conservation and maintain heterozygosity in non-model species. Journal of Zoo and Aquarium Research 6:50-56. 

58. Simmons, L.W., Lüpold, S., & Fitzpatrick, J.L. 2017. Evolutionary trade-offs between secondary sexual traits and ejaculates. Trends in Ecology and Evolution 23:964-976. 

57. Dey, C.J., O’Connor, C.M., Wilkinson, H., Shultz, S., Balshine, S., & Fitzpatrick, J.L. 2017. Direct benefits and evolutionary transitions to complex societies. Nature Ecology & Evolution 1:0137.

56. Grueber, C.E., Fitzpatrick, J.L., Devigili, A., Gasparini, C., Ramnarine, I.W., & Evans, J.P. 2017. Population demography and heterozygosity-fitness correlations in natural guppy populations: an examination using sexually selected fitness traits. Molecular Ecology 26:4621-4643. 

55. Fenkes, M., Fitzpatrick, J.L., Ozolina, K., Shiels, H.A., & Nudds, R.L. 2017. Sperm in hot water: direct and indirect thermal challenges interact to impact on brown trout sperm quality. Journal of Experimental Biology 220:2513-2520. 

Rowley A.G. & Fitzpatrick, J.L. 2016. Sperm Competition. Encyclopaedia of Evolutionary Biology. 

54. Simmons, L.W. & Fitzpatrick, J.L. 2016. Sperm competition and the coevolution of pre- and post-copulatory traits: weapons evolve faster than testes among onthophagine dung beetles. Evolution 70:998-1008.

53. Fenkes, M., Shiels, H.A., Fitzpatrick, J.L. & Nudds, R.L. 2016. The potential impacts of migratory difficulty, including warmer waters and altered flow conditions, on the reproductive success of salmonid fishes. Comparative Biochemistry and Physiology Part A: Molecular and Integrative Physiology 193:11-21. 

52. Rêgo, M.G., Fitzpatrick, J.L., Hazin, H.V., Araujo, M.L., Barros, M.E.G., & Neto, L.E. 2016. Comparison of the morphology and histomorphology of spermatogenic cyst of three shark species with diametric testes. The Anatomical Record 299:759-798. 

51. Lüpold, S. & Fitzpatrick, J.L. 2015. Sperm number trumps sperm size in mammalian ejaculate evolution. Proceedings of the Royal Society of London B 282:20152122. 

50. Fitzpatrick, J.L., Earn, D.J.D., Bucking, C., Craig, P.M., Nadella, S., Wood, C.M., & Balshine, S. 2015. Postcopulatory consequences of female mate choice in a fish with alternative male reproductive tactics. Behavioural Ecology 27:312-320.

49. Lüpold, S., Tomkins, J.L., Simmons, L.W., & Fitzpatrick, J.L. 2015. No evidence for a trade‐off between sperm length and male premating weaponry. Journal of Evolutionary Biology 28: 2187-2195. 

48. Rêgo, M.G., Fitzpatrick, J.L., Hazin, F.H.V., Goes de Araujo, M.L., da Silveira, L.M., Oliveira, P.G.V., & Evencio-Neto, J. 2015. Characterization of testicular morphology and spermatogenesis in the nurse sharks Ginglymostoma cirratum (Bonnaterre, 1788). Zoomorphology 134: 117-123. 

47. Lüpold, S., Tomkins, J.L., Simmons, L.W., & Fitzpatrick, J.L. 2014. Female monopolization mediates the relationship between pre- and postcopulatory sexual traits. Nature Communications 5:3184.

46. Simpson, J.L., Humphries, S., Evans, J.P., Simmons, L.W. & Fitzpatrick, J.L. 2014. Relationship between sperm length and speed differ among three internally and three externally fertilizing species. Evolution 68(1), 92-104. 

45.  Fitzpatrick J.L. & Evans J.P.E. 2014. Postcopulatory inbreeding avoidance in guppies. Journal of Evolutionary Biology 27: 2585-2594. 

44. Fitzpatrick, L.J., Gasparini, C., Fitzpatrick, J.L., and Evans, J.P. 2014. Male-female relatedness and patterns of male reproductive investment in guppies. Biology Letters 20140166. 

43. Fitzpatrick J.L. & Lüpold S. 2014. Sexual selection and the evolution of sperm quality. Molecular Human Reproduction 20: 1180-1189. 

42. de Busserolles, F., Fitzpatrick, J.L., Marshall, N.J., Collin, S.P. 2014. The Influence of Photoreceptor Size and Distribution on Optical Sensitivity in the Eyes of Lanternfishes (Myctophidae). PLoS One 9(6). 

41. Craig P.M., Fitzpatrick J.L., Walsh P.J., Wood C.M., & McClelland G.B. 2014. Coping with aquatic hypoxia: How the plainfin midshipman (Porichthys notatus) tolerates the intertidal zone. Environmental Biology of Fishes 97, 163-172. 

40.  Kelley, J.L., Fitzpatrick, J.L., & Merilaita, S. 2013. Spots and stripes: ecology and colour pattern evolution in butterflyfishes. Proceedings of the Royal Society of London B 280(1757), art20122730. 

39. de Busserolles, F., Fitzpatrick, J.L., Paxton, J.R., Marshall, N.J., & Collin, S.P. 2013. Eye-Size Variability in Deep-Sea Lanternfishes (Myctophidae): An Ecological and Phylogenetic Study. PLoS One 8(3), e58519. 

38. Simmons, L.W. & Fitzpatrick, J.L. 2012. Sperm wars and the evolution of male fertility. Reproduction 144(5), 519-534.

37.  Fitzpatrick, J.L., Almbro, M., Gonzalez-Voyer, A., Kolm, N., & Simmons, L.W. 2012. Male contest competition and the coevolution of weaponry and testes in pinnipeds. Evolution 66(11), 3595-3604. 

36. Evans, J.P., Garcia-Gonzalez, F., Almbro, M., Robinson, O., & Fitzpatrick, J.L. 2012. Assessing the potential for egg chemoattractants to mediate sexual selection in a broadcast spawning marine invertebrate. Proceedings of the Royal Society of London B 279, 2855-2861.

35. Fitzpatrick, J.L., Kempster, R., Daly-Engel, T.S., Collin, S.P., & Evans, J.P. 2012. Assessing the potential for postcopulatory sexual selection in elasmobranchs. Journal of Fish Biology 80(5), 1141-1158. 

34. Fitzpatrick, J.L., Almbro, M., Gonzalez-Voyer, G., Hamada, S., Pennington, C., Scanlan, J., & Kolm, N. 2012. Sexual selection uncouples the evolution of brain and body size in pinnipeds. Journal of Evolutionary Biology 25(7), 1321-1330. 

33. Fitzpatrick, J.L., Simmons, L.W. & Evans, J.P.E. 2012. Complex patterns of multivariate selection on the ejaculate of a broadcast spawning marine invertebrate. Evolution 66: 2451-2460. 

32. Wong, M., Jordan, L., Marsh-Rollo, S., St-Cyr, S., Reynolds, J., Stiver, K.A., Desjardins, J.K., Fitzpatrick, J.L., & Balshine, S. 2012. Mating systems in cooperative breeders: the roles of resource dispersion and conflict mitigation. Behavioral Ecology 23(3), 521-530.

31. Sopinka, N.M., Fitzpatrick, J.L., Taves, J.E., Ikonomou, M.G., Marsh-Rollo, S.E., & Balshine, S. 2012. Does proximity to aquatic pollution impact reproductive traits in a wild-caught intertidal fish? Journal of Fish Biology 80(6), 2374-2383.

30. Fitzpatrick, J.L. & Baer B. 2011. Polyandry reduces sperm length variation in social insects. Evolution 65: 3006-3012. 

29. Desjardins, J.K., Fitzpatrick, J.L., Stiver, K.A., Van Der Kraak, G.J. & Balshine, S. 2011. Lunar and diurnal cycles in reproductive physiology and behavior in a natural population of cooperatively breeding fish. Journal of Zoology 285: 66-73.

28. Bucking, C., Fitzpatrick, J.L., Nadella, S.R., McGaw, I.J. & Wood, C.M. 2011. Assimilation of water and dietary ions by the gastrointestinal tract during digestion in seawater-acclimated rainbow trout. Journal of Comparative Physiology B-Biochemical Systemic and Environmental Physiology 181: 615-630. 

27. Fitzpatrick, J.L., Akbarashandiz, H., Sakhrani, D., Biagi, C.A., Pitcher, T.E., & Devlin R.H. 2011. Cultured growth hormone transgenic salmon are reproductively out-competed by wild-reared salmon in semi-natural mating arenas. Aquaculture 312: 185-191. 

26. Fitzpatrick, J.L., Garcia-Gonzalez, F. & Evans, J.P. 2010. Linking sperm length and velocity: the importance of intramale variation. Biology Letters 6: 797-799. 

25. Evans, J.P., Box, T.M., Brooshooft, P., Tatler, J.R., & Fitzpatrick, J.L. 2010. Females increase egg deposition in favor of large males in the rainbowfish, Melanotaenia australis. Behavioral Ecology 21: 465-469. 

Montgomerie, R. & Fitzpatrick, J.L. 2009. Testis size, sperm size and sperm competition.  In Reproductive Biology and Phylogeny of Fishes (BGM Jamieson, ed.). Science Publishers, Enfield, New Hampshire, USA.

24. Fitzpatrick, J.L., Montgomerie, R., Desjardins, J.K., Stiver, K.A., Kolm, N., & Balshine, S. 2009. Female promiscuity promotes the evolution of faster sperm in cichlid fishes. Proceedings of the National Academy of Sciences of the USA 106: 1128-1132.

23. Fitzpatrick, J.L. & Evans, J.P. 2009. Reduced heterozygosity impairs sperm quality in endangered mammals. Biology Letters 5: 320-323.

22. Fitzpatrick, J.L., Craig, P.M., Bucking, C., Balshine, S., Wood, C.M., & McClelland, G.B. 2009. Sperm performance under hypoxic conditions in an intertidal fish (Porichthys notatus). Canadian Journal of Zoology 87: 464-469.

21. Marentette, J.R., Fitzpatrick, J.L., Berger, R.G., & Balshine, S. 2009. Multiple male reproductive morphs in the invasive round goby (Apollonia melanostoma). Journal of Great Lakes Research 35: 302-308. 

20. Mileva, V.R., Fitzpatrick, J.L., Marsh-Rollo, S.E., Gilmour, K.M., Wood, C.M., & Balshine, S. 2009. The stress response of the highly social African cichlid Neolamprologus pulcher. Physiological and Biochemical Zoology 82: 720-729. 

19. Nadella, S.R., Fitzpatrick, J.L., Franklin, N., Bucking, C., Smith, S., & Wood, C.M. 2009. Toxicity of Cu, Zn, Ni and Cd to developing embryos of the blue mussel (Mytilus trossolus) and the protective effect of dissolved organic carbon. Comparative Biochemistry and Physiology C 149: 340-348. 

18. Bucking, C., Fitzpatrick, J.L., Nadella, S.R., & Wood, C.M. 2009. Post-prandial metabolic alkalosis in the seawater-acclimated trout: the alkaline tide comes in. Journal of Experimental Biology 212: 2159-2166. 

17. Stiver, K.A., Fitzpatrick, J.L., Desjardins, J.K., & Balshine, S. 2009. Mixed parentage in Neolamprologus pulcher groups. Journal of Fish Biology 74: 1129-1135. 

16. Suk, H.K., Neff, B.D., Fitzpatrick, J.L., & Balshine, S. 2009. Isolation and characterization of polymorphic microsatellite loci in plainfin midshipman fish. Hereditas 146: 204-207. 

15. Sopinka, N.M., Fitzpatrick, J.L., Desjardins, J.K., Stiver, K.A., Marsh-Rollo, S.E., & Balshine, S. 2009. Liver size reveals social status in an African cichlid fish. Journal of Fish Biology 75: 1-16. 

14. Gonzalez-Voyer, A., Fitzpatrick, J.L., & Kolm, N. 2008. Sexual selection governs parental care patterns in cichlid fish. Evolution 62: 2015-2026. 

13. Fitzpatrick, J.L., Desjardins, J.K., Stiver, K.A., Montgomerie, R., & Balshine, S. 2008. Female mediated cause and consequences of status change in a social fish. Proceedings of the Royal Society of London B 275: 929-936. 

12. Fitzpatrick, J.L. & Liley, N.R. 2008. Ejaculate expenditure and timing of gamete release in rainbow trout (Oncorhynchus mykiss). Journal of Fish Biology 73: 262-274. 

11. Fitzpatrick, J.L., Nadella, S., Bucking, C., Balshine, S., & Wood, C.M. 2008. The relative sensitivity of sperm, eggs and embryos to copper in the blue mussel (Mytilus trossulus). Comparative Biochemistry and Physiology C 147: 441-449. 

10. Stiver, K.A., Fitzpatrick, J.L., Desjardins, J.K., Neff, B., Quinn, J.S., & Balshine, S. 2008. The role of genetic relatedness among social mates in a cooperative breeder.  Behavioral Ecology 19: 816-823. 

9. Desjardins, J.K., Fitzpatrick, J.L., Stiver, K.A., Van der Kraak, G., & Balshine, S. 2008. Sex and status in a cooperative breeding fish: behavior and androgens. Behavioral Ecology and Sociobiology 62: 785-794. 

8. Desjardins, J.K., Fitzpatrick, J.L., Milligan, N., Van der Kraak, G., & Balshine, S. 2008. Costs and benefits of polygyny in the cichlid Neolamprologus pulcher. Animal Behavior 75: 1771-1779. 

7. Desjardins, J.K., Stiver, K.A., Fitzpatrick, J.L., & Balshine, S. 2008. Differential responses to territory intrusions in cooperatively breeding fish.  Animal Behavior 75: 595-604. 

6. Fitzpatrick, J.L., Desjardins, J.K., Milligan, N., Montgomerie, R., & Balshine, S. 2007. Reproductive‑tactic-specific variation in sperm swimming speeds in a shell-brooding cichlid. Biology of Reproduction 77: 280-284. 

5. Wood, C.M., Bucking, C., Fitzpatrick, J., & Nadella, S.R. 2007. The alkaline tide goes out and the nitrogen stays in after feeding in the dogfish shark, Squalus acanthias. Respiratory Physiology and Neurobiology 159: 163-170.

4. Stiver, K.A., Desjardins, J.K., Fitzpatrick, J.L., Neff, B., Quinn, J.S., & Balshine, S. 2007. Evidence for size and sex-specific dispersal in a cooperatively breeding cichlid fish. Molecular Ecology 16: 2974-2984. 

3. Fitzpatrick, J.L., Desjardins, J.K., Stiver, K.A., Montgomerie, R., & Balshine, S. 2006. Male reproductive suppression in the cooperatively breeding fish Neolamprologus pulcher. Behavioral Ecology 17: 25-33. 

2. Stiver, K.A., Fitzpatrick, J., Desjardins, J.K., & Balshine, S. 2006. Sex differences in rates of territory joining and territory inheritance in cooperatively breeding cichlid fish from Lake Tanganyika. Animal Behavior 71: 449-456. 

1. Fitzpatrick, J.L., Henry, J.C., Liley, N.R., & Devlin, R.H. 2005. Sperm characteristics and fertilization success of masculinized Coho salmon (Oncorhynchus kisutch). Aquaculture 249: 459-468.