Publications

Hoyer, K.A, Dijkstra, P.D., Galarowicz, T.L., Harig, J.R., Jonas, J.L., Marsden, J.E., Smith, J.B. & McNaught, J.A.S. 2025 Routine metabolism of larval and juvenile Lake Whitefish (Coregonus clupeaformis) and Cisco (C. artedi) at three temperatures. Provisionally accepted, Journal of Great Lakes Research 

Dijkstra, P.D., Fialkowski, R.J., Bush, B.J., Moore, T.I., Wong, R.Y. & Harvey, A.R. 2024. Oxidative stress in the brain is regulated by social status in a highly social cichlid fish. Frontiers in Behavioral Neuroscience 18: 1477984 link

 ***This study was highlighted in Yahoo News, Earth.com, Technology Networks, and KIJK (Dutch)

Hartman, H.A., Mitchell, H.A. & Dijkstra, P.D. 2024. Filial cannibalism influences the link between gonadal development and antioxidant function in a mouthbrooding cichlid fish. microPublication Biology. 10.17912/micropub.biology.001352 link

Dijkstra, P.D., Funnell, T.R., Fialkowski, R.J., Piefke, T.J., Border, S.E., Aufdemberge, P.M. & Hartman, H.A. 2024. Sexual selection may support phenotypic plasticity in male colouration of an African cichlid fish. Proceedings of the Royal Society of London, Biological Sciences 291: 20241127 link

Culbert, B.M., Fialkowski, R., Border, S.E., Bolitho, I. & Dijkstra, P.D. 2023. Social rank affects relationships between hormones and oxidative stress in a cichlid fish. Hormones and Behavior 152: 105365 link 

Dijkstra, P.D., Piefke, T.J. & Bonnell, T.R. 2023. Behavioral changes during social ascent and descent in replicate social networks of an African cichlid fish. Hydrobiologia 850: 2405–2423 link

Sawecki, J & Dijkstra, P.D. 2022. Mothers reduce the cost of reproduction by dynamic changes in antioxidant function and filial cannibalism. Biology Letters 18: 20220319 link

 ***This study was highlighted in the New Scientist, National Geographic, Smithsonian Magazine, and CBC Radio

Fialkowski, R., Border, S.E., Bolitho, I., Dijkstra, P.D. 2022. Social dominance and reproduction result in increased integration of oxidative state in males of an African cichlid fish. Comparative Biochemistry and Physiology, Part A 269: 111216 link

Culbert, B.M., Dijkstra, P.D., Gilmour, K.M. & Balshine, S. 2022. Social ascension elicits tissue-specific antioxidant adjustments in a group-living fish. Comparative Biochemistry and Physiology, Part A 265: 111126 link

Funnell, T., Fialkowski, R. & Dijkstra, P.D. 2022. Social dominance does not increase oxidative stress in a female dominance hierarchy of an African cichlid fish. Ethology 128: 15-22 link

Wasserman, MD, Wing, Boswell, Bickford, N., Hobbs, K. Dijkstra, P.D. & Carr, J. 2021. A universal theory of biological stress. Integrative and Comparative Biology 61: 2109-2118 link

Border, S.E., Piefke, T., Funnell, T., Fialkowski, R., Sawecki, J. & Dijkstra, P.D. 2021. Social instability influences rank-specific patterns of oxidative stress in a cichlid fish. Journal of Experimental Biology 224: jeb237172 link

Maguire, S.M., DeAngelis, R.S., Dijkstra, P.D., Jordan, A. & Hofmann, H.A. 2021. Social network dynamics predict hormone levels and behavior in a highly social cichlid fish. Hormones and Behavior 132: 104994 link

Piefke, T., Bonnell, T.R., DeOliveira, G., Border, S.E. & Dijkstra, P.D. 2021. Social network stability is impacted by removing a dominant male in replicate dominance hierarchies of a cichlid fish. Animal Behaviour 175: 7-20 link

Fialkowski, R., Aufdemberge, P, Wright, V.D. & Dijkstra, P.D. Radical change: 2021. Radical change: temporal patterns of oxidative stress during social ascent in a dominance hierarchy. Behavioral Ecology and Sociobiology 75, Article number: 43 link

Sawecki, J., Miros, E., Border, S.E. & Dijkstra, P.D. 2019. Reproduction and maternal care increase oxidative stress in a mouthbrooding cichlid. Behavioral Ecology 30: 1662-1671 link

Border, S.E., DeOliveira, G., Janeski, H., Piefke, T., Brown, T. & Dijkstra, P.D. 2019. Social rank, body coloration and agonistic social networks predict oxidative stress in a cichlid fish. Behavioral Ecology 30: 490-499 link

Border, S.E., Piefke, T., Fialkowski, R., Tryc, M., Funnell, T., DeOliveira, G. & Dijkstra, P.D. 2019. Color change and pigmentation in a color polymorphic cichlid fish. Hydrobiologia 832: 175-191 link

Dijkstra, P.D., Preenen, P.T.Y., van Essen, H. 2018. Does blue enhance winning probability in Judo contests? Frontiers in Psychology 9: 45 link

***This study was highlighted in ScienceDaily, Medical Xpress, and Haaretz (Hebrew). This is our own piece published in JudoContact (Flemish)

Dijkstra, P.D. & Border, S.E. 2018. How does male-male competition generate negative frequency-dependent selection and disruptive selection during speciation? Current Zoology 64: 89-99 link

Tinghitella, R.M., Lackey, A.C.R., Martin, M., Dijkstra, P.D., Drury, J.P., Heathcote, R., Keagy, J., Scordato, E.S.C. & Tyers, A.M. (Reply). 2018. A major player need not be the only player in speciation: a response to comments on Tinghitella et al. Behavioral Ecology 29: 802–803 link

Tinghitella, R.M, Lackey, A.C.R., Martin, M., Dijkstra, P.D., Drury, J.P., Heathcote, R., Keagy, J., Scordato, E.S.C., & Tyers, A.M. (Invited). 2018. On the role of male competition in speciation: A review and research agenda. Behavioral Ecology 29: 783–797 link

Dijkstra, P.D., Maguire, S., Harris, R.M., Rodriguez, A., DeAngelis, R., Flores, S. & Hofmann, H.A. 2017. The melanocortin system regulates body pigmentation and social behaviour in the cichlid fish Astatotilapia burtoni. Proceedings of the Royal Society of London, Biological Sciences 284: 20162838 link

Dijkstra, P.D., Pierotti, M.E.R, Seehausen, O. & Metcalfe, N.B. 2016. Metabolism, oxidative stress and territorial behaviour in a female colour polymorphic cichlid fish. Behavioral Ecology and Sociobiology 70: 99–109 link

Harris, R.M., Dijkstra, P.D. & Hofmann, H.A. 2014. Comparative promoter analysis of the pro-opiomelanocortin (pomc) gene family. General and Comparative Endocrinology 195: 107-115 link

Kidd, M.R. *, Dijkstra, P.D.*, Alcott, C., Lavee, D., Ma, J., O'Connell, L.A. & Hofmann, H.A. 2013. Prostaglandin F2α facilitates female mating decisions based on male performance. Behavioral Ecology and Sociobiology 67: 1307-1315 link

Van der Sluijs, Dijkstra, P.D., et al. 2013. A test of genetic association between male nuptial coloration and female mating preferences or male aggression biases in a polymorphic cichlid fish. Current Zoology 59: 221-229 link

Dijkstra, P.D., Seehausen, O. & Metcalfe, N.B. 2013. Metabolic differentiation in an incipient species pair of cichlid fish. Journal of Fish Biology 82: 1975-1989 link

Ros, A.F.H., Oliveira, R.F., Dijkstra, P.D., Groothuis, T.G.G. 2012 The Immune system is inversely related to, but does not cause variation in androgen levels in a cichlid fish species. Fish and Shellfish Immunology 33: 130-133 link

Dijkstra, P.D., Verzijden, M.N., Groothuis, T.G.G. & Hofmann, H.A. 2012. Divergent hormonal responses to social competition in closely related species of haplochromine cichlid fish. Hormones and Behavior 61: 518-526 link

Dijkstra, P.D., Schaafsma, S.M., Hofmann, H.A. & Groothuis, T.G.G. 2012. Winner effect without winning: unresolved social conflicts increase the probability of winning a subsequent contest in a cichlid fish. Physiology and Behavior 105: 489-492 link

Dijkstra, P.D., Wiegertjes, G., Forlenza, M., van der Sluijs, I., Hofmann, H.A., Metcalfe, N.B. & Groothuis, T.G.G. 2011. The role of physiology in the divergence of two incipient cichlid species. Journal of Evolutionary Biology 24: 2639-2652. link

Dijkstra, P.D., Schwekendiek, D. & Preenen, P.T.Y. 2011. Gender-asymmetry in dating success of Korean adoptees in the West. Sociology Mind 1: 91-95. link

***This study was highlighted in Metro (Dutch) and Kompas (Indonesian)

Dijkstra, P.D. & Groothuis, T.G.G. 2011. Male-male competition as a diversifying force: evidence in haplochromine cichlid fish. International Journal of Evolutionary Biology 11: 9 pages link

Dijkstra, P.D., Lindström, J. Metcalfe, N.B., Hemelrijk, C.K., Brendel, M. Seehausen, O. & Groothuis, T.G.G. 2010. Frequency-dependent social dominance in a color polymorphic cichlid fish. Evolution 64: 2797-2807. link

Dijkstra, P.D., van Dijk, S., Groothuis, T.G.G., Pierotti, M.E.R. & Seehausen, O. 2009. Behavioral dominance between female color morphs of a Lake Victoria cichlid fish. Behavioral Ecology 20: 593-600. link

Dijkstra, P.D., Hemelrijk, C.K, Seehausen, O. & Groothuis, T.G.G. 2009. Colour polymorphism and intrasexual selection in assemblages of cichlid fish. Behavioral Ecology 20: 138-144. link

Dijkstra, P.D., Seehausen, O., Fraterman, R. E. & Groothuis, T.G.G. 2008. Learned aggression biases in Lake Victoria cichlids. Animal Behaviour 76: 649-655. link

Dijkstra, P.D. & Preenen, P.T.Y. 2008. No effect of blue on winning contests in Judo. Proceedings of the Royal Society of London, Biological Sciences 275: 1157-1162. link

***This study was highlighted in the New York Times

Dijkstra, P.D., van der Zee, E.M. & Groothuis, T.G.G. 2008. Territory quality affects female mate preference in a Lake Victoria cichlid fish. Behavioral Ecology and Sociobiology 62: 747-755. link

Dijkstra, P.D., Seehausen, O. & Groothuis, T.G.G. 2008. Intrasexual competition among females and the stabilization of a conspicuous colour polymorphism in a Lake Victoria cichlid. Proceedings of the Royal Society of London, Biological Sciences 275: 519-526. link

Dijkstra, P.D., Hekman, R. Schulz, R. W. & Groothuis, T.G.G. 2007. Social stimulation, nuptial coloration, androgens, and immunocompetence in a sexual dimorphic cichlid fish. Behavioral Ecology and Sociobiology 61: 599-609. link

Dijkstra, P.D., Seehausen, O. Pierotti, M.E.R. & Groothuis, T.G.G. 2007. Male-male competition and speciation: aggression bias towards differently coloured rivals varies between stages of speciation in a Lake Victoria cichlid species complex. Journal of Evolutionary Biology 20: 496-502. link

Dijkstra, P.D., Seehausen, O., Gricar, B.L.A., Maan, M.E. & Groothuis, T.G.G. 2006. Can male-male competition stabilize speciation? A test in Lake Victoria cichlids. Behavioral Ecology and Sociobiology 59: 704-713. link

Dijkstra, P.D., Seehausen, O. & Groothuis, T.G.G. 2005. Direct male-male competition can facilitate invasion of new colour types in Lake Victoria cichlids. Behavioral Ecology and Sociobiology 58: 136-143. link