Balázs Rosivall

MSc in Biology (2000, Eötvös Loránd University)
PhD in Ecology (2006, Eötvös Loránd University)
assistant professor

Research interests

  • Sex ratio adjustment in birds (contradictory results, differences among populations).
  • Sex differences in environmental sensitivity.
  • Extra-pair paternity (the benefit of females cuckolding their mates).
  • Causes and consequences of hatching asynchrony.
  • Maternal effects as tools of compensation for poor offspring quality.
  • Food allocation, signalling of need, nestling development and nestling competition.


Szász, E., Szöllősi, E., Hegyi, G., Török, J., Rosivall, B. (2017). Rearing conditions have long-term sex-specific fitness consequences in the collared flycatcher. Behavioral Ecology 28:717-723.
Szöllősi, E., Garamszegi, L.Z., Hegyi, G., Laczi, M., Rosivall, B., Török, J. (2016). Haemoproteus infection status of collared flycatcher males changes within a breading season. Parasitology Research 115:4663-4672.
Szász, E., Rosivall, B. (2015). The chimeric embryo hypothesis as a mechanism of avian sex ratio manipulation? Comment on Tagirov and Rutkowska. Behavioral Ecology 26(5):e1-e3
Hargitai, R., Hegyi, G., Herényi, M., Laczi, M., Nagy, G., Rosivall, B., Szöllősi, E., Török, J. (2014). Winter body condition in the Collared Flycatcher: Determinants and carryover effects on future breeding parameters. The Auk 131(3):257-264.. (DOI: 10.1642/AUK-13-158.1)
Szász, E., Garamszegi, L.Z., Hegyi, G., Szöllősi, E., Markó, G., Török, J., Rosivall, B. (2014). Aggressive behavior of the male parent predicts brood sex ratio in a songbird. Naturwissenschaften 101:653–660. (doi: 10.1007/s00114-014-1204-0)
Herényi, M., Garamszegi, L.Z., Hargitai, R., Hegyi, G., Rosivall, B., Szöllősi, E., Török, J. (2014). Laying date and polygyny as determinants of annual reproductive success in male collared flycatchers (Ficedula albicollis): a long-term study. Naturwissenschaften 101:305-312.
Kiss, D., Hegyi, G., Török, J., Rosivall, B. (2013). The relationship between maternal ornamentation and feeding rate is explained by intrinsic nestling quality. Behavioral Ecology and Sociobiology 67:185-192.
Laczi, M., Hegyi, G., Herényi, M., Kiss, D., Markó, G., Nagy, G., Rosivall, B., Szöllősi, E., Török, J. (2013). Integrated plumage colour variation in relation to body condition, reproductive investment and laying date in the collared flycatcher. Naturwissenschaften 100:(10) 983-991.
Boross, N., Markó, G., Laczi, M., Garamszegi, L.Z., Hegyi, G., Herényi, M., Kiss, D., Nagy, G., Rosivall, B., Szöllősi, E., Török, J. (2012). Sources of variation in haematocrit in the Collared Flycatcher (Ficedula albicollis). Ornis Hungarica 20:64-72.
Garamszegi, L.Z., Rosivall, B., Rettenbacher, S., Markó, G., Zsebők, S., Szöllősi, E., Eens, M., Potti, J., Török, J. (2012). Corticosterone, avoidance of novelty, risk-taking and aggression in a wild bird: no evidence for pleiotropic effects. Ethology 118(7):621-635.
Herényi, M., Hegyi, G., Garamszegi, L. Z., Hargitai, R., Michl, G., Rosivall, B., Török, J. (2012). Lifetime offspring production in relation to breeding lifespan, attractiveness, and mating status in male collared flycatchers. Oecologia 170(4):935-942.
Szász, E., Kiss, D., Rosivall, B. (2012). Sex ratio adjustment in birds. Ornis Hungarica 20(1):26-36.
Hegyi, G., Herényi, M., Szöllősi, E., Rosivall, B., Török, J., Groothuis, T.G.G. (2011). Yolk androstenedione, but not testosterone, predicts offspring fate and reflects parental quality. Behavioral Ecology 22:29-38.
Hegyi, G., Rosivall, B., Szöllősi, E., Eens, M., Török, J. (2011) Context-dependent effects of nestling growth trajectories on recruitment probability in the collared flycatcher. Behavioral Ecology and Sociobiology 65:1647-1658.
Szöllősi, E., Cichoń, M., Eens, M., Hasselquist, D., Kempenaers, B., Merino, S., Nilsson, J.-Å., Rosivall, B., Rytkönen, S., Török, J., Wood, M.J., Garamszegi, L.Z. (2011). Determinants of distribution and prevalence of avian malaria in blue tit populations across Europe: separating host and parasite effects. Journal of Evolutionary Biology 24:2014-2024.
Laczi, M., Török, J., Rosivall, B., Hegyi, G. (2011) Integration of spectral reflectance across the plumage: Implications for mating patterns. PLoS ONE 6(8):e23201.
Brommer, J., Alho, J.S., Biard, C., Chapman, J.R., Charmantier, A., Dreiss, A., Hartley, I.R., Hjernquist, M.B., Kempenaers, B., Komdeur, J., Laaksonen, T., Lehtonen, P.K., Lubjuhn, T., Patrick, S.C., Rosivall, B., van Oers, K., van der Velde, M., Tinbergen, J.M., Wilk, T., Winkel, W. (2010). Passerine extra-pair mating dynamics: A Bayesian modeling approach comparing four species. American Naturalist 176(2):178-187.
Rosivall, B., Szöllősi, E., Hasselquist, D., Török, J. (2010). Males are sensitive — sex-dependent effect of rearing conditions on nestling growth. Behavioral Ecology and Sociobiology 64(10):1555-1562.
Stöwe, M., Rosivall, B., Drent, P.J., Möstl, E. (2010). Selection for fast and slow exploration affects baseline and stress-induced corticosterone excretion in Great tit nestlings, Parus major. Hormones and Behavior 58:864-871.
Hegyi, G., Herényi, M., Wilson, A.J., Garamszegi, L.Z., Rosivall, B., Eens, M., Török, J. (2010). Breeding experience and the heritability of female mate choice in collared flycatchers. PLoS ONE 5:e13855.
Rosivall, B., Szöllősi, E., Hasselquist, D., Török, J. (2009). Effects of extra-pair paternity and sex on nestling growth and condition in the collared flycatcher, Ficedula albicollis. Animal Behaviour 77(3):611-617.
Szöllosi, E., Rosivall, B., Hasselquist, D., Török, J. (2009). The effect of parental quality and malaria infection on nestling performance in the collared flycatcher Ficedula albicollis. Journal of Ornithology 150: 519-527.
Hegyi, G., Rosivall, B., Szöllősi, E., Hargitai, R., Eens, M., Török, J. (2008). Phenotypic plasticity in a conspicuous female plumage trait: information content and mating patterns. Animal Behaviour 75:977-989.
Rosivall, B. (2008) Contradictory results in sex ratio studies: populations do not necessarily differ. Behavioral Ecology and Sociobiology 62(2):1037-1042.
Garamszegi, L.Z., Hegyi, G., Szöllősi, E., Rosival, B., Török, J., Eens, M., Møller, A.P. (2007). Phenotypic correlates of digit ratio in a wild bird: implications for the study of maternal effects. Animal Behaviour 74:641-647.
Hegyi, G., Rosivall, B., Szöllősi, E., Hargitai, R., Eens, M., Török, J. (2007). A role for female ornamentation in the facultatively polygynous mating system of collared flycatchers. Behavioral Ecology 18:1116-1122.
Szöllősi, E., Rosivall, B., Török, J. (2007). Is hatching asynchrony beneficial for the brood? Behavioral Ecology 18: 420-426.
Török, J., Hargitai, R., Hegyi, G., Matus, Z., Michl, G., Péczely, P., Rosivall, B., Tóth, G. (2007): Carotenoids in the egg yolks of collared flycatchers (Ficedula albicollis) in relation to parental quality, environmental factors and laying order. Behavioral Ecology and Sociobiology 61:541-550. (DOI 10.1007/s00265-006-0282-1)
Garamszegi, L.Z., Török, J. Hegyi, G., Szöllősi, E., Rosival, B., Eens, M. (2007). Age-dependent expression of song in the collared flycatcher, Ficedula albicollis. Ethology 113:246-256.
Hegyi, G., Török, J., Garamszegi, L.Z., Rosivall, B., Szöllősi, E., Hargitai, R. (2007). Dynamics of multiple sexual signals in relation to climatic conditions. Evolutionary Ecology Research 9:905-920.
Szigeti, B., Török, J., Hegyi, G., Rosivall, B., Hargitai, R., Szöllősi, E., Michl, G. (2007). Egg quality and parental ornamentation in the blue tit Parus caeruleus. Journal of Avian Biology 38(1):105-112.
Rosivall, B. (2006). Allocation of parental investment in birds. PhD Thesis, Eötvös Loránd University.
Garamszegi, L.Z., Rosival, B. Hegyi, G., Szöllősi, E., Török, J., Eens, M. (2006). Determinants of male territorial behavior in a Hungarian collared flycatcher population: roles for plumage traits of residents and challengers. Behavioral Ecology and Sociobiology 60: 663-671.
Hegyi, G., Rosivall, B., Török, J. (2006). Paternal age and offspring growth: separating the intrinsic quality of young from rearing effects. Behavioral Ecology and Sociobiology 60:672-682.
Hegyi, G., Török, J., Tóth, L., Garamszegi, L.Z., Rosivall, B. (2006). Rapid temporal change in the expression and age-related information content of a sexually selected trait. Journal of Evolutionary Biology 19:228-238.
Rosivall, B., Török, J., Szöllősi, E. (2005). Food allocation in collared flycatcher (Ficedula albicollis) broods: Do rules change with the age of nestlings? The Auk 122(4):1112-1122.
Hargitai, R., Török, J., Tóth, L., Hegyi, G., Rosivall, B., Szigeti, B., Szöllősi E. (2005). Effects of environmental conditions and parental quality on inter- and intraclutch egg-size variation in the Collared Flycatcher (Ficedula albicollis). The Auk 122(2):509-522..
Rosivall, B., Szöllősi, E., Török, J. (2005). Maternal compensation for hatching asynchrony in the Collared Flycatcher (Ficedula albicollis). Journal of Avian Biology 36(6):531-537.
Herényi M., Török J., Garamszegi L.Z., Hargitai R., Hegyi G., Michl G., Rosivall B., Szigeti B., Szöllősi E. (2004). Másodlagos nemi jellegek és utódszám kapcsolata a hím örvös légykapóknál. Állattani Közlemények 89(2):31-41.
Rosivall, B., Török, J., Hasselquist, D., Bensch, S. (2004). Brood sex ratios in Collared Flycatchers (Ficedula albicollis): results differ between populations. Behavioral Ecology and Sociobiology 56:346-351.

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