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.


Hegyi G., Laczi M., Kötél D., Csizmadia T., Lőw P., Rosivall B., Szöllősi E., Török J. (2018). Reflectance variation in the blue tit crown in relation to feather structure. Journal of Experimental Biology 221:176727
Hegyi G., Laczi M., Boross N., Jablonszky M., Kötél D., Krenhardt K., Markó G., Nagy G., Rosivall B., Szász E., Garamszegi L. Z., Török J. (2018). When to measure plumage reflectance: a lesson from collared flycatchers Ficedula albicollis. Ibis (DOI: 10.1111/ibi.12609)
Jablonszky M., Szász E., Krenhardt K., Markó G., Hegyi G., Herényi M., Laczi M., Nagy G., Rosivall B., Szöllősi E., Török J., Garamszegi L. Z. (2018). Unravelling the relationships between life history, behaviour and condition under the pace-of-life syndromes hypothesis using long-term data from a wild bird. Behavioral Ecology and Sociobiology 72:52.
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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