Eszter Szász

MSc in Biology (2012, Eötvös Loránd University)
research assistant, PhD candidate

Research interests

  • Sex ratio manipulation in birds - ultimate and proximate causes
  • Role of behavioural traits in sex ratio manipulation in birds
  • Sex-specific fitness consequences of behavioural, morphological and environmental variables
  • Consistency of behavioural traits in the courtship and nestling caring periods
  • Sex ratio manipulation in humans - influential factors and fitness consequences


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.
Jablonszky, M., Szász, E., Markó, G., Török, J., Herczeg, G., Garamszegi, L.Z. (2017). Escape ability and risk-taking behaviour in a Hungarian population of the collared flycatcher (Ficedula albicollis). Behavioral Ecology and Sociobiology 71:54.
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.
Zsebők, S., Herczeg, G., Blázi, Gy., Laczi, M., Nagy, G., Szász, E., Markó, G., Török, J., Garamszegi, L. Z. (2017). Short- and long-term repeatability and pseudo-repeatability of bird song: sensitivity of signals to varying environments. Behavioral Ecology and Sociobiology 71:154.
Krenhardt, K., Markó, G., Szász, E., Jablonszky, M., Zsebők, S., Török, J., Garamszegi, L.Z. (2016). A test on within-individual changes in risk-taking behaviour due to experience to predation in the Collared Flycatcher (Ficedula albicollis). Ornis Hungarica 24:115-127. (DOI: 10.1515/orhu-2016-0007)
Garamszegi, L.Z., Zagalska-Neubauer, M. Canal, D., Markó, G., Szász, E., Zsebők, S., Szöllősi, E., Herczeg, G., Török, J. (2015). Malaria parasites, immune challenge, MHC variability, and predator avoidance in a passerine bird. Behavioral Ecology 26:1292-1302. (DOI:10.1093/beheco/arv077)
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
Garamszegi, L.Z., Markó, G., Szász, E., Zsebők, S., Azcárate, M., Herczeg, G., Török, J. (2015). Among-year variation in the repeatability, within- and between-individual, and phenotypic correlations of behaviors in a natural population. Behavioral Ecology and Sociobiology 69:2005–2017. (DOI 10.1007/s00265-015-2012-z)
Hegyi, G., Laczi, M., Nagy, G., Szász, E., Kötél, D., Török, J. (2015). Stable correlation structure among multiple plumage colour traits: can they work as a single signal? Biological Journal of the Linnean Society 114:92-108.
Garamszegi, L.Z., Mueller, J.C., Markó, G., Szász, E., Zsebők, S., Herczeg, G., Eens, M., Török, J. (2014). The relationship between DRD4 polymorphisms and phenotypic correlations of behaviors in the collared flycatcher. Ecology and Evolution 4:1466-1479. (open access)
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)
Szász, E., Kiss, D., Rosivall, B. (2012). Sex ratio adjustment in birds. Ornis Hungarica 20(1):26-36.

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