Degrees:
– MSc in Biology (1999, Eötvös Loránd University)
– PhD in Ecology (2003, Eötvös Loránd University)
Position: associate professor
E-mail: gergely.hegyi@ttk.elte.hu
Phone: +36-1-372-2500/8765
Research interests
- Sexual signals in birds: information content and role, structural colours, multiple signal systems, microevolution, comparative studies.
- Developmental plasticity in birds: compensatory growth in passerines, the proximate determinants and fitness consequences of nestling growth trajectories.
- Life history evolution in birds: individual optimization, interpretation of fitness-related traits, evolution of mating preferences.
Publications:
Jablonszky, M., Canal, D., Hegyi, G, Herényi, M., Laczi, M., Markó, G., Nagy, G., Rosivall, B., Szöllősi, E., Török, J., Garamszegi, L. Z. (2024). The estimation of additive genetic variance in body size in a wild passerine is sensitive to the method used to estimate relatedness among the individuals. Ecology and Evolution 14:e10981. (DOI: 10.1002/ece3.10981)
Hegyi, G., Laczi, M., Szabó, G., Sarkadi, F., Török, J. (2023). Plumage color degradation indicates reproductive effort: an experiment. Scientific Reports 13:18770. (DOI: 10.1038/s41598-023-45348-0)
Laczi, M., Herczeg, G., Szabó, G., Gyarmathy, H., Sarkadi, F., Török, J., Hegyi, G. (2023). The great tit abdominal stripe contains a sexually dichromatic colour patch hidden from the human eye. Frontiers in Ecology and Evolution 11:1263974. (DOI: 103389/fevo.2023.1263974)
Jablonszky, M., Canal, D., Hegyi, G., Herényi, M., Laczi, M., Lao, O., Markó, G., Nagy, G., Rosivall, B., Szász, E., Török, J., Zsebők, S., Garamszegi, L. Z. (2022). Estimating heritability of song considering within-individual variation in a wild songbird: the collared flycatcher. Frontiers in Ecology and Evolution 10: 975687
Laczi, M., Jablonszky, M., Markó, G., Nagy, G., Szabó, Gy., Zsebők, S., Török, J., Hegyi, G. (2022). White plumage color as an honest indicator: feather macrostructure links reflectance with reproductive effort and success. Behavioral Ecology and Sociobiology 76:125.
Hegyi, G., Laczi, M., Herényi, M., Markó, G., Nagy, G., Rosivall, B., Szász, E., Török, J. (2022). Functional integration of multiple sexual ornaments: signal coherence and sexual selection. American Naturalist 200:486-505. (DOI: :10.1086/720620)
Jablonszky, M., Canal, D., Hegyi, G., Krenhardt, K, Laczi, M., Markó, G., Nagy, G., Rosivall, B., Szász, E., Zsebők, S., Garamszegi, L.Z. (2022). Individual differences in song plasticity in response to social stimuli and singing position. Ecology and Evolution 12:e8883. (DOI: 10.1002/ece3.8883)
Laczi, M., Kopena, R., Sarkadi, F., Kötél, D., Török, J., Rosivall, B., Hegyi, G. (2021). Triparental care in the collared flycatcher (Ficedula albicollis): cooperation of two females with a cuckolded male in rearing a brood. Ecology and Evolution 11:10754-10760. (DOI: 10.1002/ece3.7923)
Laczi, M., Balogh, J., Nardou, X., Török, J., Hegyi, G. (2021). The meaning of purely structural colour: white plumage reflectance indicates feather condition. Ibis 163:407-416. (DOI: 10.1111/ibi.12902)
Culina, A. et al. (2020). Connecting the data landscape of long-term ecological studies: The SPI-birds data hub. Journal of Animal Ecology 90:2147-2160. (DOI: 10.1111/1365-2656.13388)
Szabó, Gy., Boross, N., Garamszegi, L.Z., Hegyi, G., Jablonszky, M., Krenhardt, K., Laczi, M., Markó, G., Szász, E., Török, J. (2020). Correlation between physiology and behavioural traits in a wild passerine. (in Hungarian with English abstract). Állattani Közlemények 105:71-84.
Zsebők, S., Herczeg, G., Laczi, M., Nagy, G., Vaskuti, É., Hargitai, R., Hegyi, G., Herényi, M., Markó, G., Rosivall, B., Szász, E., Szöllősi, E., Török, J., Garamszegi, L.Z. (2020). Sequential organization of birdsong: relationships with individual quality and fitness traits in collared flycatcher (Ficedula albicollis). Behavioral Ecology 32:82-93 (DOI: 10.1093/beheco/araa104)
Hegyi, G., Laczi, M., Kötél, D., Csörgő, T. (2020). Melanin-based ornament darkness positively correlates with across-season nutritional condition. Ecology and Evolution 10:13084-13097. (DOI: 10.1002/ece3.6898)
Jablonszky, M., Krenhardt, K., Markó, G., Szász, E., Hegyi, G., Herényi, M., Kötél, D., Laczi, M., Nagy, G., Rosivall, B., Török, J., Garamszegi, L.Z. (2020). A behavioural trait displayed in an artificial novel environment correlates with dispersal in a wild bird. Ethology 126:540-552. (DOI: 10.1111/eth.13005)
Laczi, M., Hegyi, G., Nagy, G., Pongrácz, R., Török, J. (2020). Yellow plumage colour of Great Tits Parus major correlates with changing temperature and precipitation. Ibis 162:232-237.
Partecke, J., Hegyi, G., Fitze, P.S., Gasparini, J., Schwabl, H. (2020). Maternal effects and urbanization: Variation of yolk androgens and immunoglobulin in city and forest blackbirds. Ecology and Evolution 10:2213-2224. (DOI: 10.1002/ece3.6058)
Hegyi, G., Jenni-Eiermann, S., Boross, N., Garamszegi, L.Z., Laczi, M., Kötél, D., Krenhardt, K., Jablonszky, M., Markó, G., Nagy, G., Rosivall, B., Szász, E., Török, J. (2019). Ornaments and condition: plumage patch sizes, nutritional reserve state, reserve accumulation and reserve depletion. Behavioral Ecology and Sociobiology 73:89.
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. (2019). When to measure plumage reflectance: a lesson from collared flycatchers Ficedula albicollis. Ibis 161:27-34. (DOI: 10.1111/ibi.12609)
Laczi, M., Garamszegi, L.Z., Hegyi, G., Herényi, M., Ilyés, G., Könczey, R., Nagy, G., Pongrácz, R., Rosivall, B., Szöllősi, E., Tóth, L., Török, J. (2019). Teleconnections and weather orchestrate reproduction of tit species in the Carpathian Basin. Journal of Avian Biology 50:e02179. (DOI: 10.1111/jav.02179)
Laczi, M., Hegyi G., Kötél, D., Csizmadia, T., Lőw, P., Török, J. (2019). Feather reflectance in relation to macro- and nanostructure in the great tit crown. The Biological Journal of the Linnean Society 127:113-124. (DOI: 10.1093/biolinnean/blz016)
Laczi, M., Herényi, M., Hegyi, G., Török, J. (2019). First record of true albinism in a natural population of collared flycatchers Ficedula albicollis. Ardea 107:340-343. (DOI: 10.5253/arde.v107i3.a8)
Nagy, G., Garamszegi, L.Z., Hegyi, G., Herényi, M., Laczi, M., Rosivall, B., Szöllősi, E., Török, J. (2019). Digit ratio predicts the number of lifetime recruits in female collared flycatchers. Biology Letters 15:20190051 (DOI: 10.1098/rsbl.2019.0051)
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.
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.
Laczi, M., Kötél, D., Török, J., Hegyi, G. (2017). Mutual plumage ornamentation and biparental care: consequences for success in different environments. Behavioral Ecology 28:1359-1368.
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.
Nagy, G., Blázi, Gy., Hegyi, G., Török, J. (2016). Side-specific effect of yolk testosterone elevation on second-to-fourth digit ratio in a wild passerine. The Science of Nature 103:4.
Kötél D., Laczi M., Török J., Hegyi G. (2016). Mutual ornamentation and the parental behaviour of male and female Collared Flycatchers Ficedula albicollis during incubation. Ibis 158:796-807.
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.
Hegyi, G., Laczi, M. (2015). Using full models, stepwise regression and model selection in ecological data sets: Monte Carlo simulations. Annales Zoologici Fennici 52:145-159.
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.
Hegyi, G., Kötél, D., Laczi, M. (2015). Direct benefits of mate choice: a meta-analysis of plumage colour and offspring feeding rates in birds. The Science of Nature 102:62.
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.
Hegyi, G., Nagy, G., Török, J. (2013) Reduced compensatory growth capacity in mistimed broods of a migratory passerine. Oecologia 172:279-291.
Markó, G., Azcárate, M., Hegyi, G., Herczeg, G., Laczi, M., Nagy, G., Senar, J.C., Török, J., Garamszegi, L.Z. (2013). Behavioural responses to handling stress in the Great Tit: within-individual consistency and the effect of age, sex and body condition. Ornis Hungarica 21:12-25.
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.
Hargitai, R., Hegyi, G., Török, J. (2012). Winter body condition in relation to age, sex, and plumage ornamentation in a migratory songbird. Ibis 154:410-413.
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.
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., Garamszegi, L.Z. (2011). Using information theory as a substitute for stepwise regression in ecology and behavior. Behavioral Ecology and Sociobiology 65:69-76.
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.
Hettyey, A., Hegyi, G., Puurtinen, M., Hoi, H., Török, J., Penn, D.J. (2010). Mate choice for genetic benefits: time to put the pieces together. Ethology 116:1-9.
Hegyi, G., Schwabl, H. (2010). Do different yolk androgens exert similar effects on the morphology or behaviour of Japanese quail hatchlings (Coturnix japonica)? Journal of Avian Biology 41:258-265.
Hegyi, G., Szöllősi, E., Jenni-Eiermann, S., Török, J., Eens, M., Garamszegi, L.Z. (2010). Nutritional correlates and mate acquisition role of multiple sexual traits in male collared flycatchers. Naturwissenschaften 97:567-576.
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.
Hegyi, G., Møller, A. P., Eens, M., Garamszegi, L.Z. (2009). Prevalence of avian influenza and sexual selection in ducks. Behavioral Ecology 20:1289-1294.
Garamszegi, L.Z., Calhim, S., Dochtermann, N., Hegyi, G., Hurd, P. L., Jørgensen, C., Kutsukake, N., Lajeunesse, M. J., Pollard, K. A., Schielzeth, H., Symonds, M.R.E., Nakagawa, S. (2009). Changing philosophies and tools for statistical inferences in behavioral ecology. Behavioral Ecology 20:1363-1375.
Lakatos, A., Főző, R., Hegyi, G., Török, J. (2008). Tollazati szignálok és anyai hatás vizsgálata széncinegénél (Parus major). Állattani Közlemények 93:17-28.
Hegyi, G., Garamszegi, L. Z., Eens, M. (2008). The roles of ecological factors and sexual selection in the evolution of white wing patches in ducks. Behavioral Ecology 19:1208-1216.
Hegyi, G., Szigeti, B., Laczi, M., Eens, M., Török, J. (2008). Correlated variation of colour between melanin and carotenoid pigmented plumage areas in great tits. Evolutionary Ecology Research 10:559-574.
Hegyi, G., Garamszegi, L. Z., Eens, M., Török, J. (2008). Female ornamentation and territorial conflicts in collared flycatchers (Ficedula albicollis). Naturwissenschaften 95:993-996.
Bádonyi, K., Hegyi, G., Benke, S., Madarász, B., Kertész, Á. (2008). Talajművelési módok agroökológiai összehasonlító vizsgálata. Tájökológiai Lapok 6:145-164.
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)Hettyey, A., Roberts, J.D. (2007). Sperm traits in the frog Crinia georgiana, a species with plastic alternative mating tactics. Behavioral Ecology and Sociobiology 61:1303-1310.
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.
Hargitai, R., Matus, Z., Hegyi, G., Michl, G., Tóth, G., Török, J. (2006). Antioxidants in the egg yolk of a wild passerine: differences between breeding seasons. Comparative Biochemistry and Physiology B 143(2):145-152.
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.