Dr Tanmay Dixit
Tanmay was brought up in the UK and was fascinated by wildlife and birds from an early age. His passion for brood parasitism, ornithology, and animal behaviour was inspired by his love of natural history. This fascination with natural history, alongside his interest in how species interact in life’s complex web led to him studying Natural Sciences at the University of Cambridge. During and after Tanmay’s undergraduate degree, he conducted projects across the world, including in the neotropics (Panama and Trinidad), and in Africa. He became fascinated by coevolution and specifically the interactions between brood parasites and their hosts, which he now studies.
Tanmay began his PhD research with Prof. Claire Spottiswoode in October 2018, studying the antagonistic interactions between cuckoo finches Anomalospiza imberbis and their hosts (family Cisticolidae) in Zambia. He collaborated with mathematicians and computer scientists such as Prof. L Mahadevan (Harvard) and Dr. Christopher Town (Cambridge) to use top-down and bottom-up approaches in studying the evolution of egg signatures and forgeries. In particular, he studied the perception and evolution of egg pattern complexity and imperfect mimicry to ask whether birds behave as optimally as we might (or might not!) do in their place.
In October 2023, he began a Junior Research Fellowship at Jesus College, Cambridge. He continues to study cuckoo finches and their hosts, now focussing on mechanisms underpinning coevolution. He is particularly interested in whether perception of egg colours and patterns is continuous or categorical, and how cuckoo finches respond to host perceptual capabilities and phenotypic distributions.
Tanmay’s focus on mechanisms and their effects on evolution requires cross-disciplinary approaches to studying both adaptation and maladaptation, and he particularly enjoys the collaborations with researchers across a range of fields. Nevertheless, he is particularly delighted to be able to pursue scientific questions in the beautiful setting of Zambia’s miombo woodland.
Publications
Dixit, T., Lund, J., Fulford, A.J.C., Apostol, A.L., Chen, K.-C., Tong, W., Feeney, W.E., Hamusikili, L., Colebrook-Robjent, J.F.R., Town, C.P. and Spottiswoode, C.N. (2023). Chase-away evolution maintains imperfect mimicry in a brood parasite–host system despite rapid evolution of mimics. Nature Ecology & Evolution. https://doi.org/10.1038/s41559-023-02232-4
Dixit, T., Chen, K.C., Stoddard, M.C., Mahadevan, L., Town, C.P. and Spottiswoode, C.N., 2023. Repeatable randomness, invariant properties, and the design of biological signatures of identity. Evolution 77(10), 2224-2233. https://doi.org/10.1093/evolut/qpad134
Lund, J., Dixit, T., Attwood, M.C., Hamama, S., Moya, C., Stevens, M., Jamie, G.A. and Spottiswoode, C.N., 2023. When perfection isn’t enough: host egg signatures are an effective defence against high-fidelity African cuckoo mimicry. Proceedings of the Royal Society B. 290: 20231125. https://doi.org/10.1098/rspb.2023.1125
McClelland, S.C., Attard, M.R.G., Bowen, J, Horrocks, N.P.C., Jamie, G.A., Dixit, T., Spottiswoode, C.N., Portugal, S.J., 2023. Eggshell composition and surface properties of avian brood-parasitic species compared with non-parasitic species. Royal Society Open Science 10: 221023. https://doi.org/10.1098/rsos.221023
Dixit, T., Choi, G.P.T., al-Mosleh, S., Lund, J., Troscianko, J., Moya, C., Mahadevan, L. and Spottiswoode, C.N., 2023. Combined measures of mimetic fidelity explain imperfect mimicry in a brood parasite–host system. Biology Letters 19(2), 20220538 https://doi.org/10.1098/rsbl.2022.0538
Dixit, T., Apostol, A., Chen, K.C., Fulford, A., Town, C.P. and Spottiswoode, C.N. (2022). Visual complexity of egg patterns predicts egg rejection according to Weber’s Law. Proceedings of the Royal Society B: Biological Sciences 289. 20220710. https://doi.org/10.1098/rspb.2022.0710
Cram, D.L., van der Wal, J.E.M., Uomini, N.T., Cantor, M., Afan, A.I., Attwood, M.C., Amphaeris, J., Balasani, F., Blair, C.J., Bronstein, J.L., Buanachique, I.O., Cuthill, R.R.T., Das, J., Daura-Jorge, F.G., Deb, A., Dixit, T., Dlamini, G.S., Dounias, E., Gedi, I.I., Gruber, M., Hoffman, L.S., Holzlehner, T., Isack, H.A., Laltaika, A.E., Lloyd-Jones, D.J., Lund, J., Machado, A.M.S., Mahadevan, L., Moreno, I.B., Nwaogu, C.J., Pereira, V.L., Pierotti, R., Rucunua, S.A., dos Santos, W.F., Serpa, N., Smith, B.D., Sridhar, H., Tolkova, I., Tun, T., Valle-Pereira, J.V.S., Wood, B.M., Wrangham, R.W. and Spottiswoode, C.N. 2022 The ecology and evolution of human-wildlife cooperation. People and Nature https://doi.org/10.1002/pan3.10369
van der Wal, J.E.M., Spottiswoode, C.N., Uomini, N.T., Cantor, M., Daura-Jorge, F.G., Afan, A.I., Attwood, M.C., Amphaeris, J., Balasani, F., Begg, C.M., Blair, C.J., Bronstein, J.L., Buanachique, I.O., Cuthill, R.R.T., Das, J., Deb, A., Dixit, T., Dlamini, G.S., Dounias, E., Gedi, I.I., Gruber, M., Hoffman, L.S., Holzlehner, T., Isack, H.A., Laltaika, A.E., Lloyd-Jones, D.J., Lund, J., Machado, A.M.S., Mahadevan, L., Moreno, I.B., Nwaogu, C.J., Pereira, V.L., Pierotti, R., Rucunua, S.A., dos Santos, W.F., Serpa, N., Smith, B.D., Tolkova, I., Tun, T., Valle-Pereira, J.V.S., Wood, B.M., Wrangham, R.W. and Cram, D.L. 2022 Safeguarding human-wildlife cooperation. Conservation Letters e12886 https://doi.org/10.1111/conl.12886
McClelland, S.C., Reynolds, M., Cordall, M., Hauber, M.E., Goymann, W., McClean, L.A., Hamama, S., Lund, J., Dixit, T., Louder, M.I.M., Safari, I., Honza, M., Spottiswoode, C.N. and Portugal, S.J. 2021. Embryo movement is more frequent in avian brood parasites than birds with parental reproductive strategies. Proceedings of the Royal Society B 288: 20211137. https://doi.org/10.1098/rspb.2021.1137
Dixit, T., Caves, E.M., Spottiswoode, C.N. and Horrocks, N.P.C. (2021) Why and how to apply Weber’s Law to coevolution and mimicry. Evolution 75: 1906-1919. https://doi.org/10.1111/evo.14290
Caves, E.M., Dixit, T., Colebrook-Robjent, J.F.R., Hamusikili, L., Stevens, M., Thorogood, R. and Spottiswoode, C.N. (2021) Hosts elevate either within-clutch consistency or between-clutch distinctiveness of egg phenotypes in defence against brood parasites. Proceedings of the Royal Society of London B 288: 20210326. https://doi.org/10.1098/rspb.2021.0326
Dixit, T.*, Riederer, J.M.*, Quek, S., Belford, K., Tavares de Wand, T., Sicat, R. and Jiggins, C.D. (2020) Plasticity in flower size as an adaptation to variation in pollinator specificity. Ecological Entomology 45: 1367-1372. https://doi.org/10.1111/een.12921
Sorensen, M.C., Dixit, T., Newton, J., Kardynal, K., Hobson, K., Bensch, S., Jenni-Eiereman, S. and Spottiswoode, C.N. (2019) Migration distance does not predict blood parasitism in a Palearctic-African migratory bird. Ecology and Evolution 9: 8294-8304. https://doi.org/10.1002/ece3.5404
Pickup, M., Brandvain, Y., Fraïsse, C., Yakimowski, S., Barton, N.H., Dixit, T., Lexer, C., Cereghetti, E. and Field, D.L. (2019) Mating system variation in hybrid zones: facilitation, barriers and asymmetries to gene flow. New Phytologist 224: 1035-1047. https://doi.org/10.1111/nph.16180
Dixit, T., English, S. and Lukas, D. (2017), The relationship between egg size and helper number in cooperative breeders: a meta-analysis across species. PeerJ 5: e4028. https://doi.org/10.7717/peerj.4028