Génétique et Ecologie Evolutive


Chargé de Recherche CNRS


Campus du CNRS
1919, Route de Mende
34293 Montpellier Cedex 05

Tél :  +33 (0) 4 67 61 32 17
Fax : +33 (0) 4 67 61 33 36



I am an evolutionary biologist with main interest in sexual selection. Most of my work focuses on the evolutionary causes and consequences of sex-specific selection. To adress my questions I am primarily using lab experiments, meta-analyses and genomics. Model organisms include birds, flatworms, molluscs, fruit flies, and beetles.

(for more information please visit my personal website)


Academic history

since 2018 CNRS Researcher (Chargé de recherche): Centre d'Ecologie Fonctionelle et Evolutive (CEFE), UMR 5175, Montpellier, France.

2017 – 2018 PostDoc: Evolution, Behaviour and Environment Group School of Life Sciences, University of Sussex, UK. 'Evolutionary genomics of sexual antagonism' with Dr. Ted Morrow.

2014  2016 PostDoc: Centre d'Ecologie Fonctionelle et Evolutive (CEFE), Montpellier, France. 'Evolution of self-fertilization in hermaphrodites: an animal perspective' hosted by Dr. Patrice David & Dr. Philippe Jarne

2011  2014 SNSF PostDoc Fellow: Centre d'Ecologie Fonctionelle et Evolutive (CEFE), Montpellier, France. 'Quantitative genetics of male and female reproduction in a simultanoeus hermaphrodite' hosted by Dr. Patrice David

2010  2011 PostDoc: Zoological Institute, University of Basel, Switzerland. 'Quantitative test of sex allocation theory in a siumultaneous hermaphrodite' hosted by Dr. Lukas Schärer

2007  2010 PhD: Zoological Institute, University of Basel, Switzerland. ’Sex allocation and sexual selection in a simultaneous hermaphrodite’ supervised by Dr. Lukas Schärer and Prof. Dr. Dieter Ebert

2001  2006 Diploma (equivalent to MSc): Institute of Ecology, University of Jena, Germany. ’Communication in Brown Skuas Catharacta antarctica lonnbergi: Functions of multimodal signalling’ supervised by Dr. Hans-Ulrich Peter and Prof. Dr. Stefan Halle

1999  2001 Basic studies in Biology: University of Greifswald, Germany.



(for PDF copies please click here)

Bonel N, Noël E, Janicke T, Sartori K, Chapuis E, Ségard A, Meconcelli S, Pélissié B, Sarda V, David, P (2018). Asymmetric evolutionary responses to sex‐specific selection in a hermaphrodite. Evolution 72: 2181-2201.

Janicke T, Ritchie MG, Morrow EH, and Marie-Orleach L (2018) Sexual selection predicts species richness across the animal kingdom. Proceedings of the Royal Society B: Biological Sciences 285:20180173.

Janicke T, Morrow, EH (2018) Operational sex ratio predicts the opportunity and direction of sexual selection across animals. Ecology Letters 21: 384-391.

Garefalaki ME, Kalyva S, Janicke T, Staikou A (2017). Intraspecific variation in reproductive characters is associated with the strength of sexual selection in the hermaphroditic land snail Cornu aspersum. Behav Ecol Sociobiol 71: 150.

Anthes N, Häderer IK, Michiels NK, Janicke T (2017) Measuring and interpreting sexual selection metrics - evaluation and guidelines. Methods in Ecology and Evolution 8: 918–931.

Janicke T, Sandner P, Ramm SA, Vizoso DB, Schärer L (2016) Experimentally evolved and phenotypically plastic responses to enforced monogamy in a hermaphroditic flatworm. J Evol Biol 29: 1713-1727.

Janicke T, Häderer IK, Lajeunesse MJ, Anthes N (2016) A plea for understanding diversity in sexual selection. Science Advances (E-Letter, 15.04.).

Noël E, Chemtob Y, Janicke T, Sarda V, Pélissié B, Jarne P, and David P (2016) Reduced mate availability leads to evolution of self-fertilization and purging of inbreeding depression in a hermaphrodite. Evolution 70: 625-640.

Marie-Orleach L, Janicke T, Vizoso DB, David P, Schärer L (2016) Quantifying episodes of sexual selection: Insights from a transparent worm with fluorescent sperm. Evolution 70: 314-328.

Janicke T, Häderer IK, Lajeunesse MJ, Anthes N (2016) Darwinian sex roles confirmed across the animal kingdom. Science Advances 2: e1500983.

Janicke T, Chapuis E (2016) Condition-dependence of male and female reproductive success: insights from a simultaneous hermaphrodite. Ecology and Evolution 6: 830-841.

Graham S, Chapuis E, Meconcelli S, Bonel N, Alda P, Sartori S, Christophe A, David P, Janicke T (2015) Size-assortative mating in simultaneous hermaphrodites: an experimental test and a meta-analysis. Behav Ecol Sociobiol 69: 1867-1878.

Janicke T, David P, Chapuis E, (2015) Environment-dependent sexual selection: Bateman's parameters under varying levels of food availability. Am Nat 185: 756-768.

Schärer L, Janicke T, Ramm, SA (2015). Sexual conflict in hermaphrodites. In Rice WR & Gavrilets S (eds). The Genetics and Biology of Sexual Conflict. Cold Spring Harbor Perspectives in Biology. Cold Spring Harbor Press.

Marie-Orleach L, Janicke T, Vizoso DB, Eichmann M, Schärer L (2014) Fluorescent sperm in a transparent worm: validation of a GFP marker to study sexual selection. BMC Evol Biol 14: 148.

Janicke T, Vellnow N, Lamy T, Chapuis E, David P (2014) Inbreeding depression of mating behavior and its reproductive consequences in a freshwater snail. Behav Ecol 25: 288-299.

Janicke T, Marie-Orleach L, De Mulder K, Berezikov E, Ladurner P, Vizoso DB, Schärer L (2013) Sex allocation adjustment to mating group size in a simultaneous hermaphrodite. Evolution 67: 3233–3242.

Janicke T, Vellnow N, Sarda V, David P (2013) Sex-specific inbreeding depression depends on the strength of male-male competition. Evolution 67: 2861-2875.

Roulin A, Routtu J, Hall MD, Janicke T, Colson I, Haag CR, Ebert, D (2013). Local adaptation of sex-induction in a facultative sexual crustacean: insights from QTL mapping and natural populations of Daphnia magna. Mol Ecol 22: 3567-3579.

Marie-Orleach L, Janicke T, Schärer L (2013) Effects of mating status on copulatory and post-copulatory behaviour in a simultaneous hermaphrodite. Anim Behav 85: 453-461.

Janicke T, Kesselring H, Schärer L (2012) Strategic mating effort in a simultaneous hermaphrodite: the role of the partner's feeding status. Behav Ecol Sociobiol 66: 593-601.

Janicke T, Sandner P, Schärer L (2011) Determinants of female fecundity in a simultaneous hermaphrodite: the role of polyandry and food availability. Evol Ecol 25: 203-218.

Janicke T, Schärer L (2010) Sperm competition affects sex allocation but not sperm morphology in a flatworm. Behav Ecol Sociobiol 64: 1367-1375.

Janicke T, Schärer L (2009) Sex allocation predicts mating rate in a simultaneous hermaphrodite. Proc R Soc B-Biol Sci 276:4247-4253.

Schärer L, Janicke T (2009) Sex allocation and sexual conflict in simultaneously hermaphroditic animals. Biol Lett 5:705-708.

Janicke T, Schärer L (2009) Determinants of mating and sperm-transfer success in a simultaneous hermaphrodite. J Evol Biol 22:405-415.

Janicke T, Hahn S (2008) On the performance of brown skua, Catharacta antarctica lonnbergi, vocalizations: reply. Anim Behav 76: E3-E5.

Janicke T, Hahn S, Ritz MS & Peter H-U (2008) Vocal performance reflects individual quality in a non-passerine. Anim Behav 75: 91-98.

Janicke T, Ritz MS, Hahn S, Peter, H-U (2007) Sex recognition in Brown Skuas: Do acoustic signals matter? J Ornithol 148: 565-569.

Hahn S, Reinhardt K, Ritz MS, Janicke T, Montalti D, Peter H-U (2007) Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas. Mar Ecol-Prog Ser 334: 287-297.

Janicke T, Chakarov N (2007) Effect of weather conditions on the communal roosting behaviour of common ravens Corvus corax with unlimited food resources. J Ethol 25: 71-78.

Ritz MS, Hahn S, Janicke T & Peter H-U (2006) Hybridisation between South Polar Skua (Catharacta maccormicki) and Brown Skua (C. antarctica lonnbergi) in the Antarctic Peninsula region. Polar Biol 29: 153-159.