Population dynamics; Rock-Paper-Scissors Game; Frequency Dependent Selection; Sexual Selection; Coloration; Populations Experiments; Common Lizard; Lacerta vivipara; Lacerta (Zootoca) vivipara; Frequency-Dependent Selection
San-Jose L.M. Peñalver-Alcázar M. Milá B. Gonzalez-Jimena V. Fitze P.S. (2014), Cumulative frequency-dependent selective episodes allow for rapid morph cycles and rock-paper-scissors dynamics in species with overlapping generations, in Proceedings of the Royal Society. B Biological Sciences
, 281(1788), 20140976.
Fitze P.S. Gonzalez Jimena V. San-Jose L.M. Heulin B. Sinervo B. (2014), Frequency-dependent sexual selection with respect to offspring fitness returns is consistent with predictions from rock-paper-scissors dynamics in the European common lizard, in Frontiers in Ecology and Evolution
, 2, 1 / 77-11.
Aragon P Fitze P.S (2014), Geographical and temporal body size variation in a reptile: roles of sex, ecology, phylogeny and ecology structured in phylogeny, in PLoS One
, 9(8), e104026.
Huyghe K. San-Jose L. Peñalver M. Fitze P.S. (2013), An ecomorphological analysis of the determinants of mating success., in Biological Journal of the Linnean Society
, 110, 658-664.
San-Jose L.M. Fitze P.S. (2013), Corticosterone regulates multiple colour traits in Lacerta [Zootoca] vivipara males, in Journal of evolutionary biology
, 26, 2681-2690.
Romero-Diaz C Richner H Granado-Lorencio F Tschirren B Fitze PS (2013), Independent sources of condition dependency and multiple pathways determine a composite trait: lessons from carotenoid-based plumage colouration, in Journal of Evolutionary Biology
, 26, 635-646.
San Jose L Granado-Lorenico F. Sinervo B. Fitze P.S. (2013), Iridophores and not carotenoids account for chromatic variation of carotenoid-based coloration in common lizards (Lacerta vivipara)., in American Naturalist
, 181, 396-409.
Horáthová T. Cooney C.R. Fitze P.S. Oksanen T.A. Jelic D. Ghira I. Uller T. Jandzik D. (2013), Length of activity season drives geographic variation in body size of widely distributed lizard., in Ecology and Evolution
, 3, 2424-2442.
Milá B. Surget-Groba Y. Heulin B. Gosá A. Fitze P.S (2013), Multilocus phylogeography of the common lizard Zootoca vivipara at the Ibero-Pyrenean suture zone reveals lowland barriers and high-elevation introgression., in BMC Evolutionary Biology
, 13, 192.
Bleu J. Le Galliard J.-F. Fitze P. S. Meylan S. Clobert J. Massot M. (2013), Reproductive allocation strategies: a long-term study on proximate factors and temporal adjustments in a viviparous lizard., in Oecologia
, 171, 141-151.
Gonzalez-Jimena V, Fitze PS (2012), Blood corticosterone levels and intersexual selection games: best-of-bad-job strategies of male common lizards, in Behavioral Ecology and Sociobiology
, 66, 162-169.
Aragón Pedro (2012), Can we disentangle predator-prey interactions from species distributions at a macro-scale? A case study with a raptor species, in Oikos
, 122, 64-72.
San Jose L. Granado F. Fitze PS. (2012), Dietary lipids reduce the expression of carotenoid-based coloration in Lacerta vivipara., in Functional Ecology
, 26(3), 646-656.
Baselga Andrés (2012), Dispersal ability modulates the strength of the latitudinal richness gradient in European beetles, in Global Ecology and Biogeography
, 21, 1106-1113.
San Jose LM Gonzalez-Jimena V Fitze PS (2012), Patterns of phenotypic variation reveal substantial differentiation in sexual dimorphism of three Psammodromus (Squamata, Lacertidae) species, in Contributions to Zoology
, 81, 181-197.
Aragón Pedro (2012), Predicted effect of climate change on the invisibility and distribution of the Western corn root-worm, in Agricultural and Forest Entomology
, 14, 13-18.
San-Jose Luis Martin, Granado-Lorencio Fernando, Fitze Patrick S. (2012), VITAMIN E, VITAMIN A, AND CAROTENOIDS IN MALE COMMON LIZARD TISSUES, in Herpetologica
, 68(1), 88-99.
Fitze PS, Le Galliard JF (2011), Inconsistency between Different Measures of Sexual Selection, in AMERICAN NATURALIST
, 178(2), 256-268.
Bleu J, Le Galliard J-F, Meylan S, Massot M, Fitze PS (2011), Mating does not influence reproductive investment, in a viviparous lizard, in Journal of Experimental Zoology Part A: Ecological Genetics and Physiology
, 315 A(8), 458-464.
Breedveld MC Fitze PS, A matter of time: delayed mate encounter postpones mating window initiation and reduces the strength of female choosiness, in Behavioral Ecology and Sociobiology
Peñalver-Alcázar M Romero-Diaz C Fitze PS, Communal egg-laying in oviparous Zootoca vivipara louislantzi of the Central Pyrenees, in Herpetology Notes
Rock-paper-scissors (RPS) social systems have been suggested to lead to socially mediated speciation, potentially leading to big radiations. While RPS social systems have previously been thought to be limited to a few special cases (e.g. Uta stansburiana), accumulating evidence indicates that rock-paper-scissors (RPS) social systems are far more widespread than previously thought (Sinervo & Calsbeek, 2006). RPS social systems are nowadays described in reptiles (e.g. Uta stansburiana, Lacerta vivipara), fish (Cyclids), insects (e.g. Ischnura elegans), isopodes (e.g. Paracerceis sculpta), plants (Lythrum salicaria), bacteria (E. coli) (Kerr et al., 2002; Sinervo & Calsbeek, 2006), and even between different species and levels of biological organization (Sinervo & Calsbeek, 2006). Most RPS social systems are suggested to arise due to frequency-dependent selection (FDS). For example, the RPS social systems described in two lizard species, are based on a male colour-polymorphism, which is linked to male reproductive strategy. In both systems it is suggested that the observed male colour-morph frequency cycles are driven by negative frequency-dependent selection (nFDS) arising due to sexual selection. While in Uta stansburiana mainly male-male competition among male colour-morphs explains the observed male colour-morph cycles, a theoretical model in Lacerta vivipara suggested that both male-male competition and context-dependent female mate choice might drive the cycles. However, nFDS may not necessarily arise due to sexual selection. It may also arise due to survival selection (e.g. predators, disease, habitat characteristics,..). Theoretical models showed that the latter might lead to rapid speciation, and they suggest that nFDS due to sexual selection will generally slow the speciation process, except under a few special circumstances (van Doorn et al., 2004). Despite the theoretically predictions and the long recognized importance of FDS selection for maintaining polymorphisms, few experimental evidence exists that unravelled the mechanisms potentially maintaining polymorphisms and it is even less clear how nFDS arises. Thus, the importance of RPS social systems in driving the evolution of colour polymorphisms and speciation is unclear.In this project we will experimentally demonstrate which mechanisms lead to FDS and to the observed male colour-morph cycling. More specifically, we will investigate whether sexual selection through male-male competition and context-dependent female mate choice affect the population dynamics of the common lizard. The results of the proposed project will also unravel whether the basic assumptions of the evolutionary models linking RPS social systems to rapid speciation are met (van Doorn et al., 2004), or whether RPS social systems may hinder speciation (Gray & McKinnon, 2007). The project involves several approaches ranging from laboratory experiments to the study of natural populations and to the experimental manipulation of semi-natural populations, all of which were successfully used in the past by the principal investigator. Some experiments will be conducted at University of Lausanne, while other experiments will be conducted in the Pyrenees at the Instituto Pirenaico de Ecología, where the principal investigator built an experimental system consisting of sixteen independent semi-natural populations.