Ivanović, A., Cvijanović, M., Denoël, M., Slijepčević, M., & Kalezić, M. L. (2014). Facultative paedomorphosis and the pattern of intra- and interspecific variation in cranial skeleton: lessons from European newts (Ichthyosaura alpestris and Lissotriton vulgaris). Zoomorphology, 133(1), 99-109.
Paedomorphosis, the presence of ancestral larval and juvenile traits that occur at the descendent adult stage, is an evolutionary phenomenon that shaped morphological evolution in many vertebrate lineages ...
Winandy, L., & Denoël, M. (2013). Introduced goldfish affect amphibians through inhibition of sexual behaviour in risky habitats: an experimental approach. PLoS ONE, 8(11), 82736.
The introduction of alien species is one of the major causes of current and global biodiversity loss. The introduction of fish can be a particular threat to native amphibian populations, which are declining ...
Winandy, L., & Denoël, M. (2013). Cues from introduced fish alter shelter use and feeding behaviour in adult alpine newts. Ethology, 119(2), 121-129.
Amphibians are particularly affected by alien fish introductions and are declining worldwide. However, the behavioural mechanisms behind the observed cases of coexistence and exclusion patterns between adult ...
Denoël, M. (2012). Newt decline in Western Europe: highlights from relative distribution changes within guilds. Biodiversity & Conservation, 21(11), 2887-2898.
The recent increase in the number of monitoring schemes has formed the basis for high quality distribution atlases. This provides the opportunity of estimating global and specific decline patterns across ...
Kopecky, O., Vojar, J., & Denoël, M. (2011). Sex-specific effect of pool desiccation on the movement of Alpine newts, Mesotriton alpestris (Laurenti, 1768), among breeding sites (Caudata: Salamandridae). Herpetozoa, 24(3/4), 127-134.
In unpredictable habitats, it is advantageous to amphibians to reduce the risk of weather-induced offspring mortality by utilization of several reproductive patches. In european deciduous forest landscapes ...
Winandy, L., & Denoël, M. (2011). The use of visual and automatized behavioral markers to assess methodologies: a study case on PIT-tagging in the Alpine newt. Behavior Research Methods, 43(2), 568-576.
Biomarkers are now widely used as tools in various research fields to assess individual integrity. The recent advances in quantification methods of behavioral patterns, such as computerized video-tracking ...
Denoël, M., & Doellen, J. (2010). Displaying in the dark: light-dependent alternative mating tactics in the Alpine newt. Behavioral Ecology and Sociobiology, 64(7), 1171-1175.
Environment plays a major role for determining the kind of courtship behaviours or alternative mating tactics employed, but the effect of physical variables on fitness has received little attention. The Alpine ...
Kopecky, O., Vojar, J., & Denoël, M. (2010). Movements of Alpine newts (Mesotriton alpestris) between small aquatic habitats (ruts) during the breeding season. Amphibia-Reptilia, 31(1), 109-116.
Many species with complex life cycles, such as caudate amphibians, migrate from terrestrial to aquatic habitats for reproduction. However, movements between reproductive ponds within a breeding season have ...
Denoël, M., Ficetola, G. F., Cirovic, R., Radovic, D., Dzukic, G., Kalezic, M. L., & Vukov, T. D. (2009). A multi-scale approach to facultative paedomorphosis of European newts (Salamandridae) in the Montenegrin karst: Distribution pattern, environmental variables, and conservation. Biological Conservation, 142(3), 509-517.
Facultative paedomorphosis, a process in which newt larvae can opt for reproduction before or after metamorphosis, is geographically heterogeneous. Despite numerous ecological studies and recent evidence of ...
Denoël, M., Ivanovic, A., Dzukic, G., & Kalezic, M. (2009). Sexual size dimorphism in the evolutionary context of facultative paedomorphosis: insights from European newts. BMC Evolutionary Biology, 9, 278.
BACKGROUND:Sexual size dimorphism (SSD) is a key evolutionary feature that has been studied in many organisms. In a wide range of species, this pattern is more complex because of polymorphism within each sex ...
Denoël, M., & Demars, B. (2008). The benefits of heterospecific oophagy in a top predator. Acta Oecologica: International Journal of Ecology, 34(1), 74-79.
Oophagy is a behavioural pattern that has been found in a large variety of predator species in the animal kingdom. In contrast to other modes of feeding, it is peculiar in that it involves the detection ...
Denoël, M., & Ficetola, G. F. (2008). Conservation of newt guilds in an agricultural landscape of Belgium: the importance of aquatic and terrestrial habitats. Aquatic Conservation, 18(5), 714-728.
1. Amphibians are declining worldwide in response to local and global pressures. Pond-breeding species are particularly vulnerable to environmental change because they rely on two components of the landscape ...
Denoël, M. (2007). Le Triton alpestre, Triturus alpestris (Laurenti, 1768). In J.-P., Jacob, C., Percsy, H., de Wavrin, E., Graitson, T., Kinet, M., Denoël, M., Paquay, N., Percsy, & A., REmacle (Eds.), Amphibiens et Reptiles de WAllonie (pp. 62-71). Namur, Belgique: Aves-Raînne et Centre de Recherche de la Nature, des Forêts et du Bois (MRW - DGRNE).
Denoël, M., & Ficetola, G. F. (2007). Landscape-level thresholds and newt conservation. Ecological Applications, 17(1), 302-309.
Ecological thresholds are defined as points or zones at which a rapid change occurs from one ecological condition to another. The existence of thresholds in species - habitat relationships has important ...
Denoël, M., Lena, J.-P., & Joly, P. (2007). Morph switching in a dimorphic population of Triturus alpestris (Amphibia, Caudata). Evolutionary Ecology, 21(3), 325-335.
The usual life cycle of Alpine newts comprises an aquatic larval stage and a terrestrial juvenile and adult stage. However, some populations differ from this pattern in exhibiting facultative paedomorphosis ...
Denoël, M. (2005). Persistence and dispersion of an introduced population of Alpine Newt (Triturus alpestris) in the limestone plateau of Larzac (Southern France). Revue d'Ecologie (La Terre et la Vie), 60(2), 139-148.
Persistence and dispersion of an introduced population of Alpine Newt (Triturus alpestris) in the limestone plateau of Larzoc (southern France). - The study of introduced populations is interesting to better ...
Denoël, M., Džukić, G., & Kalezic, M. L. (2005). Effects of widespread fish introductions on paedomorphic newts in Europe. Conservation Biology, 19(1), 162-170.
As a result of factors such as global warming, habitat destruction, and species introduction, amphibians are declining worldwide. No one, however, has analyzed the status of polymorphic amphibian species at a ...
Denoël, M., Hector, M.-P., & Poncin, P. (2005). Courtship behavior in the Alpine newt Triturus alpestris at two different densities of males. Herpetologica, 61(4), 373-379.
The aim of this laboratory experiment was to examine courtship behavior and reproductive success under two different perceived male densities ill the Alpine newt (Triturus alpestris). Male behavioral patterns ...
Denoël, M., Mathieu, M., & Poncin, P. (2005). Effect of water temperature on the courtship behavior of the Alpine newt Triturus alpestris. Behavioral Ecology and Sociobiology, 58(2), 121-127.
Temperature is expected to have an effect on the behavioral patterns of all organisms, especially ectotherms. However, although several studies focused on the effect of temperature on acoustic displays in both ...
Denoël, M. (2004). Distribution and characteristics of aquatic habitats of newts and yellow-bellied toads in the district of Ioannina (Epirus, Greece). Herpetozoa, 17(1/2), 49-64.
The study describes the aquatic habitats and distribution of Triturus alpestris veluchiensis Wolterstorff 1935, T. carnifex macedonicus (Karaman, 1922), T. vulgaris graecus (Wolterstorff, 1905) and Bombina ...
Denoël, M. (2004). Feeding performance in heterochronic alpine newts is consistent with trophic niche and maintenance of polymorphism. Ethology, 110(2), 127-136.
The feeding performances of two heterochronic morphs of the Alpine newt Triturus alpestris were investigated in laboratory experiments. Although both morphs are able to feed in the aquatic habitat, the ...
Denoël, M. (2004). Répartition, habitat et conservation des amphibiens du Pays de Herve. Bulletin de la Société Herpétologique de France, 111-112, 49-77.
The knowledge of distribution and ecological determinants of species is a prerequisite to their conservation at a time where declines are generalized at a world scale. The aim of this study is to characterize ...
Denoël, M. (2004). Terrestrial versus aquatic foraging in juvenile Alpine newts (Triturus alpestris). Ecoscience, 11(4), 404-409.
Many species of newts and salamanders forage in both terrestrial and aquatic environments during their life. However, the relative benefits of the two foraging patterns remain unknown because all previous ...
Denoël, M., Schabetsberger, R., & Joly, P. (2004). Trophic specialisations in alternative heterochronic morphs. Naturwissenschaften (Die), 91(2), 81-84.
Polymorphisms are suspected of reducing competition among conspecifics in heterogeneous environments by allowing differential resource use. However the adaptive significance of alternative morphs has been ...
Denoël, M. (2003). How do paedomorphic newts cope with lake drying? Ecography, 26(4), 405-410.
Paedomorphosis, in which adult individuals retain larval traits, is widespread in newts and salamanders. Most evolutionary models predict the maintenance of this life-history trait in favourable aquatic ...
Denoël, M. (2003). Effect of rival males on the courtship of paedomorphic and metamorphic Triturus alpestris (Amphibia : Salamandridae). Copeia, 2003(3), 618-623.
Current theories on the alternative mating tactics suppose that individuals may opt for particular behavioral patterns depending of their morphological status. Facultative paedomorphosis in newts and ...
Denoël, M., & Andreone, F. (2003). Trophic habits and aquatic microhabitat use in gilled immature, paedomorphic and metamorphic Alpine newts (Triturus alpestris apuanus) in a pond in central Italy. Belgian Journal of Zoology, 133(2), 95-102.
Current evolutionary models suggest that the presence of heterogeneous habitats favours the evolution of polymorphisms. In such cases, alternative phenotypes can coexist because they use different resources ...
Denoël, M., & Schabetsberger, R. (2003). Resource partitioning in two heterochronic populations of Greek Alpine newts, Triturus alpestris veluchiensis. Acta Oecologica: International Journal of Ecology, 24(1), 55-64.
Current ecological models suggest that the maintenance of trophic polymorphisms is favoured by a different resource use in alternative morphs. Facultative paedomorphosis in newts is an example of phenotypic ...
Denoël, M. (2002). Paedomorphosis in the Alpine newt (Triturus alpestris): decoupling behavioural and morphological change. Behavioral Ecology and Sociobiology, 52(5), 394-399.
Paedomorphosis is a heterochronic pattern leading to morphological change, i.e. retention of larval characters in the adult phenotype. The aim of this study was to find out whether behaviour and morphology are ...
Denoël, M., Hervant, F., Schabetsberger, R., & Joly, P. (2002). Short- and long-term advantages of an alternative ontogenetic pathway. Biological Journal of the Linnean Society, 77(1), 105-112.
We documented hypotheses on the evolution of developmental heterochronies by estimating short- and long-term advantages of alternative morphs. In this respect, we compared food energy intakes and body ...
Denoël, M., & Poncin, P. (2001). The effect of food on growth and metamorphosis of paedomorphs in Triturus alpestris apuanus. Archiv für Hydrobiologie, 152(4), 661-670.
The effect of food level on growth and metamorphosis of paedomorphs was examined in an experimental replicated design in Triturus alpestris apuanus. Paedomorphosis concerns the retention of larval ...
Denoël, M., Duguet, R., Džukić, G., Kalezic, M., & Mazzotti, S. (2001). Biogeography and ecology of paedomorphosis in Triturus alpestris (Amphibia, Caudata). Journal of Biogeography, 28(10), 1271-1280.
Aim Paedomorphosis is an evolutionary change in which larval structures are retained in adult animals. In newts and salamanders, this heterochronic process is widely represented and concerns the retention of ...
Denoël, M., & Joly, P. (2001). Adaptive significance of facultative paedomorphosis in Triturus alpestris (Amphibia, Caudata): resource partitioning in an alpine lake. Freshwater Biology, 46(10), 1387-1396.
1. Facultative paedomorphosis is a polymorphism that has important evolutionary implications in promoting morphological differentiation and variation in habitat use. It occurs in several urodele species ...
Denoël, M., & Joly, P. (2001). Size-related predation reduces intramorph competition in paedomorphic Alpine newts. Canadian Journal of Zoology, 79(6), 943-948.
Evolutionary theory assumes that facultative paedomorphosis in newts and salamanders is adaptive in allowing either a younger age at maturity or resource partitioning between the heterochronic morphs. In newt ...
Denoël, M., Poncin, P., & Ruwet, J.-C. (2001). Alternative mating tactics in the alpine newt Triturus alpestris alpestris. Journal of Herpetology, 35(1), 62-67.
Sexual behaviors in dyadic encounters in the alpine newt, Triturus alpestris alpestris, is described to test whether male behavior is influenced by external cues, that is, female responsiveness. Depending on ...
Denoël, M., Poncin, P., & Ruwet, J.-C. (2001). Sexual compatibility between two heterochronic morphs in the Alpine newt, Triturus alpestris. Animal Behaviour, 62(3), 559-566.
Paedomorphosis, in which individuals retain ancestral characteristics in the adult stage, is widespread in newts and salamanders and is suspected to play an important role in evolution. In some species ...
Denoël, M., & Joly, P. (2000). Neoteny and progenesis as two heterochronic processes involved in paedomorphosis in Triturus alpestris (Amphibia: Caudata). Proceedings of the Royal Society B : Biological Sciences, 267(1451), 1481-1485.
Current theories on the evolution of paedomorphosis suppose that several ontogenetic pathways have appeared according to different selective pressures. The aim of this study was to find out whether two ...
Denoël, M. (1998). The modulation of movement as a behavioral adaptation to extreme environments in the newt Triturus alpestris cyreni. Journal of Herpetology, 32, 623-625.
Denoël, M. (1997). Un cas de néoténie dans un bâtiment désaffecté, chez le Triton alpestre, Triturus alpestris apuanus (Salamandridae). Alytes, 15, 99-103.
A population of Triturus alpestris apuanus of the Apuane Alps (Tuscany , Italy) was studied during July 1994. The particularity of this population is that it breeds in an artificial site, in the dark and under ...
Denoël, M. (1996). Etude comparée du comportement de cour de Triturus alpestris alpestris (Laurenti, 1768) et Triturus alpestris cyreni (Wolterstorff, 1932) : approche évolutive. Liège, Belgique: Cahiers d'Ethologie.
The species concept in the animal world is very abstract. With diverse methods scientists try to place boundaries between species. But this is generally theoretical. Indeed species are in continuous evolution ...