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Sexually antagonistic selection: evidence and proximate mechanisms

Titel Englisch Sexually antagonistic selection: evidence and proximate mechanisms
Gesuchsteller/in Roulin Alexandre
Nummer 135757
Förderungsinstrument Projektförderung (Abt. I-III)
Forschungseinrichtung Département d'Ecologie et d'Evolution Faculté de Biologie et de Médecine Université de Lausanne
Hochschule Universität Lausanne - LA
Hauptdisziplin Oekologie
Beginn/Ende 01.07.2011 - 30.06.2014
Bewilligter Betrag 600'000.00
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Keywords (4)

Melanin-based coloration; Colour polymorphism; Sexually antagonistic selection; Sexual and natural selection

Lay Summary (Englisch)

Lead
Lay summary

Theevolutionary stability of sexual dimorphism is a central issue of sexualselection theory. The usual situation is when males are sexually selected to belarger or more conspicuous, while females are naturally selected to be crypticduring the reproductive period. Sexual dimorphism can also be maintained if theunderlying genes have positive effects in one sex but negative effects in theother sex, a case of intralocus genetic conflict. These genes are often locatedon sex chromosomes because sexually antagonistic selection favours sex-specificgene expression with this gene tending to be less expressed in the sex in whichgene products have negative effects. In this project, I investigate the causesand consequences of sexually antagonistic selection as well as its underlyinggenetic basis. To this end, I am working with the barn owl, a speciesdisplaying a melanin-based colour trait to a larger extent in females than inmales; some of the genes creating variation in this trait are located on the Zsex chromosome as predicted by theory. This model system is appropriate because(i) a dark plumage is positively selected in females and negatively selected inmales, (ii) this plumage trait is associated with many phenotypic attributesand finally (iii) we identified candidate genes potentially implicated in melanogenesisand the expression of the associated phenotypic traits. Our project is timelybecause of the increasing interest in the evolutionary consequences of sexuallyantagonistic selection, the adaptive function of variation in melanin-basedcolour traits, the evolutionary stability of polymorphism and the role ofpleiotropy in evolutionary processes.

 

Direktlink auf Lay Summary Letzte Aktualisierung: 21.02.2013

Verantw. Gesuchsteller/in und weitere Gesuchstellende

Mitarbeitende

Publikationen

Publikation
Barn owl (Tyto alba) breeding biology in relation to breeding season climate
Chausson A., Henry I., Almasi B., Roulin A. (2014), Barn owl (Tyto alba) breeding biology in relation to breeding season climate, in Journal of Ornithology , 155, 273-281.
Divorce in the barn owl: securing a compatible or better mate entails the cost of re-pairing with a less ornamented female mate
Dreiss A. N., Roulin A. (2014), Divorce in the barn owl: securing a compatible or better mate entails the cost of re-pairing with a less ornamented female mate, in Journal of Evolutionary Biology , 27, 1114-1124.
Evolutionary and biomedical consequences of internal melanin
Dubey S., Roulin A. (2014), Evolutionary and biomedical consequences of internal melanin, in Pigment Cell & Melanoma Research , 27, 327-338.
Individual vocal signatures in barn owl nestlings: does individual recognition reinforce the honesty of vocal signalling?
Dreiss A.N., Ruppli C., Roulin A. (2014), Individual vocal signatures in barn owl nestlings: does individual recognition reinforce the honesty of vocal signalling?, in Journal of Evolutionary Biology , 27, 63-75.
Melanin-specific life history strategies
Emaresi G., Bize P., Altwegg R., Henry I., Van den Brink V., Gasparini J., Roulin A. (2014), Melanin-specific life history strategies, in American Naturalist , 183, 269-280.
On estimation and identifiability issues of sex-linked inheritance with a case study of eumelanic spot diameter in Swiss barn owl (Tyto alba).
Thorrud Larsen C., Holland A.M., Jensen H., Steinsland I., Roulin A. (2014), On estimation and identifiability issues of sex-linked inheritance with a case study of eumelanic spot diameter in Swiss barn owl (Tyto alba)., in Ecology and Evolution , 4, 1555-1566.
Proopiomelanocortin gene and melanin-based colour polymorphism in a reptile
Ducrest A.-L., Ursenbacher S., Golay P., Monney J.-P., Mebert K., Roulin A., Dubey S. (2014), Proopiomelanocortin gene and melanin-based colour polymorphism in a reptile, in Biological Journal of the Linnean Society , 111, 160-168.
Quantitative genetic modeling and inference in the presence of non-ignorable missing data
Steinsland I., Thorrud Larsen C., Roulin A., Jensen H. (2014), Quantitative genetic modeling and inference in the presence of non-ignorable missing data, in Evolution , 68, 1735-1747.
Tawny owl Strix aluco as a bioindicator of barn owl Tyto alba breeding and the effect of winter severity on barn owl reproduction
Chausson A., Henry I., Ducret B., Almasi B., Roulin A. (2014), Tawny owl Strix aluco as a bioindicator of barn owl Tyto alba breeding and the effect of winter severity on barn owl reproduction, in Ibis, 156, 433-441.
Amphibians in the diet of European barn owls
Roulin A., Dubey S. (2013), Amphibians in the diet of European barn owls, in Bird Study, 60, 264-269.
Barn owls do not interrupt their siblings
Dreiss A. N., Ruppli C. A., Oberli F., Antoniazza S., Henry I., Roulin A. (2013), Barn owls do not interrupt their siblings, in Animal Behaviour, 86, 119-126.
Big Brother is watching you: eavesdropping to resolve family conflicts
Dreiss A. N., Ruppli C. A., Faller C., Roulin A. (2013), Big Brother is watching you: eavesdropping to resolve family conflicts, in Behavioral Ecology , 24, 717-722.
Corticosterone shifts reproductive behaviour towards self-maintenance in the barn owl and is linked to melanin-based coloration in females
Almasi B., Roulin A., Jenni L. (2013), Corticosterone shifts reproductive behaviour towards self-maintenance in the barn owl and is linked to melanin-based coloration in females, in Hormones and Behavior, 64, 171-181.
Efficiency and significance of multiple vocal signals in sibling competition
Ruppli C., Dreiss A.N., Roulin A. (2013), Efficiency and significance of multiple vocal signals in sibling competition, in Evolutionary Biology , 40, 579-588.
Evaluation of two minimally invasive techniques for electroencephalogram recording in wild or free behaving animals
Scriba M., Harmening W. M., Mettke-Hofmann C., Vyssotski A. L., Roulin A., Wagner H., Rattenborg N. (2013), Evaluation of two minimally invasive techniques for electroencephalogram recording in wild or free behaving animals, in Journal of Comparative Physiology , 199, 183-189.
Genetics of coloration in birds
Roulin A., Ducrest A.-L. (2013), Genetics of coloration in birds, in Seminars in Cell and Developmental Biology , 24, 594-608.
Geographic and temporal variation in the consumption of bats by European barn owls
Roulin A., Christe C. (2013), Geographic and temporal variation in the consumption of bats by European barn owls, in Bird Study, 60, 561-569.
Immune and stress responses covary with melanin-based coloration in the barn swallow
Saino N., Romano M., Canova L., Costanzo A., Rubolini D., Roulin A., Moller A. P. (2013), Immune and stress responses covary with melanin-based coloration in the barn swallow, in Evolutionary Biology , 40, 521-531.
Melanin-based colour polymorphism signals agressive personality in nest and territory defence in the tawny owl (Strix aluco).
Da Silva A., van den Brink V., Emaresi G., Luzio E., Bize P., Dreiss A. N., Roulin A. (2013), Melanin-based colour polymorphism signals agressive personality in nest and territory defence in the tawny owl (Strix aluco)., in Behavioral Ecology and Sociobiology, 67, 1041-1052.
Multiple paternity in polyandrous barn owls (Tyto alba).
Henry I., Antoniazza S., Dubey S., Simon C., Waldvogel C., Burri R., Roulin A. (2013), Multiple paternity in polyandrous barn owls (Tyto alba)., in Plos One , 8, e80112.
Nestling barn owls assess short-term variation in the amount of vocally competing siblings
Ruppli C., Dreiss A.N., Roulin A. (2013), Nestling barn owls assess short-term variation in the amount of vocally competing siblings, in Animal Cognition , 16, 993-1000.
Pleiotropy in the melanocortin system: expression levels of this system are associated with melanogenesis and pigmentation in the tawny owl (Strix aluco)
Emaresi G., Ducrest A.-L., Bize P., Richter H., Simon C., Roulin A. (2013), Pleiotropy in the melanocortin system: expression levels of this system are associated with melanogenesis and pigmentation in the tawny owl (Strix aluco), in Molecular Ecology , 22, 4915-4930.
Reptiles produce pheomelanin: evidence in the Eastern Hermann’s tortoise (Eurotestudo boettgeri)
Roulin A., Mafli A., Wakamatsu K. (2013), Reptiles produce pheomelanin: evidence in the Eastern Hermann’s tortoise (Eurotestudo boettgeri), in Journal of Herpetology , 47, 258-261.
Reptiles produce pheomelanin: evidence in the Eastern Hermann’s tortoise (Eurotestudo boettgeri)
Roulin A., Mafli A., Wakamatsu K. (2013), Reptiles produce pheomelanin: evidence in the Eastern Hermann’s tortoise (Eurotestudo boettgeri), in Journal of Herpetology , 47, 258-261.
Ring recoveries of dead birds confirm that darker pheomelanic barn owls disperse longer distances
Roulin A. (2013), Ring recoveries of dead birds confirm that darker pheomelanic barn owls disperse longer distances, in Journal of Ornithology, 154, 871-874.
Sexually dimorphic melanin-based color polymorphism, Feather melanin content and wing feather structure in the barn owl (Tyto alba)
Roulin A., Mangel J., Wakamatsu K., Bachmann T. (2013), Sexually dimorphic melanin-based color polymorphism, Feather melanin content and wing feather structure in the barn owl (Tyto alba), in Biological Journal of the Linnean Society, 109, 562-573.
The impact of pre- and postnatal contexts on immunity, glucocorticoids and oxidative stress résistance in wild and domesticated grey partridges
Homberger B., Jenni-Eiermann S., Roulin A., Jenni L. (2013), The impact of pre- and postnatal contexts on immunity, glucocorticoids and oxidative stress résistance in wild and domesticated grey partridges, in Functional Ecology , 27, 1042-1054.
The vigilance components of begging and sibling competition
Dreiss A. N., Calcagno M., van den Brink V., Laurent A., Almasi B., Jenni L., Roulin A. (2013), The vigilance components of begging and sibling competition, in Journal of Avian Biology, 44, 359-368.
Coloration signals the ability to cope with elevated stress hormones: effects of corticosterone on growth of barn owls is associated with melanism
Almasi B., Roulin A., Korner-Nievergelt F., Jenni-Eiermann S., Jenni S. (2012), Coloration signals the ability to cope with elevated stress hormones: effects of corticosterone on growth of barn owls is associated with melanism, in Journal of Evolutionary Biology , 25, 1189-1199.
Condition-dependent expression of melanin-based colouration in the Eurasian kestrel
Piault R., van den Brink V., Roulin A. (2012), Condition-dependent expression of melanin-based colouration in the Eurasian kestrel, in Naturwissenschaften , 99, 391-396.
Diet and breeding success of long-eared owls in a semi-arid environment
Motti C., Izhaki I., Leshem Y., Roulin A. (2012), Diet and breeding success of long-eared owls in a semi-arid environment, in Journal of Arid Environments , 85, 142--144.
Docility covaries with melanin-based colouration in juvenile kestrels (Falco tinnunculus)
Van den Brink, V., Henry I., Roulin A. (2012), Docility covaries with melanin-based colouration in juvenile kestrels (Falco tinnunculus), in Ethology, 118, 673-682.
Dominant nestlings displaying female-like melanin coloration behave altruistically in the barn owl
Roulin A., Da Silva A., Ruppli C. A. (2012), Dominant nestlings displaying female-like melanin coloration behave altruistically in the barn owl, in Animal Behaviour, 84, 1229-1236.
Local adaptation and matching habitat choice in female barn owls with respect to melanic coloration
Dreiss A.N., Antoniazza S., Burri R., Fumagalli L., Sonnay C., Frey C., Goudet J., Roulin A. (2012), Local adaptation and matching habitat choice in female barn owls with respect to melanic coloration, in Journal of Evolutionary Biology , 25, 103-114.
Melanic color-dependent anti-predator behavior strategies in barn owl nestlings
Van den Brink V., Dolivo V., Falourd X., Dreiss A.N., Roulin A. (2012), Melanic color-dependent anti-predator behavior strategies in barn owl nestlings, in Behavioral Ecology , 23, 473-480.
Nest-box design for the study of diurnal raptors and owls is still an overlooked point in ecological, evolutionary and conservation studies: a review
Lambrechts M. M., Wiebe K. L., Sunde P., Solonen T., Sergio F., Roulin A., Møller A. P., Lopez B. C., Fargallo J. A., Exo K.-M., Dell’Omo G., Costantini D., Charter M., Butler M.W., Bortolotti G. R., Arlettaz R., Korpimäki E. (2012), Nest-box design for the study of diurnal raptors and owls is still an overlooked point in ecological, evolutionary and conservation studies: a review, in Journal of Ornithology , 153, 23-34.
Similar patterns of local barn owl adaptation in the Middle East and Europe with respect to melanic coloration
Charter M., Peleg O., Leshem Y., Roulin A. (2012), Similar patterns of local barn owl adaptation in the Middle East and Europe with respect to melanic coloration, in Biological Journal of the Linnean Society , 106, 447-454.
The occurrence of reptiles in barn owl diet in Europe
Roulin A., Dubey S. (2012), The occurrence of reptiles in barn owl diet in Europe, in Bird Study, 59, 504-508.
Zero inflated GLMM applied to barn owl data
Zuur A.F., Saveliev A. A., Ieno E. N., Roulin A. (2012), Zero inflated GLMM applied to barn owl data, in Ieno E. N., Zuur A. F., Saveliev A. A. (ed.), 1-10.
Association between melanism, physiology and behaviour: a role for the melanocortin system
Roulin A., Ducrest A.-L. (2011), Association between melanism, physiology and behaviour: a role for the melanocortin system, in European Journal of Pharmacology , 660, 226-233.
Eumelanin- and pheomelanin-based color advertises resistance to oxidative stress in opposite ways
Roulin A., Almasi B., Stier K., Jenni L. (2011), Eumelanin- and pheomelanin-based color advertises resistance to oxidative stress in opposite ways, in Journal of Evolutionary Biology , 24, 2241-2247.
Eumelanin-based coloration and fitness parameters in birds: a meta-analysis
Meunier J., Figueiredo Pinto S., Burri R., Roulin A. (2011), Eumelanin-based coloration and fitness parameters in birds: a meta-analysis, in Behavioral Ecology and Sociobiology , 65, 559-567.
Habitat, breeding performance, diet and individual age in Swiss barn owls (Tyto alba)
Frey C., Sonnay C., Dreiss A.N., Roulin A. (2011), Habitat, breeding performance, diet and individual age in Swiss barn owls (Tyto alba), in Journal of Ornithology, 152, 279-290.
Mc1R-dependent melanin-based colour polymorphism is associated with cell-mediated response in the Eleonora’s falcon
Gangoso L., Grande J.M., Ducrest A.-L., Figuerola J., Bortolotti G., Tella J.L., Roulin A. (2011), Mc1R-dependent melanin-based colour polymorphism is associated with cell-mediated response in the Eleonora’s falcon, in Journal of Evolutionary Biology , 24, 2055-2063.
Melanin-based colouration predicts aggressiveness and boldness in captive Eastern Hermann’s tortoises
Mafli A., Wakamatsu K., Roulin A. (2011), Melanin-based colouration predicts aggressiveness and boldness in captive Eastern Hermann’s tortoises, in Animal Behaviour , 81, 859-863.
Owl melanin-based plumage redness is more frequent near than away from the equator: implications on the effect of climate change on biodiversity
Roulin A., Burri R., Antoniazza S. (2011), Owl melanin-based plumage redness is more frequent near than away from the equator: implications on the effect of climate change on biodiversity, in Biological Journal of the Linnean Society , 102, 573-582.
Pale and dark reddish melanic tawny owls differentially regulate the level of blood circulating POMC prohormone in relation to environmental conditions
Roulin A., Emaresi G., Bize P., Gasparini J., Piault R., Ducrest A.-L. (2011), Pale and dark reddish melanic tawny owls differentially regulate the level of blood circulating POMC prohormone in relation to environmental conditions, in Oecologia , 166, 913-921.
Plumage polymorphism in melanin-based coloration: a case study in the tawny owl Strix aluco
Emaresi G., Bize P., Gasparini J., Piault P., Roulin A. (2011), Plumage polymorphism in melanin-based coloration: a case study in the tawny owl Strix aluco, in Zuberogoitia I., Martínez J.E. (ed.), Diputación Foral de Bizkaia, Bizkaia, 242-252.
Spatial variation in the temporal change of male and female melanic ornamentation in the barn owl
Roulin A., Antoniazza S., Burri R. (2011), Spatial variation in the temporal change of male and female melanic ornamentation in the barn owl, in Journal of Evolutionary Biology , 24, 1403-1409.
Corticosterone promotes scramble competition over sibling negotiation in barn owl nestlings (Tyto alba
Ruppli C.R., Almasi B., Dreiss A. N., Battesti M., Jenni L., Roulin A., Corticosterone promotes scramble competition over sibling negotiation in barn owl nestlings (Tyto alba, in Evolutionary Biology.
Linking melanism to brain development : Expression of a melanism-related gene in barn owl feather follicles predicts sleep ontogeny
Scriba M., Ducrest A. L., Henry I., Vyssotski A. L., Rattenborg N., Roulin A., Linking melanism to brain development : Expression of a melanism-related gene in barn owl feather follicles predicts sleep ontogeny, in Frontiers in Zoology.
Melanin-based colouration predicts natal dispersal in the barn owl Tyto alba
Van den Brink V., Dreiss A. N., Roulin A., Melanin-based colouration predicts natal dispersal in the barn owl Tyto alba, in Animal Behaviour.
Sibling competition and cooperation over parental care
Roulin A., Dreiss A.N., Sibling competition and cooperation over parental care, in Kölliker M., Royle N., Smiseth P. (ed.), Oxford University Press, Oxford.
The importance of micro-habitat in the breeding of barn owls Tyto alba
Charter M., Leshem Y., Meyrom K., Peleg O., Roulin A., The importance of micro-habitat in the breeding of barn owls Tyto alba, in Bird Study.

Zusammenarbeit

Gruppe / Person Land
Formen der Zusammenarbeit
Animal Demography Unit, Departmentof Zoology, University of Cape Town, Rondebosch 7701, South Afric Südafrika (Republik) (Afrika)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Laboratory of Electromagnetics and Acoustics, EPFL Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Max Planck Institute for Ornithology, Sleep & Flight Group, Eberhard-Gwinner-str.11, 82319 Seewiese Deutschland (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Highland Statistics Deutschland (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Animal Ecology Group, Centre for Ecological and Evolutionary Studies (CEES), University of Groningen Niederlande (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Audiovisual Communications Laboratory, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausann Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Department of Mathematical Sciences, NTNU, 7491 Trondheim, Norway Norwegen (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Department of Zoology, Tel-Aviv University, Ramat-Aviv, 69978 Israel (Asien)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Center for Conservation Biology, Department of Biology, NTNU, 7491 Trondheim Norwegen (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Swiss Ornithological Institute, 6204 Sempach Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Department of Chemistry, Fujita Health University School of Health Sciences, Toyoake Aichi 470-1192 Japan (Asien)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation

Wissenschaftliche Veranstaltungen

Aktiver Beitrag

Titel Art des Beitrags Titel des Artikels oder Beitrages Datum Ort Beteiligte Personen
From the wild to the lab Vortrag im Rahmen einer Tagung Dark and pale melanic colorations signal different qualities: the importance of the melanocortin system 23.05.2014 Lausanne, Schweiz Roulin Alexandre;
Université Paris 6 Einzelvortrag Negotiation for resources in sibling barn owls: a model of dynamics of animal communication 15.04.2014 Paris, Frankreich Dreiss Amélie;
Université Claude Bernard Lyon Einzelvortrag Negotiation for resources in sibling barn owls: a model of dynamics of animal communication 08.04.2014 Lyon, Frankreich Dreiss Amélie;
Université de Montpellier Einzelvortrag Negotiation for resources in sibling barn owls: a model of dynamics of animal communication 02.02.2014 Montpellier, Frankreich Dreiss Amélie;
Université de Bourgogne Einzelvortrag Negotiation for resources in sibling barn owls: a model of dynamics of animal communication 12.11.2013 Dijon, Frankreich Dreiss Amélie;
International seminar on environmental friendly agriculture pest management Vortrag im Rahmen einer Tagung Barn owl as biological pest control 09.11.2013 Tapei, Taiwan Roulin Alexandre;
Environmental Education Vortrag im Rahmen einer Tagung Barn owl as biological control 05.11.2013 Amman, Jordanien Roulin Alexandre;
University of Bern Einzelvortrag Negotiation for resources in sibling barn owls: a model of dynamics of animal communication 15.10.2013 Berne, Schweiz Dreiss Amélie;
Adapting to Global change in the Mediterranean Hotspot Vortrag im Rahmen einer Tagung The importance of polymorphism in the face of global change 18.09.2013 Seville, Spanien Roulin Alexandre;
Université Paul Sabatier, Toulouse Einzelvortrag Negotiation for resources in sibling barn owls: a model of dynamics of animal communication 15.09.2013 Toulouse, Frankreich Dreiss Amélie;
Congress of the European Society for Evolutionary Biology Poster Pleiotropy in the melanocortin system: expression levels of this system are associated with melanogenesis and pigmentation in the barn owl 19.08.2013 Lisbonne, Portugal Roulin Alexandre;
International Ethological Conference Vortrag im Rahmen einer Tagung Memory of social interactions in sibling competition 12.08.2013 Newcastle, Grossbritannien und Nordirland Dreiss Amélie;
Invitation dans une université pour un séminaire Einzelvortrag Dark and pale melanic colorations signal different qualities: the importance of genetic mechanisms 05.06.2013 Tempe, Arizona, USA, Vereinigte Staaten von Amerika Roulin Alexandre;
Invitation dans une université pour un séminaire Einzelvortrag Dark and pale melanic colorations signal different qualities: the importance of genetic mechanisms 10.04.2013 University of Milano, Italy, Italien Roulin Alexandre;
14th International Behavioral Ecolgoy Conference in Lund, Sweden Vortrag im Rahmen einer Tagung The genetics of melanin-based coloration: a role for the melanocortin system 10.08.2012 Lund, Sweden, Schweden Roulin Alexandre;
Invitation dans une université pour un séminaire Einzelvortrag Le stress: un agent sélectif chez la chouette effraie 26.04.2012 La Tour du Valat Camargue , Frankreich Roulin Alexandre;
Invitation dans une université pour un séminaire Einzelvortrag The study of non-model organisms: the evolution of the melanocortin system in the barn owl 16.03.2012 Seewiesen Germany , Deutschland Roulin Alexandre;
Formation avancée pour l’expérimentation sur des espèces animales sauvages Vortrag im Rahmen einer Tagung The study of non-model organisms: the evolution of the melanocortin system in the barn owl 01.12.2011 Genève, Schweiz Roulin Alexandre;
Conference on raptor pest control Vortrag im Rahmen einer Tagung Barn owls as biological pest control: The ecology of population dynamics 25.10.2011 Jordan Dead Sea , Jordanien Roulin Alexandre;
Journée Bioacoustique Vortrag im Rahmen einer Tagung Localisation de sources, extraction et caracterisation de signaux acoustiques: application aux cris de chouettes effraies en milieu confiné 12.10.2011 Paris, Frankreich Dreiss Amélie;
8th European Ornithologist’s Union Conference Vortrag im Rahmen einer Tagung Sexual selection to signal resistance to parasites or to the full range of stressful factors 27.08.2011 Riga, Lettonie, Litauen Roulin Alexandre;


Verbundene Projekte

Nummer Titel Start Förderungsinstrument
153467 Sexually antagonistic selection: a role for the melanocortin system 01.07.2014 Projektförderung (Abt. I-III)
120517 Sexually antagonistic selection: evidence and proximate mechanisms 01.07.2008 Projektförderung (Abt. I-III)
127057 Interactions of genetic, maternal and early developmental effects on stress sensitivity, personality and suvival of offspring 01.04.2010 Projektförderung (Abt. I-III)
150434 The evolution of melanin-based colour polymorphism in the Southern Hemisphere 01.06.2014 Internationale Kurzaufenthalte
153467 Sexually antagonistic selection: a role for the melanocortin system 01.07.2014 Projektförderung (Abt. I-III)

Abstract

The evolutionary stability of sexual dimorphism is a central issue of sexual selection theory. The usual situation is when males are sexually selected to be larger or more conspicuous, while females are naturally selected to be cryptic during the reproductive period. Sexual dimorphism can also be maintained if the underlying genes have positive effects in one sex but negative effects in the other sex. These genes are often located on sex chromosomes because sexually antagonistic selection favours sex-specific gene expression with this gene tending to be less expressed in the sex in which gene products have negative effects. In the prolongation of my SNF-grant I intend to continue to investigate the causes and consequences of sexually antagonistic selection in the barn owl, a species displaying a melanin-based colour trait to a larger extent in females than in males, and blacker females are of higher quality. This project is divided in five complementary subprojects, with two of them being new. (i) Phenotypic causes and consequence of sexually antagonistic selection: We will continue to analyse and publish data collected for the last 16 years in Switzerland and data from museum collections which offer the possibility to have phenotypic data of owls collected worldwide. (ii) Genetics of sexually antagonistic selection: We will end up the project on the genetics of melanin-based traits and their associated phenotypic attributes. (iii) Gene expression: The methods to measure the expression of genes involved in melanogenesis are ready to complete this project. (iv) Circadian rhythm: We found exciting results of a link between circadian rhythm and melanin-based coloration. We will thus investigate this aspect to understand the causes and consequences of circadian rhythm in the maintenance of variation in melanin-based coloration. (v) Methylation: Association between melanin-based coloration and other phenotypic attributes are mainly between mother coloration and offspring phenotype. This suggests genomic imprinting, a hypothesis that we will start to tackle. These aspects will allow us to better understand the evolutionary consequences of sexually antagonistic selection, a timely topic.
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