Search results for "aposematism"

showing 4 items of 124 documents

The impact of life stage and pigment source on the evolution of novel warning signal traits

2021

Our understanding of how novel warning color traits evolve in natural populations is largely based on studies of reproductive stages and organisms with endogenously produced pigmentation. In these systems, genetic drift is often required for novel alleles to overcome strong purifying selection stemming from frequency-dependent predation and positive assortative mating. Here, we integrate data from field surveys, predation experiments, population genomics, and phenotypic correlations to explain the origin and maintenance of geographic variation in a diet-based larval pigmentation trait in the redheaded pine sawfly (Neodiprion lecontei), a pine-feeding hymenopteran. Although our experiments c…

varoitusvärimäntypistiäisetecological geneticsPopulationFREQUENCY-DEPENDENT SELECTIONevoluutioAposematismPredationravintoNegative selectionchemical defenseGenetic driftAposematismpolytypic colorationGeneticsAnimalsaposematismCOLORPOPULATION-GENETICSmuuntelu (biologia)educationEcology Evolution Behavior and Systematicseducation.field_of_studybiologyPigmentationfungiAssortative matingcarotenoidsfood and beverageshost adaptationbiology.organism_classificationBiological EvolutionHymenopterakarotenoiditREAD ALIGNMENTNeodiprion leconteiSawflyCHEMICAL DEFENSEPhenotypeEvolutionary biologyTRADE-OFFLarvaPredatory Behavior1181 Ecology evolutionary biologySHIFTING BALANCEWOOD TIGER MOTHGeneral Agricultural and Biological SciencesGENETIC CORRELATIONSMULLERIAN MIMICRYEvolution
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Diversity in warning coloration: selective paradox or the norm?

2019

Aposematic theory has historically predicted that predators should select for warning signals to converge on a single form, as a result of frequency-dependent learning. However, widespread variation in warning signals is observed across closely related species, populations and, most problematically for evolutionary biologists, among individuals in the same population. Recent research has yielded an increased awareness of this diversity, challenging the paradigm of signal monomorphy in aposematic animals. Here we provide a comprehensive synthesis of these disparate lines of investigation, identifying within them three broad classes of explanation for variation in aposematic warning signals: …

varoitusväripolytypismFREQUENCY-DEPENDENT SELECTIONModels BiologicalSEXUAL SELECTIONpolymorphismPOLYMORPHIC MULLERIAN MIMICRYSex FactorsmonimuotoisuusAnimalsaposematismEcosystemGRAPHOSOMA-LINEATUM HETEROPTERAPolymorphism GeneticINDO-WEST PACIFICEVOLUTIONARY SIGNIFICANCEBiological MimicryAge FactorsTemperaturePOISON FROGSOriginal ArticlesBiodiversityPigments BiologicalBiological EvolutionCORAL-SNAKE PATTERNcontinuous variationmuunteluBiological Variation PopulationPredatory Behavior1181 Ecology evolutionary biologyHISTORY TRADE-OFFSOriginal ArticleHELICONIUS BUTTERFLIES
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Influence of colour, smell and taste on the survival of the wood tiger moth (Arctia plantaginis) adults during predation event

2021

Saalistajien torjumiseksi saalis voi käyttää erilaisia puolustusmekanismeja, jotka stimuloivat useita eri aisteja (ts. multimodaalista signalointia). Esimerkiksi aposemaattiset eliöt puolustautuvat varoitussignaalin lisäksi sekundaarisella puolustuksella. Tässä tutkimuksessa keskityttiin siihen, kuinka täpläsiilikkään (Arctia plantaginis) väritys (genotyypit WW, Wy ovat valkoisia ja yy keltaisia), haju (metoksipyratsiinista) ja maku (pyrrolitsidiinialkaloidista) toimivat puolustuksena lintusaalistajien hyökkäyksiä vastaan. Linnuille tarjottiin kummankin värisiä eläviä siilikkäitä, joita oli manipuloitu niin, että niillä oli joko hajua, makua tai molempia näistä. Näin pystyttiin tutkimaan ku…

varoitusväripredator-prey interactionschemical defencedefence mechanismsyöperhosetwarning colorationalkaloidssaalistusCyanistes caeruleusalkaloiditAposematismmultimodal signallingbirdswarning signalsmothslinnutpredation
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Relative importance of different coloration, smell and shape in the predation of wasps : field experiments on hunting dragonflies (Odonata: Aeshna gr…

2002

väritampiainensudenkorennotwarning coloursdragonflyaposematismwaspukonkorennotruskoukonkorentohawkersaalistusbrown hawker
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