Search results for "conspicuousness"

showing 3 items of 3 documents

Predator mimicry, not conspicuousness, explains the efficacy of butterfly eyespots

2015

Large conspicuous eyespots on butterfly wings have been shown to deter predators. This has been traditionally explained by mimicry of vertebrate eyes, but recently the classic eye-mimicry hypothesis has been challenged. It is proposed that the conspicuousness of the eyespot, not mimicry, is what causes aversion due to sensory biases, neophobia or sensory overloads. We conducted an experiment to directly test whether the eye-mimicry or the conspicuousness hypothesis better explain eyespot efficacy. We used great tits ( Parus major ) as model predator, and tested their reaction towards animated images on a computer display. Birds were tested against images of butterflies without eyespots, wi…

conspicuousness hypothesispredator mimicryBiologyEyeGeneral Biochemistry Genetics and Molecular BiologyPredationbutterfly eyespotsSongbirdsmedicineAnimalsWings AnimalResearch ArticlesBiological MimicryGeneral Environmental ScienceParusCommunicationGeneral Immunology and MicrobiologyPigmentationbusiness.industryBiological MimicryNeophobiaAnimal colorationGeneral Medicinebiology.organism_classificationmedicine.diseasegreat titsEvolutionary biologyButterflyVisual PerceptionMimicryta1181EyespotGeneral Agricultural and Biological SciencesbusinessButterfliesProceedings of the Royal Society B: Biological Sciences
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Protective coloration of European vipers throughout the predation sequence

2020

Antipredator adaptations in the form of animal coloration are common and often multifunctional. European vipers (genus Vipera) have a characteristic dorsal zigzag pattern, which has been shown to serve as a warning signal to potential predators. At the same time, it has been suggested to decrease detection risk, and to cause a motion dazzle or flicker-fusion effect during movement. We tested these hypotheses by asking whether (1) the zigzag pattern decreases detection risk and (2) the detection is dependent on the base coloration (grey or brown) or the snake's posture (coiled, basking form or S-shaped, active form). Additionally, (3) we measured the fleeing speed of adders, Vipera berus, an…

conspicuousness0106 biological sciencesvisiongenetic structuresVipera berusAPOSEMATISMdetectionAVOIDANCEZoologyAposematismFlicker fusion threshold010603 evolutionary biology01 natural sciencesPredationzigzag pattern0501 psychology and cognitive sciencesSTRATEGY050102 behavioral science & comparative psychologyGenus ViperaSEXUAL DICHROMATISMDISTASTEFUL PREYEcology Evolution Behavior and SystematicsSNAKESanimal colorationbiology05 social sciencesflicker-fusionAnimal colorationbiology.organism_classificationcrypsisdazzle colorationZigzagDISTANCE1181 Ecology evolutionary biologyCrypsiswarning signalAnimal Science and ZoologypredationAnimal Behaviour
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Maineen ja tunnettuuden merkitys yhteishyvään pyrkivän organisaation legitimiteetin muodostumisessa

2010

Kolmannen sektorin merkitys yhteiskunnassa on vahvistunut. Yhteishyvään pyrkivien kolmannen sektorin organisaatioiden voi kuitenkin olla vaikeaa saavuttaa legitiimi asema, jossa niiden toimintaa pidetään riittävän tarpeellisena. Imagoilla, maineella ja tunnettuudella voidaan nähdä olevan suuri vaikutus legitimiteetin muodostumiseen ja säilyttämiseen toimintakentällä. Yhteishyvään pyrkivien organisaatioiden aineettomien ominaisuuksien merkitystä legitimiteetille ei kuitenkaan ole tutkittu paljon. Tutkimuksen tavoitteena oli selvittää, miten yhteishyvään pyrkivän organisaation tunnettuus, mielikuvat ja maine tärkeiden sidosryhmien keskuudessa vaikuttavat legitimiteetin muodostumiseen, ja mite…

conspicuousnessyleishyödylliset yhteisöttunnettuusthird sectorimagokolmas sektoriviestintästrategiatmainelegitimiteettiidentiteettiimagesidosryhmätPerhehoitoliitto ry
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