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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F14%3A10282414%21RIV15-MSM-11310___
rdf:type
skos:Concept n9:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1016/j.anbehav.2014.01.021
dcterms:description
Studies on aposematism have generally focused on the benefits of red or yellow coloration, occasionally in contrast with green or brown, but rarely blue or orange. Furthermore, almost no studies have explicitly studied the utility of iridescent coloration in aposematism. To evaluate the survival benefit of iridescent coloration, we tested the ability of the natural colour extremes of Tectocoris diophthalmus jewelbugs to induce initial avoidance, learned avoidance, discrimination from palatable alternatives and broad generalization against avian predators: naive hand-reared and experienced wild-caught great tits, Parus major. Artificial baits were created by hollowing out bugs and inserting pieces of mealworm. Preference tests presented iridescent and orange baits simultaneously, then birds were divided into training groups and sequentially exposed to palatable black baits alternated with iridescent or orange baits made unpalatable by soaking mealworms in quinine solution. This was followed by simultaneous black/coloured discrimination tests, then a generalization test with both previously experienced and novel baits (all palatable). All groups showed a preference for orange baits over ones with iridescent patches. For wild-caught birds, attack latencies of iridescent and orange training groups were statistically indistinguishable, although only orange caused increased attack latency over the sequence. Hand-reared birds showed no change in attack rate/latency towards iridescent bugs over the sequence. In postlearning discrimination tests, all groups showed equally strong preference for palatable black baits and their unpalatable training baits. In generalization tests, hand-reared birds were most averse towards trained baits, but increased avoidance of iridescent-and-black baits suggests iridescence alone can contribute to aposematism. Studies on aposematism have generally focused on the benefits of red or yellow coloration, occasionally in contrast with green or brown, but rarely blue or orange. Furthermore, almost no studies have explicitly studied the utility of iridescent coloration in aposematism. To evaluate the survival benefit of iridescent coloration, we tested the ability of the natural colour extremes of Tectocoris diophthalmus jewelbugs to induce initial avoidance, learned avoidance, discrimination from palatable alternatives and broad generalization against avian predators: naive hand-reared and experienced wild-caught great tits, Parus major. Artificial baits were created by hollowing out bugs and inserting pieces of mealworm. Preference tests presented iridescent and orange baits simultaneously, then birds were divided into training groups and sequentially exposed to palatable black baits alternated with iridescent or orange baits made unpalatable by soaking mealworms in quinine solution. This was followed by simultaneous black/coloured discrimination tests, then a generalization test with both previously experienced and novel baits (all palatable). All groups showed a preference for orange baits over ones with iridescent patches. For wild-caught birds, attack latencies of iridescent and orange training groups were statistically indistinguishable, although only orange caused increased attack latency over the sequence. Hand-reared birds showed no change in attack rate/latency towards iridescent bugs over the sequence. In postlearning discrimination tests, all groups showed equally strong preference for palatable black baits and their unpalatable training baits. In generalization tests, hand-reared birds were most averse towards trained baits, but increased avoidance of iridescent-and-black baits suggests iridescence alone can contribute to aposematism.
dcterms:title
Scared by shiny? The value of iridescence in aposematic signalling of the hibiscus harlequin bug Scared by shiny? The value of iridescence in aposematic signalling of the hibiscus harlequin bug
skos:prefLabel
Scared by shiny? The value of iridescence in aposematic signalling of the hibiscus harlequin bug Scared by shiny? The value of iridescence in aposematic signalling of the hibiscus harlequin bug
skos:notation
RIV/00216208:11310/14:10282414!RIV15-MSM-11310___
n3:aktivita
n10:P n10:I
n3:aktivity
I, P(GAP505/11/1459)
n3:cisloPeriodika
duben
n3:dodaniDat
n16:2015
n3:domaciTvurceVysledku
n4:7620411 n4:5648734 n4:6825923
n3:druhVysledku
n5:J
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
43864
n3:idVysledku
RIV/00216208:11310/14:10282414
n3:jazykVysledku
n20:eng
n3:klicovaSlova
Scutelleridae; Parus major; iridescence; innate wariness; Heteroptera; generalization; colour variation; avoidance learning; aposematism
n3:klicoveSlovo
n6:Scutelleridae n6:Parus%20major n6:avoidance%20learning n6:Heteroptera n6:generalization n6:iridescence n6:aposematism n6:colour%20variation n6:innate%20wariness
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[3F9CFA1F11A2]
n3:nazevZdroje
Animal Behaviour
n3:obor
n7:EG
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
4
n3:projekt
n13:GAP505%2F11%2F1459
n3:rokUplatneniVysledku
n16:2014
n3:svazekPeriodika
90
n3:tvurceVysledku
Ježová, Dana Exnerová, Alice Fabricant, Scott A. Štys, Pavel
n3:wos
000333761400039
s:issn
0003-3472
s:numberOfPages
11
n17:doi
10.1016/j.anbehav.2014.01.021
n15:organizacniJednotka
11310