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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F13%3A10144021%21RIV14-GA0-11310___
rdf:type
n12:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1371/journal.pone.0064082
dcterms:description
Theory suggests that aposematism, specifically the learned avoidance of unprofitable prey via memorable color patterns, should result in selection for pattern uniformity. However, many examples to the contrary are seen in nature. Conversely, honest sexual signals are likely to exhibit greater variation because they reflect underlying variation in mate quality. Here we aim to characterize and quantify the mechanistic causes of color in Tectocoris diopthalmus to shed light on the costs of color production, and thus the potential information content of its color signals. We use Tectocoris diopthalmus because it is a weakly-defended stinkbug, and presents elements that have classically been studied in the context of aposematism (red coloring), and sexual selection (sexual dichromatism and iridescent coloring). Pigment analysis reveals that variation in orange coloration is due to the amount of erythropterin pigment, stored in intracellular granules. This pigment is common in Heteroptera, and as an endogenously produced excretory byproduct is unlikely to reflect mate quality or variation in unprofitability of the bug. Electron microscopy reveals the iridescent patches are caused by an epicuticular multilayer reflector, and the hue and patch size are directly related to the layer widths and extent of coverage of this layering. Furthermore, we identified melanin as an essential component of the multilayer reflector system; therefore, the quality of the iridescent patches may be affected by aspects of rearing environment and immunocompetence. We posit that T. diopthalmus has co-opted the melanic patches of a 'typical' red and black aposematic signal, transforming it into a complex and variable iridescent signal that may enhance its capacity to display individual quality. Theory suggests that aposematism, specifically the learned avoidance of unprofitable prey via memorable color patterns, should result in selection for pattern uniformity. However, many examples to the contrary are seen in nature. Conversely, honest sexual signals are likely to exhibit greater variation because they reflect underlying variation in mate quality. Here we aim to characterize and quantify the mechanistic causes of color in Tectocoris diopthalmus to shed light on the costs of color production, and thus the potential information content of its color signals. We use Tectocoris diopthalmus because it is a weakly-defended stinkbug, and presents elements that have classically been studied in the context of aposematism (red coloring), and sexual selection (sexual dichromatism and iridescent coloring). Pigment analysis reveals that variation in orange coloration is due to the amount of erythropterin pigment, stored in intracellular granules. This pigment is common in Heteroptera, and as an endogenously produced excretory byproduct is unlikely to reflect mate quality or variation in unprofitability of the bug. Electron microscopy reveals the iridescent patches are caused by an epicuticular multilayer reflector, and the hue and patch size are directly related to the layer widths and extent of coverage of this layering. Furthermore, we identified melanin as an essential component of the multilayer reflector system; therefore, the quality of the iridescent patches may be affected by aspects of rearing environment and immunocompetence. We posit that T. diopthalmus has co-opted the melanic patches of a 'typical' red and black aposematic signal, transforming it into a complex and variable iridescent signal that may enhance its capacity to display individual quality.
dcterms:title
Mechanisms of Color Production in a Highly Variable Shield-Back Stinkbug, Tectocoris diopthalmus (Heteroptera: Scutelleridae), and Why It Matters Mechanisms of Color Production in a Highly Variable Shield-Back Stinkbug, Tectocoris diopthalmus (Heteroptera: Scutelleridae), and Why It Matters
skos:prefLabel
Mechanisms of Color Production in a Highly Variable Shield-Back Stinkbug, Tectocoris diopthalmus (Heteroptera: Scutelleridae), and Why It Matters Mechanisms of Color Production in a Highly Variable Shield-Back Stinkbug, Tectocoris diopthalmus (Heteroptera: Scutelleridae), and Why It Matters
skos:notation
RIV/00216208:11310/13:10144021!RIV14-GA0-11310___
n12:predkladatel
n14:orjk%3A11310
n4:aktivita
n8:Z n8:S n8:P n8:I
n4:aktivity
I, P(GAP505/11/1459), S, Z(MSM0021620857)
n4:cisloPeriodika
5
n4:dodaniDat
n6:2014
n4:domaciTvurceVysledku
n16:4722744 n16:8275718
n4:druhVysledku
n19:J
n4:duvernostUdaju
n22:S
n4:entitaPredkladatele
n10:predkladatel
n4:idSjednocenehoVysledku
87030
n4:idVysledku
RIV/00216208:11310/13:10144021
n4:jazykVysledku
n13:eng
n4:klicovaSlova
conspicuousness; evolution; pteridines; pigments; selection; interference reflectors; warning signal; aposematic prey; sexually selected trait; tiger beetles cicindela
n4:klicoveSlovo
n7:interference%20reflectors n7:evolution n7:warning%20signal n7:pigments n7:sexually%20selected%20trait n7:conspicuousness n7:aposematic%20prey n7:selection n7:tiger%20beetles%20cicindela n7:pteridines
n4:kodStatuVydavatele
ES - Španělské království
n4:kontrolniKodProRIV
[F218801F5088]
n4:nazevZdroje
PLoS ONE
n4:obor
n17:CB
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
5
n4:projekt
n21:GAP505%2F11%2F1459
n4:rokUplatneniVysledku
n6:2013
n4:svazekPeriodika
8
n4:tvurceVysledku
Bosáková, Zuzana Kemp, Darrell J. Fabricant, Scott A. Herberstein, Marie E. Krajíček, Jan
n4:wos
000319654700203
n4:zamer
n18:MSM0021620857
s:issn
1932-6203
s:numberOfPages
9
n11:doi
10.1371/journal.pone.0064082
n20:organizacniJednotka
11310