About: Ultraviolet and green parts of the colour spectrum affect egg rejection in the song thrush (Turdus philomelos)     Goto   Sponge   NotDistinct   Permalink

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Description
  • Studovali jsme efekt různých barev měřených spektrofotometricky (UV–viditelná část spektra) na odmítání cizích vajec drozdy zpěvnými. Provedli jsme sérii experimentů s modrými modely, reprezentujícími mimetická vejce, a modely nabarvenými šesti jinými barvami, reprezentujícími nemimetická vejce. Naše výsledky ukázaly, že dvě z modrých barev, původně označených jako mimetické, byly odmítány s vysokou frekvencí, zatímco jeden z nemimetických modelů byl akceptován. Mnohonásobná regrese absolutních rozdílů ve zbarvení mezi hostitelskými a vloženými vejci na frekvenci odmítání ukázala, že úroveň mimikry v UV a zelené části spektra významně ovlivňovala odmítání vajec. Podle našich znalostí je toto první detailní studie, která prokázala, že odlišné vnímání barev ptáky může ovlivňovat jejich reakce na cizí vejce. Naše výsledky naznačují, že kombinace UV a viditelné části spektra hraje hlavní roli v evoluci diskriminačních procesů u ptáků. (cs)
  • We investigated effect of different colors of the experimental eggs measured by UV–visible reflectance spectrophotometry on rejection behavior in the song thrush. We carried out a set of experiments with four blue model eggs representing mimetic eggs, whereas six other colours represented nonmimetic eggs. Our results revealed that two colors originally designed as a mimetic were rejected at a high rate, whereas one group of the nonmimetic was accepted. A multiple regression model of absolute differences between song thrush and experimental eggs on rejection rate showed that the level of mimicry in the UV and green parts of the color spectrum significantly influenced egg rejection. To our knowledge, this is the first detailed study showing that different color perception by the birds can affect their responses towards the parasitic egg. These findings suggest that the combination of UV and visible ranges of the spectra plays a major role in the evolution of discrimination processes.
  • We investigated effect of different colors of the experimental eggs measured by UV–visible reflectance spectrophotometry on rejection behavior in the song thrush. We carried out a set of experiments with four blue model eggs representing mimetic eggs, whereas six other colours represented nonmimetic eggs. Our results revealed that two colors originally designed as a mimetic were rejected at a high rate, whereas one group of the nonmimetic was accepted. A multiple regression model of absolute differences between song thrush and experimental eggs on rejection rate showed that the level of mimicry in the UV and green parts of the color spectrum significantly influenced egg rejection. To our knowledge, this is the first detailed study showing that different color perception by the birds can affect their responses towards the parasitic egg. These findings suggest that the combination of UV and visible ranges of the spectra plays a major role in the evolution of discrimination processes. (en)
Title
  • Ultraviolet and green parts of the colour spectrum affect egg rejection in the song thrush (Turdus philomelos)
  • UV a zelené části spektra ovlivňují rozpoznávání vajec u drozda zpěvného (Turdus philomelos) (cs)
  • Ultraviolet and green parts of the colour spectrum affect egg rejection in the song thrush (Turdus philomelos) (en)
skos:prefLabel
  • Ultraviolet and green parts of the colour spectrum affect egg rejection in the song thrush (Turdus philomelos)
  • UV a zelené části spektra ovlivňují rozpoznávání vajec u drozda zpěvného (Turdus philomelos) (cs)
  • Ultraviolet and green parts of the colour spectrum affect egg rejection in the song thrush (Turdus philomelos) (en)
skos:notation
  • RIV/68081766:_____/07:00085793!RIV08-AV0-68081766
http://linked.open.../vavai/riv/strany
  • 269;276
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(IAA600930605), P(LC06073), Z(AV0Z60930519)
http://linked.open...iv/cisloPeriodika
  • 2
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 456500
http://linked.open...ai/riv/idVysledku
  • RIV/68081766:_____/07:00085793
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • brood parasitism; cuckoo; egg appearance; evolution of mimicry; reflectance (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [3191CED539E8]
http://linked.open...i/riv/nazevZdroje
  • Biological Journal of the Linnean Society
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 92
http://linked.open...iv/tvurceVysledku
  • Honza, Marcel
  • Polačiková, Lenka
  • Procházka, Petr
http://linked.open...n/vavai/riv/zamer
issn
  • 0024-4066
number of pages
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