Birds use eggshell UV reflectance when recognizing non-mimetic parasitic eggs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F16%3A00453785" target="_blank" >RIV/68081766:_____/16:00453785 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/16:10333026

Výsledek na webu

<a href="http://dx.doi.org/10.1093/beheco/arv206" target="_blank" >http://dx.doi.org/10.1093/beheco/arv206</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/beheco/arv206" target="_blank" >10.1093/beheco/arv206</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Birds use eggshell UV reflectance when recognizing non-mimetic parasitic eggs

Popis výsledku v původním jazyce

Brood parasitism generally has detrimental effect on host fitness. To avoid the negative consequences of brood parasitism, hosts have often evolved an effective counter-adaptation—recognition and rejection of parasitic eggs. Because eggshells of the Eurasian reed warbler (Acrocephalus scirpaceus) and its brood parasite, the common cuckoo (Cuculus canorus), differ significantly in their ultraviolet (UV) reflectance, one would expect that the ability of the hosts to see UV light will play an important role in recognition and rejection of parasitic eggs. To test this assumption, we performed 3 sets of experiments differing in the level of mimicry of the parasitic egg. In the first 2 experiments, we parasitized host nests by conspecific eggs (either own or from other females with perfect and good mimicry, respectively) coated either with a UV blocker (completely reducing UV reflectance of the eggshell) or with Vaseline as a control treatment. Although the UV blocker significantly decreased eggshell UV reflectance, hosts accepted most of these conspecific eggs and the type of coating did not significantly affect the probability of rejection. In the third experiment, we parasitized clutches with 2 types of non-mimetic eggs differing only in UV reflectance (UV and UV+). We found that hosts rejected UV+ eggs at a significantly higher rate than UV eggs, probably due to their lower mimicry in the UV spectrum. Here, we demonstrated that hosts use UV signals during egg recognition. Moreover, we suggest that such signals may play a more important role when the parasitic egg is non-mimetic rather than mimetic, when hosts can use additional cues, such as spotting pattern.

Název v anglickém jazyce

Birds use eggshell UV reflectance when recognizing non-mimetic parasitic eggs

Popis výsledku anglicky

Brood parasitism generally has detrimental effect on host fitness. To avoid the negative consequences of brood parasitism, hosts have often evolved an effective counter-adaptation—recognition and rejection of parasitic eggs. Because eggshells of the Eurasian reed warbler (Acrocephalus scirpaceus) and its brood parasite, the common cuckoo (Cuculus canorus), differ significantly in their ultraviolet (UV) reflectance, one would expect that the ability of the hosts to see UV light will play an important role in recognition and rejection of parasitic eggs. To test this assumption, we performed 3 sets of experiments differing in the level of mimicry of the parasitic egg. In the first 2 experiments, we parasitized host nests by conspecific eggs (either own or from other females with perfect and good mimicry, respectively) coated either with a UV blocker (completely reducing UV reflectance of the eggshell) or with Vaseline as a control treatment. Although the UV blocker significantly decreased eggshell UV reflectance, hosts accepted most of these conspecific eggs and the type of coating did not significantly affect the probability of rejection. In the third experiment, we parasitized clutches with 2 types of non-mimetic eggs differing only in UV reflectance (UV and UV+). We found that hosts rejected UV+ eggs at a significantly higher rate than UV eggs, probably due to their lower mimicry in the UV spectrum. Here, we demonstrated that hosts use UV signals during egg recognition. Moreover, we suggest that such signals may play a more important role when the parasitic egg is non-mimetic rather than mimetic, when hosts can use additional cues, such as spotting pattern.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EG - Zoologie

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Behavioral Ecology

ISSN

1045-2249

e-ISSN

—

Svazek periodika

27

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

677-684

Kód UT WoS článku

000375398800043

EID výsledku v databázi Scopus

2-s2.0-84964691909