Signal traits and oxidative stress: a comparative study across populations with divergent signals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F16%3A00459714" target="_blank" >RIV/68081766:_____/16:00459714 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.frontiersin.org/articles/10.3389/fevo.2016.00056/full" target="_blank" >https://www.frontiersin.org/articles/10.3389/fevo.2016.00056/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fevo.2016.00056" target="_blank" >10.3389/fevo.2016.00056</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Signal traits and oxidative stress: a comparative study across populations with divergent signals

Popis výsledku v původním jazyce

Diverging populations often shift patterns of signal use – a process that can contribute to reproductive isolation and speciation. Yet it is not clear why most traits gain or lose signal value during divergence. One reason this could occur is because changes in the relationship between signals and relevant physiological parameters degrade the reliability of a signal, or even change its underlying information content. Here we test whether signal trait elaboration is differently related to a central component of organismal health – oxidative stress – across populations that differ in signal use and preferences. In the recently diverged barn swallow subspecies complex (Hirundo rustica), different populations use different traits as sexual signals. Two of these traits, ventral breast plumage color and tail streamer length, differ markedly between North American H. r. erythrogaster and European H. r. rustica. Despite this divergence, variation in ventral plumage color was similarly associated with measures of oxidative damage across both populations. However, the directionality of these relationships differed between the sexes: darker male barn swallows had higher levels of plasma oxidative damage than their lighter counterparts, while the opposite relationship was seen in females. In contrast, relationships between tail streamer length and measures of oxidative stress were not consistent across populations. In European H. r. rustica, where males bearing elongated streamers are preferred as mates, longer-streamered males appeared to be more oxidatively stressed, whereas the opposite pattern was suggested in North American H. r. erythrogaster. Overall, our results suggest that while some phenotypic traits appear to be capable of conveying similar physiological information regardless of their use as signals, divergence in other phenotypic traits may be associated with shifts in their information content.

Název v anglickém jazyce

Signal traits and oxidative stress: a comparative study across populations with divergent signals

Popis výsledku anglicky

Diverging populations often shift patterns of signal use – a process that can contribute to reproductive isolation and speciation. Yet it is not clear why most traits gain or lose signal value during divergence. One reason this could occur is because changes in the relationship between signals and relevant physiological parameters degrade the reliability of a signal, or even change its underlying information content. Here we test whether signal trait elaboration is differently related to a central component of organismal health – oxidative stress – across populations that differ in signal use and preferences. In the recently diverged barn swallow subspecies complex (Hirundo rustica), different populations use different traits as sexual signals. Two of these traits, ventral breast plumage color and tail streamer length, differ markedly between North American H. r. erythrogaster and European H. r. rustica. Despite this divergence, variation in ventral plumage color was similarly associated with measures of oxidative damage across both populations. However, the directionality of these relationships differed between the sexes: darker male barn swallows had higher levels of plasma oxidative damage than their lighter counterparts, while the opposite relationship was seen in females. In contrast, relationships between tail streamer length and measures of oxidative stress were not consistent across populations. In European H. r. rustica, where males bearing elongated streamers are preferred as mates, longer-streamered males appeared to be more oxidatively stressed, whereas the opposite pattern was suggested in North American H. r. erythrogaster. Overall, our results suggest that while some phenotypic traits appear to be capable of conveying similar physiological information regardless of their use as signals, divergence in other phenotypic traits may be associated with shifts in their information content.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

<a href="/cs/project/LH14045" target="_blank" >LH14045: Evoluce pohlavních ornamentů a jejich informačního významu: srovnávací studie v populacích s divergentními signálními znaky a preferencemi</a><br>

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

Frontiers in Ecology and Evolution

ISSN

2296-701X

e-ISSN

2296-701X

Svazek periodika

4

Číslo periodika v rámci svazku

56

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

56

Kód UT WoS článku

000517761700056

EID výsledku v databázi Scopus

2-s2.0-85018029294