Do predator energy demands or previous exposure influence protection by aposematic coloration of prey?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F17%3A43895383" target="_blank" >RIV/60076658:12310/17:43895383 - isvavai.cz</a>

Výsledek na webu

<a href="https://academic.oup.com/cz/article/63/3/259/3057022/Do-predator-energy-demands-or-previous-exposure" target="_blank" >https://academic.oup.com/cz/article/63/3/259/3057022/Do-predator-energy-demands-or-previous-exposure</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/cz/zow057" target="_blank" >10.1093/cz/zow057</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Do predator energy demands or previous exposure influence protection by aposematic coloration of prey?

Popis výsledku v původním jazyce

Growing evidence exists that aposematic and toxic prey may be included in a predator&apos;s diet when the predator experiences physiological stress. The tree sparrow Passer montanus is known to have a significant portion of aposematic and toxic ladybirds in its natural diet. Here, we present experiments testing the attack and eating rate of the tree sparrow toward the invasive aposematic harlequin ladybird Harmonia axyridis. We wondered whether the sparrow&apos;s ability to prey on native ladybirds predisposes them to also prey on harlequin ladybirds. We compared the attack and eating rates of tree sparrows of particular age and/or experience classes to test for any changes during ontogeny (hand-reared x young wild-caught x adult wild-caught) and with differing perceived levels of physiological stress (summer adult x winter adult). Winter adult tree sparrows commonly attacked and ate the offered ladybirds with no evidence of disgust or metabolic difficulties after ingestion. Naive and wild immature tree sparrows attacked the ladybirds but hesitated to eat them. Adult tree sparrows caught in the summer avoided attacking the ladybirds. These results suggest that tree sparrows are able to cope with chemicals ingested along with the ladybirds. This preadaptation enables them to include ladybirds in their diet; though they commonly do this only in times of shortage in insect availability (winter). Young sparrows showed avoidance toward the chemical protection of the ladybirds.

Název v anglickém jazyce

Do predator energy demands or previous exposure influence protection by aposematic coloration of prey?

Popis výsledku anglicky

Growing evidence exists that aposematic and toxic prey may be included in a predator&apos;s diet when the predator experiences physiological stress. The tree sparrow Passer montanus is known to have a significant portion of aposematic and toxic ladybirds in its natural diet. Here, we present experiments testing the attack and eating rate of the tree sparrow toward the invasive aposematic harlequin ladybird Harmonia axyridis. We wondered whether the sparrow&apos;s ability to prey on native ladybirds predisposes them to also prey on harlequin ladybirds. We compared the attack and eating rates of tree sparrows of particular age and/or experience classes to test for any changes during ontogeny (hand-reared x young wild-caught x adult wild-caught) and with differing perceived levels of physiological stress (summer adult x winter adult). Winter adult tree sparrows commonly attacked and ate the offered ladybirds with no evidence of disgust or metabolic difficulties after ingestion. Naive and wild immature tree sparrows attacked the ladybirds but hesitated to eat them. Adult tree sparrows caught in the summer avoided attacking the ladybirds. These results suggest that tree sparrows are able to cope with chemicals ingested along with the ladybirds. This preadaptation enables them to include ladybirds in their diet; though they commonly do this only in times of shortage in insect availability (winter). Young sparrows showed avoidance toward the chemical protection of the ladybirds.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10614 - Behavioral sciences biology

Projekt

<a href="/cs/project/QH82047" target="_blank" >QH82047: Invazní slunéčko Harmonia axyridis - přínos pro biologickou ochranu rostlin nebo ohrožení biodiverzity?</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Current Zoology

ISSN

1674-5507

e-ISSN

—

Svazek periodika

63

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CN - Čínská lidová republika

Počet stran výsledku

9

Strana od-do

259-267

Kód UT WoS článku

000402561200004

EID výsledku v databázi Scopus

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