Attacks by predators on artificial cryptic and aposematic insect larvae

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F20%3A00523392" target="_blank" >RIV/60077344:_____/20:00523392 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12310/20:43900999

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/full/10.1111/eea.12877" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1111/eea.12877</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/eea.12877" target="_blank" >10.1111/eea.12877</a>

Result language

angličtina

Original language name

Attacks by predators on artificial cryptic and aposematic insect larvae

Original language description

Colour and colour patterns seem to be especially important visual warning signals for predators, which might have innate or learned ability to avoid aposematic prey. To test the importance of larval colour pattern of the aposematic ladybird Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), an invasive alien species in Europe, we presented the plasticine models of aposematic larvae to wild and naive birds. We studied the attacks on aposematic larvae of various patterns and colours in nature and in an outdoor aviary. The larvae were cryptic (green), aposematic (resembling those of the H. axyridis larvae), and semi-aposematic (i.e., black but missing the typical orange patches of H. axyridis larvae). We detected attacks on 71 larvae out of 450 (i.e., 2.6% daily predation). Twenty-nine attacks were made by birds, 37 by arthropods, and five by gastropods. Wild birds attacked green and black larvae significantly more often than aposematic larvae. Colour did not have an effect on attacks by arthropods. The experiment with naive birds was conducted in an outdoor aviary, where naive great tits, Parus major L., were offered the same artificial larvae as in the first experiment. In total, 57 of 90 exposed larvae were attacked by birds (i.e., 28% daily predation), and green larvae were attacked significantly more than the aposematic larvae (but not more than black larvae). Our results imply that aposematic larvae of H. axyridis are more than 12x less likely to be predated by birds than green larvae in nature. The aposematic pattern represented a more effective signal than the semi-aposematic signal. The ability to reject aposematic prey seemed to be innate in our birds.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10618 - Ecology

Project

<a href="/en/project/GJ18-23794Y" target="_blank" >GJ18-23794Y: Latitudinal trends in herbivore performance and herbivore damage in hostile and enemy free space</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

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

Name of the periodical

Entomologia Experimentalis et Applicata

ISSN

0013-8703

e-ISSN

—

Volume of the periodical

168

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

7

Pages from-to

184-190

UT code for WoS article

000514071200001

EID of the result in the Scopus database

2-s2.0-85079706499