Size sometimes matters: recognition of known predators with artificially altered body size by untrained birds

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10486198" target="_blank" >RIV/00216208:11310/24:10486198 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60076658:12310/24:43907974

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~W.pVopENB" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~W.pVopENB</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.anbehav.2023.12.017" target="_blank" >10.1016/j.anbehav.2023.12.017</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Size sometimes matters: recognition of known predators with artificially altered body size by untrained birds

Popis výsledku v původním jazyce

An integral characteristic of all predators is their size, which affects, among other things, their food preferences, and the ability of their prey to fight them off. Several studies have already found, unsurprisingly, that birds discriminate between and respond differently to predators of different sizes. The redbacked shrike, Lanius collurio, aggressively attacks the Eurasian jay, Garrulus glandarius, a common nest predator, whereas it remains passive towards the carrion crow, Corvus corone, which also commonly plunders passerine nests. A possible explanation may reside in the larger body size of crows. In our experiments, we exposed red-backed shrikes to downsized crow dummies and enlarged jay dummies. The shrikes responded to the largest jays with less aggression, suggesting that aggression towards the largest jays would increase risk of injury to parent shrikes and/or not increase the likelihood of offspring survival. In contrast, aggression increased only slightly towards the crows with reduced size. Thus, there was no general effect of body size on the attack rate of shrikes to the presented dummies. In the case of the crow, an alternative antipredator strategy, guarding and not attacking the predator, might affect the behaviour of some shrike parents. These results suggest that body size is one of the key parameters in the recognition of predators by red-backed shrikes, but it is evaluated differently in nest defence against two distinct predator species.

Název v anglickém jazyce

Size sometimes matters: recognition of known predators with artificially altered body size by untrained birds

Popis výsledku anglicky

An integral characteristic of all predators is their size, which affects, among other things, their food preferences, and the ability of their prey to fight them off. Several studies have already found, unsurprisingly, that birds discriminate between and respond differently to predators of different sizes. The redbacked shrike, Lanius collurio, aggressively attacks the Eurasian jay, Garrulus glandarius, a common nest predator, whereas it remains passive towards the carrion crow, Corvus corone, which also commonly plunders passerine nests. A possible explanation may reside in the larger body size of crows. In our experiments, we exposed red-backed shrikes to downsized crow dummies and enlarged jay dummies. The shrikes responded to the largest jays with less aggression, suggesting that aggression towards the largest jays would increase risk of injury to parent shrikes and/or not increase the likelihood of offspring survival. In contrast, aggression increased only slightly towards the crows with reduced size. Thus, there was no general effect of body size on the attack rate of shrikes to the presented dummies. In the case of the crow, an alternative antipredator strategy, guarding and not attacking the predator, might affect the behaviour of some shrike parents. These results suggest that body size is one of the key parameters in the recognition of predators by red-backed shrikes, but it is evaluated differently in nest defence against two distinct predator species.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10613 - Zoology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Animal Behaviour

ISSN

0003-3472

e-ISSN

1095-8282

Svazek periodika

209

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

001161334300001

EID výsledku v databázi Scopus

2-s2.0-85182010846