Unusual diet of brood parasite nestlings and its fitness consequences

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73585130" target="_blank" >RIV/61989592:15310/17:73585130 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.bioone.org/doi/10.1642/AUK-16-242.1" target="_blank" >http://www.bioone.org/doi/10.1642/AUK-16-242.1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1642/AUK-16-242.1" target="_blank" >10.1642/AUK-16-242.1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Unusual diet of brood parasite nestlings and its fitness consequences

Popis výsledku v původním jazyce

Avian brood parasitism provides a tractable system within which to study diverse aspects of animal ecology and evolution. Yet, parasite–host research has focused on specific adaptations and counter-adaptations, such as egg rejection by hosts and egg mimicry by parasites, leaving other aspects of these relationships poorly studied, including general life history traits of hosts that did not evolve as specific antiparasite defenses. In particular, the diet and fledging parameters (age, mass, success) of parasitic nestlings are poorly known, although they are central to our understanding of host selection and the potential for coevolution in parasite–host relationships. We focused on the diet composition and fledging parameters of parasitic Common Cuckoo (Cuculus canorus) nestlings raised by their only regular cavity-nesting host, the Common Redstart (Phoenicurus phoenicurus). In addition to invertebrates, both Common Cuckoo and Common Redstart nestlings were fed fruits and lizards by some host pairs. This is the first record of lizards being fed to Common Cuckoo nestlings by any host. Capitalizing on this unusual diet and between-host-pair variation (statistically confirmed by high repeatability of diet composition across host pairs), we tested for the first time whether nestling diet variation affected Common Cuckoo breeding success. Common Cuckoos, but not Common Redstarts, fed a combination of plants and vertebrates showed decreased fledging masses and delayed fledging. Common Cuckoos fed with plants (but not vertebrates) also had lower fledging masses. Vertebrates alone did not have any effects. Fledging success was not influenced. These patterns could not be explained by various potential confounding effects, including seasonal effects or inferior provisioning capacities of Common Redstarts feeding unusual diets. This suggests that plant and vertebrate material is digestible by Common Cuckoo nestlings but might cause ontogenetic stress. We show for the first time that diet composition may affect parasite success, not only at the level of host species, as documented by previous studies, but also intraspecifically (i.e. at the level of individual host pairs). Host diet selection may represent an important general life history trait that affects brood parasite fitness, even though it most likely did not evolve as a specific antiparasite defense.

Název v anglickém jazyce

Unusual diet of brood parasite nestlings and its fitness consequences

Popis výsledku anglicky

Avian brood parasitism provides a tractable system within which to study diverse aspects of animal ecology and evolution. Yet, parasite–host research has focused on specific adaptations and counter-adaptations, such as egg rejection by hosts and egg mimicry by parasites, leaving other aspects of these relationships poorly studied, including general life history traits of hosts that did not evolve as specific antiparasite defenses. In particular, the diet and fledging parameters (age, mass, success) of parasitic nestlings are poorly known, although they are central to our understanding of host selection and the potential for coevolution in parasite–host relationships. We focused on the diet composition and fledging parameters of parasitic Common Cuckoo (Cuculus canorus) nestlings raised by their only regular cavity-nesting host, the Common Redstart (Phoenicurus phoenicurus). In addition to invertebrates, both Common Cuckoo and Common Redstart nestlings were fed fruits and lizards by some host pairs. This is the first record of lizards being fed to Common Cuckoo nestlings by any host. Capitalizing on this unusual diet and between-host-pair variation (statistically confirmed by high repeatability of diet composition across host pairs), we tested for the first time whether nestling diet variation affected Common Cuckoo breeding success. Common Cuckoos, but not Common Redstarts, fed a combination of plants and vertebrates showed decreased fledging masses and delayed fledging. Common Cuckoos fed with plants (but not vertebrates) also had lower fledging masses. Vertebrates alone did not have any effects. Fledging success was not influenced. These patterns could not be explained by various potential confounding effects, including seasonal effects or inferior provisioning capacities of Common Redstarts feeding unusual diets. This suggests that plant and vertebrate material is digestible by Common Cuckoo nestlings but might cause ontogenetic stress. We show for the first time that diet composition may affect parasite success, not only at the level of host species, as documented by previous studies, but also intraspecifically (i.e. at the level of individual host pairs). Host diet selection may represent an important general life history trait that affects brood parasite fitness, even though it most likely did not evolve as a specific antiparasite defense.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10615 - Ornithology

Projekt

<a href="/cs/project/GAP506%2F12%2F2404" target="_blank" >GAP506/12/2404: Hostitelsko-parazitická interakce jako extrémní forma konfliktu rodič-potomek</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Auk: a quarterly journal of ornithology

ISSN

0004-8038

e-ISSN

—

Svazek periodika

134

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

19

Strana od-do

732-750

Kód UT WoS článku

000405095500021

EID výsledku v databázi Scopus

—