Son or daughter, it does not matter: brood parasites do not adjust offspring sex based on their own or host quality

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F20%3A43901460" target="_blank" >RIV/60076658:12310/20:43901460 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081766:_____/20:00524160

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s10336-020-01782-9" target="_blank" >https://link.springer.com/article/10.1007/s10336-020-01782-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10336-020-01782-9" target="_blank" >10.1007/s10336-020-01782-9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Son or daughter, it does not matter: brood parasites do not adjust offspring sex based on their own or host quality

Popis výsledku v původním jazyce

Sex allocation theory posits that parents should adjust offspring sex ratio based on the costs and benefits associated with the production of either sex in a given context. Maternal condition should influence sex ratios when it has sex-specific impacts on offspring fitness (Trivers-Willard hypothesis) or when rearing costs differ between sons and daughters (cost of reproduction hypothesis). In sexually size-dimorphic species, mothers in good condition are predicted to produce an excess of offspring of the larger sex, whereas mothers in poor condition the opposite. Brood parasites constitute an exciting model for testing sex allocation theory as parasitic females are freed from rearing costs while these costs are covered by the hosts. Here, we investigate the effect of maternal and host quality (both expressed as egg volume and blue-green chroma) on offspring sex allocation in the common cuckoo (Cuculus canorus) parasitizing the great reed warbler (Acrocephalus arundinaceus). We found no significant effect of parasite egg-laying date and maternal or host quality on sex ratio. One explanation may be that parasitic females, instead of investing in differential sex allocation, invest in securing egg acceptance by the host, by laying non-randomly within a host population to match the appearance of host clutches. Alternatively, male and female parasite eggs do not differ in size suggesting that their production bears comparable costs. This, together with the fact that the whole parental care is covered by the hosts, supports the previous findings that the common cuckoo does not adjust offspring sex ratio.

Název v anglickém jazyce

Son or daughter, it does not matter: brood parasites do not adjust offspring sex based on their own or host quality

Popis výsledku anglicky

Sex allocation theory posits that parents should adjust offspring sex ratio based on the costs and benefits associated with the production of either sex in a given context. Maternal condition should influence sex ratios when it has sex-specific impacts on offspring fitness (Trivers-Willard hypothesis) or when rearing costs differ between sons and daughters (cost of reproduction hypothesis). In sexually size-dimorphic species, mothers in good condition are predicted to produce an excess of offspring of the larger sex, whereas mothers in poor condition the opposite. Brood parasites constitute an exciting model for testing sex allocation theory as parasitic females are freed from rearing costs while these costs are covered by the hosts. Here, we investigate the effect of maternal and host quality (both expressed as egg volume and blue-green chroma) on offspring sex allocation in the common cuckoo (Cuculus canorus) parasitizing the great reed warbler (Acrocephalus arundinaceus). We found no significant effect of parasite egg-laying date and maternal or host quality on sex ratio. One explanation may be that parasitic females, instead of investing in differential sex allocation, invest in securing egg acceptance by the host, by laying non-randomly within a host population to match the appearance of host clutches. Alternatively, male and female parasite eggs do not differ in size suggesting that their production bears comparable costs. This, together with the fact that the whole parental care is covered by the hosts, supports the previous findings that the common cuckoo does not adjust offspring sex ratio.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10615 - Ornithology

Projekt

<a href="/cs/project/GA17-12262S" target="_blank" >GA17-12262S: Reprodukční strategie obligátního hnízdního parazita: výběr hostitele, alokace pohlaví mláďat a individuální úspěšnost</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of Ornithology

ISSN

2193-7192

e-ISSN

—

Svazek periodika

161

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

977-986

Kód UT WoS článku

000530198200001

EID výsledku v databázi Scopus

2-s2.0-85085131235