Long-term increase in female body condition and its effect on reproduction in two European red-listed species, Common Pochard (Aythya ferina) and Tufted Duck (Aythya fuligula)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F23%3A97567" target="_blank" >RIV/60460709:41330/23:97567 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1111/ibi.13208" target="_blank" >http://dx.doi.org/10.1111/ibi.13208</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/ibi.13208" target="_blank" >10.1111/ibi.13208</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Long-term increase in female body condition and its effect on reproduction in two European red-listed species, Common Pochard (Aythya ferina) and Tufted Duck (Aythya fuligula)

Popis výsledku v původním jazyce

Body condition of breeding females is an important driver of an individual's fitness and the consequent dynamics of populations. Long-term changes in female body condition are likely to be affected by recent shifts in climatic and environmental conditions that can result in changes to population demography. To help explain the drivers shaping body condition during the incubation period and its consequences for reproductive success, we examined the long-term pattern in the body condition of breeding females of two declining sympatric diving duck species: Common Pochard Aythya ferina and Tufted Duck Aythya fuligula. We analysed the data obtained from 139 females of Common Pochard and 251 females of Tufted Duck breeding on fishponds in South Bohemia, Czechia, between 2004 and 2020. We calculated the body condition index of females during late incubation based on the residuals from the relationship between body mass and tarsus length and used the incubation stage as an additional predictor of body mass. Body condition of both species did not decline over the 17 years of the study. The effect of winter weather conditions (winter temperature), water transparency (a proxy for food availability) and reproductive investment on body condition was not confirmed. Female body condition positively affected mean egg mass and hatchability in both studied species, i.e. females in better body condition laid larger eggs and hatched eggs with a higher hatching probability. We conclude that the population declines of the studied species are probably not connected to decreasing body condition of breeding females, but other reasons such as change in breeding propensity or offspring survival and recruitment should be considered in future studies.

Název v anglickém jazyce

Long-term increase in female body condition and its effect on reproduction in two European red-listed species, Common Pochard (Aythya ferina) and Tufted Duck (Aythya fuligula)

Popis výsledku anglicky

Body condition of breeding females is an important driver of an individual's fitness and the consequent dynamics of populations. Long-term changes in female body condition are likely to be affected by recent shifts in climatic and environmental conditions that can result in changes to population demography. To help explain the drivers shaping body condition during the incubation period and its consequences for reproductive success, we examined the long-term pattern in the body condition of breeding females of two declining sympatric diving duck species: Common Pochard Aythya ferina and Tufted Duck Aythya fuligula. We analysed the data obtained from 139 females of Common Pochard and 251 females of Tufted Duck breeding on fishponds in South Bohemia, Czechia, between 2004 and 2020. We calculated the body condition index of females during late incubation based on the residuals from the relationship between body mass and tarsus length and used the incubation stage as an additional predictor of body mass. Body condition of both species did not decline over the 17 years of the study. The effect of winter weather conditions (winter temperature), water transparency (a proxy for food availability) and reproductive investment on body condition was not confirmed. Female body condition positively affected mean egg mass and hatchability in both studied species, i.e. females in better body condition laid larger eggs and hatched eggs with a higher hatching probability. We conclude that the population declines of the studied species are probably not connected to decreasing body condition of breeding females, but other reasons such as change in breeding propensity or offspring survival and recruitment should be considered in future studies.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10615 - Ornithology

Projekt

<a href="/cs/project/SS01010280" target="_blank" >SS01010280: Optimalizace managementu rybničních lokalit směřující k zachování biodiversity v podmínkách klimatických změn</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

IBIS

ISSN

0019-1019

e-ISSN

0019-1019

Svazek periodika

165

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

18

Strana od-do

1217-1234

Kód UT WoS článku

000970374200001

EID výsledku v databázi Scopus

2-s2.0-85152802070