Changes in the adult sex ratio of six duck species breeding populations over two decades
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F24%3A100673" target="_blank" >RIV/60460709:41330/24:100673 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.avrs.2024.100187" target="_blank" >https://doi.org/10.1016/j.avrs.2024.100187</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.avrs.2024.100187" target="_blank" >10.1016/j.avrs.2024.100187</a>
Alternative languages
Result language
angličtina
Original language name
Changes in the adult sex ratio of six duck species breeding populations over two decades
Original language description
Despite all efforts, long-term changes in the adult sex ratios of breeding duck populations are still unclear; this uncertainty is especially true for male -bias populations, which are often under the scrutiny of researchers lacking convenient results for the active protection of endangered species. Species with male -bias populations are usually strongly affected by a decline in population size that leads to a higher extinction risk. In this study, we examined our long-term data of the abundance of breeding populations in six duck species (Mallard Anas platyrhynchos , Gadwall Mareca strepera , Red -crested Pochard Netta rufina , Common Pochard Aythya ferina , Tufted Duck Aythya fuligula , and Common Goldeneye Bucephala clangula ) from fishponds in South Bohemia, Czechia, between 2004 and 2022. This evidence was used to assess long-term changes in the adult sex ratio in these breeding populations and investigate the possible effects of the NAO index (North Atlantic Oscillation index) on them, indicating climate conditions in winter. We determined a long-term decrease of the proportion of females in the breeding season in two of the six examined species: Common Pochard and Red -crested Pochard, which is driven by the long-term increase in the number of males in contrast to the decreasing or stable number of females likely caused by different migration behaviours between females and males. In the case of Common Pochard, in breeding populations, we estimated 60 -65% of males in the early 2000s rising to 75 -80% in the early 2020s. However, we establish no significant effects linked to climate conditions of the previous winter in these species as a crucial cause of the changes of the proportion of females in the breeding population.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
<a href="/en/project/SS01010280" target="_blank" >SS01010280: Fishpond management optimization as a tool to biodiversity conservation under climate change</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Avian Research
ISSN
2053-7166
e-ISSN
2053-7166
Volume of the periodical
15
Issue of the periodical within the volume
2024
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
1-9
UT code for WoS article
001249366800001
EID of the result in the Scopus database
2-s2.0-85195602180