Age-specific survival in an English Twite population

Like many bird species associated with agricultural habitats in the UK, the Twite Linaria flavirostris has undergone severe declines over recent decades due to habitat degradation, with populations in England, Wales and Ireland now restricted to a few small pockets. However, the demographic drivers...

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Vydané v:bioRxiv
Hlavní autori: Gkourtsouli-Antoniadou, Ismini, Ewing, Steven R, Hudson, George, Pearson, Michael A, Schroeder, Julia, Welch, Peter E, Wilkinson, Nicholas, Dunning, Jamie
Médium: Paper
Jazyk:English
Vydavateľské údaje: Cold Spring Harbor Cold Spring Harbor Laboratory Press 25.11.2021
Cold Spring Harbor Laboratory
Vydanie:1.1
Predmet:
Age
Ecology
Emigration
Juveniles
Linaria flavirostris
Population
Population decline
Survival
Twite
conservation
population decline
capture-mark-resight
survival
ISSN:2692-8205, 2692-8205
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Popis
Shrnutí:Like many bird species associated with agricultural habitats in the UK, the Twite Linaria flavirostris has undergone severe declines over recent decades due to habitat degradation, with populations in England, Wales and Ireland now restricted to a few small pockets. However, the demographic drivers of these declines are still largely unresolved. We estimated the survival of Twite from a small population at the southernmost edge of the English range in Derbyshire using capture-mark-recapture data from 2016–2019. Annual apparent survival for juveniles (0.14–0.34) was lower than for adults (0.29–0.56) and less than that of other Cardueline finches. Our results suggest that low juvenile survival may be one demographic driver underpinning the recent decline of the Derbyshire Twite population, although we also cannot rule out the possibility that differences in emigration of juveniles and adults from the population also contribute to the observed age-specific apparent survival rates. Competing Interest Statement The authors have declared no competing interest.
Bibliografia:SourceType-Working Papers-1
ObjectType-Working Paper/Pre-Print-1
content type line 50
Competing Interest Statement: The authors have declared no competing interest.
ISSN:2692-8205
2692-8205
DOI:10.1101/2021.11.24.469575