RYMEŠOVÁ, Dana, Petr ŠMILAUER a Miroslav ŠÁLEK. Sex- and age-biased mortality in wild Grey Partridge Perdix perdix populations. IBIS. HOBOKEN: WILEY-BLACKWELL, 2012, roč. 154, č. 4, s. 815-824. ISSN 0019-1019. doi:10.1111/j.1474-919X.2012.01259.x.
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Základní údaje
Originální název Sex- and age-biased mortality in wild Grey Partridge Perdix perdix populations
Autoři RYMEŠOVÁ, Dana (203 Česká republika, garant, domácí), Petr ŠMILAUER (203 Česká republika) a Miroslav ŠÁLEK (203 Česká republika).
Vydání IBIS, HOBOKEN, WILEY-BLACKWELL, 2012, 0019-1019.
Další údaje
Originální jazyk angličtina
Typ výsledku Článek v odborném periodiku
Obor 10613 Zoology
Stát vydavatele Spojené státy
Utajení není předmětem státního či obchodního tajemství
WWW Full Text
Impakt faktor Impact factor: 2.361
Kód RIV RIV/00216224:14310/12:00060529
Organizační jednotka Přírodovědecká fakulta
Doi http://dx.doi.org/10.1111/j.1474-919X.2012.01259.x
UT WoS 000310738900014
Klíčová slova česky telemetrie; přežívání; Coxův model proporčních rizik
Klíčová slova anglicky Cox proportional hazard model; radiotracking; survival
Štítky AKR, rivok
Příznaky Mezinárodní význam, Recenzováno
Změnil Změnila: Mgr. Marie Šípková, DiS., učo 437722. Změněno: 16. 12. 2019 20:01.
Anotace
Differing reproductive effort, individual qualities and local environmental conditions can lead to uneven mortality risk among individuals within populations, and may result in survival differences according to age and sex. Identification of factors contributing to unequal operational sex ratios has been important for understanding population dynamics and conservation management. In this study, sex- and age-specific mortality was estimated in three wild Grey Partridge populations year round from analysis of radio-tracking data from a total of 168 individuals. Survival days were counted in three periods defined individually for each animal: the pairing period (covey break-up to laying of the first egg); the nesting period (between clutch initiation date and failure of the last nesting attempt, or the date when chicks were 14 days old); and the covey period (the end of the nesting period or joining a group until covey break-up). Predation was the main cause of mortality. A significant effect of age on survival was found during the pairing period, when older individuals paired off faster and survived better. The highest mortality risk overall was found during the nesting period. Furthermore, significantly higher mortality of females was recorded during the nesting period, suggesting that greater investments in reproduction, behaviour at the nest or the quality of nesting habitats can decrease survival of females and cause a male-biased sex ratio. No significant effect of age or sex was found during the covey period, nor for the year as a whole, but there was a significant difference in annual mortality rates between the three study populations. Our results confirm age- and sex-specific variation of adult mortality in a ground nesting bird with biparental care during the year-round cycle, documenting differing sensitivities of various population cohorts to predation.
VytisknoutZobrazeno: 8. 2. 2023 04:24