Počet záznamů: 1
Inter-annual repeatability and age-dependent changes in plasma testosterone levels in a longitudinally monitored free-living passerine bird
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SYSNO ASEP 0548739 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Inter-annual repeatability and age-dependent changes in plasma testosterone levels in a longitudinally monitored free-living passerine bird Tvůrce(i) Těšický, M. (CZ)
Krajzingrová, T. (CZ)
Eliáš, J. (CZ)
Velová, H. (CZ)
Svobodová, J. (CZ)
Bauerová, P. (CZ)
Albrecht, Tomáš (UBO-W) RID, SAI, ORCID
Vinkler, M. (CZ)Celkový počet autorů 8 Zdroj.dok. Oecologia. - : Springer - ISSN 0029-8549
Roč. 198, č. 1 (2022), s. 53-66Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Ageing ; Condition-related traits ; Immunity ; Ontogeny ; Passerine birds ; Repeatability ; Senescence ; Testosterone Vědní obor RIV EH - Ekologie - společenstva Obor OECD Ecology CEP GA15-11782S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UBO-W - RVO:68081766 UT WOS 000720694700001 EID SCOPUS 85119280939 DOI 10.1007/s00442-021-05077-5 Anotace While seasonal trends in testosterone levels are known from cross-cohort studies, data on testosterone inter-annual individual repeatability in wild birds are rare. Also, our understanding of hormonal age-dependent changes in testosterone levels is limited. We assessed plasma testosterone levels in 105 samples originating from 49 repeatedly captured free-living great tits (Parus major) sampled during the nesting to investigate their relative long-term repeatability and within-individual changes. Furthermore, we examined the inter-annual repeatability of condition-related traits (carotenoid- and melanin-based plumage ornamentation, ptilochronological feather growth rate, body mass, and haematological heterophil/lymphocyte ratio) and their relationships to testosterone levels. We show that testosterone levels are inter-annually repeatable in females, with a non-significant pattern in males, both in absolute values and individual ranks (indicating the maintenance of relative status in a population). In males, we found a quadratic dependence of testosterone levels on age, with a peak in midlife. In contrast, female testosterone levels showed no age-dependent trends. The inter-annual repeatability of condition-related traits ranged from zero to moderate and was mostly unrelated to plasma testosterone concentrations. However, males with elevated testosterone had significantly higher carotenoid-pigmented yellow plumage brightness, a trait presumably involved in mating. Showing inter-annual repeatability in testosterone levels, this research opens the way to further understanding the causes of variation in condition-related traits. Based on a longitudinal dataset, this study demonstrates that male plasma testosterone undergoes age-related changes that may regulate resource allocation. Our results thus suggest that, unlike females, male birds undergo hormonal senescence similar to mammals. Pracoviště Ústav biologie obratlovců Kontakt Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Rok sběru 2023 Elektronická adresa https://link.springer.com/article/10.1007%2Fs00442-021-05077-5
Počet záznamů: 1