Počet záznamů: 1
Trade-off between carotenoid-based sexual ornamentation and sperm resistance to oxidative challenge
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SYSNO ASEP 0469909 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Trade-off between carotenoid-based sexual ornamentation and sperm resistance to oxidative challenge Tvůrce(i) Tomášek, Oldřich (UBO-W) RID, ORCID, SAI
Albrechtová, Jana (UBO-W) SAI, ORCID, RID
Němcová, M. (CZ)
Opatová, Pavlína (UBO-W) RID, ORCID, SAI
Albrecht, Tomáš (UBO-W) RID, SAI, ORCIDCelkový počet autorů 5 Číslo článku 20162444 Zdroj.dok. Proceedings of the Royal Society B-Biological Sciences. - : Royal Society Publishing - ISSN 0962-8452
Roč. 284, č. 1847 (2017)Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova sexual selection ; phenotype-linked fertility hypothesis ; sperm competition theory ; ejaculate quality ; lutein ; zeaxanthin Vědní obor RIV EG - Zoologie Obor OECD Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology CEP GAP506/12/2472 GA ČR - Grantová agentura ČR Institucionální podpora UBO-W - RVO:68081766 UT WOS 000393414300014 EID SCOPUS 85011101240 DOI https://doi.org/10.1098/rspb.2016.2444 Anotace It has been hypothesized that carotenoid-based sexual ornamentation signals male fertility and sperm competitive ability as both ornamentation and sperm traits may be co-affected by oxidative stress, resulting in positive covariation (the ‘redox-based phenotype-linked fertility hypothesis’, redox-based PLFH). On the other hand, the ‘sperm competition theory’ (SCT) predicts a trade-off between precopulatory and postcopulatory traits. Here, we manipulate oxidative status (using diquat dibromide) and carotenoid availability in adult zebra finch (Taeniopygia guttata) males in order to test whether carotenoid-based beak ornamentation signals, or is traded off against, sperm resistance to oxidative challenge. Initial beak colouration, but not its change during the experiment, was associated with effect of oxidative challenge on sperm velocity, such that more intense colouration predicted an increase in sperm velocity under control conditions but a decline under oxidative challenge. This suggests a long-term trade-off between ornament expression and sperm resistance to oxidative challenge. Shortening of the sperm midpiece following oxidative challenge further suggests that redox homeostasis may constrain sperm morphometry. Carotenoid supplementation resulted in fewer sperm abnormalities but had no effect on other sperm traits. Overall, our data challenge the redox-based PLFH, partially support the SCT and highlight the importance of carotenoids for normal sperm morphology. Pracoviště Ústav biologie obratlovců Kontakt Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Rok sběru 2018
Počet záznamů: 1