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Trade-off between carotenoid-based sexual ornamentation and sperm resistance to oxidative challenge
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SYSNO ASEP 0469909 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Trade-off between carotenoid-based sexual ornamentation and sperm resistance to oxidative challenge Author(s) 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, ORCIDNumber of authors 5 Article number 20162444 Source Title Proceedings of the Royal Society B-Biological Sciences. - : Royal Society Publishing - ISSN 0962-8452
Roč. 284, č. 1847 (2017)Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords sexual selection ; phenotype-linked fertility hypothesis ; sperm competition theory ; ejaculate quality ; lutein ; zeaxanthin Subject RIV EG - Zoology OECD category Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology R&D Projects GAP506/12/2472 GA ČR - Czech Science Foundation (CSF) Institutional support UBO-W - RVO:68081766 UT WOS 000393414300014 EID SCOPUS 85011101240 DOI https://doi.org/10.1098/rspb.2016.2444 Annotation 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. Workplace Institute of Vertebrate Biology Contact Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Year of Publishing 2018
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