TOMASEK, O., J. ALBRECHTOVA, M. NEMCOVA, Pavlína OPATOVÁ and T. ALBRECHT. Trade-off between carotenoid-based sexual ornamentation and sperm resistance to oxidative challenge. Proceedings of the Royal Society B-Biological Sciences. LONDON: ROYAL SOC, vol. 284, No 1847, p. nestránkováno, 9 pp. ISSN 0962-8452. doi:10.1098/rspb.2016.2444. 2017.
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Basic information
Original name Trade-off between carotenoid-based sexual ornamentation and sperm resistance to oxidative challenge
Authors TOMASEK, O. (203 Czech Republic, guarantor), J. ALBRECHTOVA (203 Czech Republic), M. NEMCOVA (203 Czech Republic), Pavlína OPATOVÁ (203 Czech Republic, belonging to the institution) and T. ALBRECHT (203 Czech Republic).
Edition Proceedings of the Royal Society B-Biological Sciences, LONDON, ROYAL SOC, 2017, 0962-8452.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10600 1.6 Biological sciences
Country of publisher United Kingdom of Great Britain and Northern Ireland
Confidentiality degree is not subject to a state or trade secret
Impact factor Impact factor: 4.847
RIV identification code RIV/00216224:14310/17:00097562
Organization unit Faculty of Science
Doi http://dx.doi.org/10.1098/rspb.2016.2444
UT WoS 000393414300014
Keywords in English sexual selection; phenotype-linked fertility hypothesis; sperm competition theory; ejaculate quality; lutein; zeaxanthin
Tags NZ, rivok
Changed by Changed by: Ing. Nicole Zrilić, učo 240776. Changed: 12/4/2018 16:36.
Abstract
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.
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