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Sexual coloration and sperm performance in the Australian painted dragon lizard, Ctenophorus pictus

Artikel i vetenskaplig tidskrift
Författare C. S. McDiarmid
C. R. Friesen
C. Ballen
Mats Olsson
Publicerad i J Evol Biol
Volym 30
Nummer/häfte 7
Sidor 1303-1312
ISSN 1010-061X
Publiceringsår 2017
Publicerad vid Institutionen för biologi och miljövetenskap
Sidor 1303-1312
Språk English
Länkar doi.org/10.1111/jeb.13092
Ämnesord female choice, lizard, post-copulatory, precopulatory, sexual selection, sperm competition, trade-offs, alternative reproductive strategies, extra-pair paternity, female, choice, trade-off, artificial-insemination, colorful males, seminal, fluid, mate choice, competition, selection, Environmental Sciences & Ecology, Evolutionary Biology, Genetics &, Heredity, wsbury da, 1982, american naturalist, v119, p601, lstad i, 1992, american naturalist, v139, p603
Ämneskategorier Biologiska vetenskaper

Sammanfattning

Theory predicts trade-offs between pre- and post-copulatory sexually selected traits. This relationship may be mediated by the degree to which males are able to monopolize access to females, as this will place an upper limit on the strength of post-copulatory selection. Furthermore, traits that aid in mate monopolization may be costly to maintain and may limit investment in post-copulatory traits, such as sperm performance. Australian painted dragons are polymorphic for the presence or absence of a yellow gular patch (bibs'), which may aid them to monopolize access to females. Previous work has shown that there are physiological costs of carrying this bib (greater loss of body condition in the wild). Here, we show that male painted dragons use this bright yellow bib as both an inter- and intrasexual signal, and we assess whether this signal is traded off against sperm performance within the same individuals. We found no relationship between aspects of bib colour and sperm swimming velocity or percentage of motile sperm and suggest that the bib polymorphism may be maintained by complex interactions between physiological or life-history traits including other sperm or ejaculate traits and environmental influences.

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