Till sidans topp

Sidansvarig: Webbredaktion
Sidan uppdaterades: 2012-09-11 15:12

Tipsa en vän
Utskriftsversion

Sperm Storage and Sperm C… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

Sperm Storage and Sperm Competition Across Ovarian Cycles in the Dragon Lizard, Ctenophorus fordi

Artikel i vetenskaplig tidskrift
Författare T. Uller
Thomas Schwartz
T. Koglin
Mats Olsson
Publicerad i Journal of Experimental Zoology Part a-Ecological Genetics and Physiology
Volym 319
Nummer/häfte 7
Sidor 404-408
ISSN 1932-5223
Publiceringsår 2013
Publicerad vid Institutionen för biologi och miljövetenskap
Sidor 404-408
Språk en
Länkar dx.doi.org/10.1002/jez.1803
Ämnesord sexual selection, mallee dragon, reptiles, paternity, behavior, females, males
Ämneskategorier Zoologi, Genetik, Zoofysiologi

Sammanfattning

Female sperm storage can influence male reproductive success and may favour males that produce sperm that remain viable across several ovarian cycles. Here we show that sperm are viable in the female reproductive tract across ovarian cycles in the mallee dragon, Ctenophorus fordi. Based on experimental mating trials, we show that stored sperm were generally less likely to fertilize eggs than recently inseminated sperm. The fertilization success of stored sperm increased with male body size relative to rivals. This may be due to differences in ejaculate volume or sperm number transferred by males of different sizes. However, there was no evidence that copulation time, which is correlated with ejaculate volume, contributed to fertilization success. We suggest that sperm storage across ovarian cycles may be common in small, multi-clutched lizards and that its impact on selection on male phenotypes could contribute to the evolution of lizard mating systems.

Sidansvarig: Webbredaktion|Sidan uppdaterades: 2012-09-11
Dela:

På Göteborgs universitet använder vi kakor (cookies) för att webbplatsen ska fungera på ett bra sätt för dig. Genom att surfa vidare godkänner du att vi använder kakor.  Vad är kakor?