Advanced

Sperm storage and sperm competition across ovarian cycles in the dragon lizard Ctenophorus fordi

Uller, Tobias LU ; Schwartz, Tonia; Koglin, Troy and Olsson, Mats (2013) In Journal of Experimental Zoology A 319(7). p.404-408
Abstract
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Experimental Zoology A
volume
319
issue
7
pages
404 - 408
publisher
Wiley-Blackwell
external identifiers
  • Scopus:84880289169
DOI
10.1002/jez.1803
language
English
LU publication?
no
id
4b7d57dc-6d2e-4fcc-b214-79187544ef0c (old id 4738960)
date added to LUP
2014-11-07 15:31:47
date last changed
2016-10-13 04:47:36
@misc{4b7d57dc-6d2e-4fcc-b214-79187544ef0c,
  abstract     = {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.},
  author       = {Uller, Tobias and Schwartz, Tonia and Koglin, Troy and Olsson, Mats},
  language     = {eng},
  number       = {7},
  pages        = {404--408},
  publisher    = {ARRAY(0x9723590)},
  series       = {Journal of Experimental Zoology A},
  title        = {Sperm storage and sperm competition across ovarian cycles in the dragon lizard Ctenophorus fordi},
  url          = {http://dx.doi.org/10.1002/jez.1803},
  volume       = {319},
  year         = {2013},
}