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Sons are made from old stores: sperm storage effects on sex ratio in a lizard

Olsson, Mats; Schwartz, Tonia; Uller, Tobias LU and Healey, Mo (2007) In Biology Letters 3(5). p.491-493
Abstract
Sperm storage is a widespread phenomenon across taxa and mating systems but its consequences for central fitness parameters, such as sex ratios, has rarely been investigated. In Australian painted dragon lizards (Ctenophorus pictus), we describe elsewhere that male reproductive success via sperm competition is largely an effect of sperm storage. That is, sperm being stored in the female reproductive tract out-compete more recently inseminated sperm in subsequent ovarian cycles. Here we look at the consequences of such sperm storage for sex allocation in the same species, which has genetic sex determination. We show that stored sperm have a 23% higher probability of producing sons than daughters. Thus, shifts in sex ratio, for example over... (More)
Sperm storage is a widespread phenomenon across taxa and mating systems but its consequences for central fitness parameters, such as sex ratios, has rarely been investigated. In Australian painted dragon lizards (Ctenophorus pictus), we describe elsewhere that male reproductive success via sperm competition is largely an effect of sperm storage. That is, sperm being stored in the female reproductive tract out-compete more recently inseminated sperm in subsequent ovarian cycles. Here we look at the consequences of such sperm storage for sex allocation in the same species, which has genetic sex determination. We show that stored sperm have a 23% higher probability of producing sons than daughters. Thus, shifts in sex ratio, for example over the reproductive season, can partly be explained by different survival of son-producing sperm or some unidentified female mechanism taking effect during prolonged storage. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Biology Letters
volume
3
issue
5
pages
491 - 493
publisher
Royal Society
external identifiers
  • scopus:35548966654
ISSN
1744-9561
DOI
10.1098/rsbl.2007.0196
language
English
LU publication?
no
id
1e418186-6e90-4cbf-b67c-533036c9546e (old id 4731512)
date added to LUP
2014-11-11 13:00:25
date last changed
2017-11-12 03:17:47
@article{1e418186-6e90-4cbf-b67c-533036c9546e,
  abstract     = {Sperm storage is a widespread phenomenon across taxa and mating systems but its consequences for central fitness parameters, such as sex ratios, has rarely been investigated. In Australian painted dragon lizards (Ctenophorus pictus), we describe elsewhere that male reproductive success via sperm competition is largely an effect of sperm storage. That is, sperm being stored in the female reproductive tract out-compete more recently inseminated sperm in subsequent ovarian cycles. Here we look at the consequences of such sperm storage for sex allocation in the same species, which has genetic sex determination. We show that stored sperm have a 23% higher probability of producing sons than daughters. Thus, shifts in sex ratio, for example over the reproductive season, can partly be explained by different survival of son-producing sperm or some unidentified female mechanism taking effect during prolonged storage.},
  author       = {Olsson, Mats and Schwartz, Tonia and Uller, Tobias and Healey, Mo},
  issn         = {1744-9561},
  language     = {eng},
  number       = {5},
  pages        = {491--493},
  publisher    = {Royal Society},
  series       = {Biology Letters},
  title        = {Sons are made from old stores: sperm storage effects on sex ratio in a lizard},
  url          = {http://dx.doi.org/10.1098/rsbl.2007.0196},
  volume       = {3},
  year         = {2007},
}