Abstract
Genetic benefits are potentially the most robust explanation of the controversial issue of evolutionary maintenance of polyandry, but the unambiguous demonstration of such benefits has been hindered by the possibility of their confusion with maternal effects. Previous research has shown that polyandrous bulb mite females produce daughters with higher fecundity than monandrous females. Here, we investigate whether this effect arises because polyandrous females invest more in their offspring, or because their offspring inherit 'good genes' from their fathers. Females were mated with either one or four (different) males. However, by sterilizing three of the four males with ionizing radiation, we eliminated any chance of sexual selection (in the polyandrous treatment) so that any differences in the female mating regimes must have been owing to maternal effects. Polyandry had no significant effect on daughter fecundity, thus indicating that any previously documented effects must have been genetic. This was further supported by a significant association between fathers' offensive sperm-competitive ability and the fecundity of their daughters. The association with fathers' sperm defensive ability was not significant, and neither was the association between fathers' sperm competitiveness and sons' reproductive success. However, sons of polyandrous females had lower reproductive success than sons of monandrous females. This shows that the maternal effects of polyandry should be taken into account whenever its costs and benefits are being considered.
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Selected References
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- Arnqvist G, Nilsson T. The evolution of polyandry: multiple mating and female fitness in insects. Anim Behav. 2000 Aug;60(2):145–164. doi: 10.1006/anbe.2000.1446. [DOI] [PubMed] [Google Scholar]
- Arnqvist Göran, Rowe Locke. Antagonistic coevolution between the sexes in a group of insects. Nature. 2002 Feb 14;415(6873):787–789. doi: 10.1038/415787a. [DOI] [PubMed] [Google Scholar]
- Chapman T., Liddle L. F., Kalb J. M., Wolfner M. F., Partridge L. Cost of mating in Drosophila melanogaster females is mediated by male accessory gland products. Nature. 1995 Jan 19;373(6511):241–244. doi: 10.1038/373241a0. [DOI] [PubMed] [Google Scholar]
- Clark A. G., Aguadé M., Prout T., Harshman L. G., Langley C. H. Variation in sperm displacement and its association with accessory gland protein loci in Drosophila melanogaster. Genetics. 1995 Jan;139(1):189–201. doi: 10.1093/genetics/139.1.189. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Eady P. E., Wilson N., Jackson M. Copulating with multiple mates enhances female fecundity but not egg-to-adult survival in the bruchid beetle Callosobruchus maculatus. Evolution. 2000 Dec;54(6):2161–2165. doi: 10.1111/j.0014-3820.2000.tb01259.x. [DOI] [PubMed] [Google Scholar]
- Hosken D. J., Garner T. W. J., Tregenza T., Wedell N., Ward P. I. Superior sperm competitors sire higher-quality young. Proc Biol Sci. 2003 Sep 22;270(1527):1933–1938. doi: 10.1098/rspb.2003.2443. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Jennions M. D., Petrie M. Why do females mate multiply? A review of the genetic benefits. Biol Rev Camb Philos Soc. 2000 Feb;75(1):21–64. doi: 10.1017/s0006323199005423. [DOI] [PubMed] [Google Scholar]
- Konior M., Radwan J., Kolodziejczyk M. Polyandry increases offspring fecundity in the bulb mite. Evolution. 2001 Sep;55(9):1893–1896. doi: 10.1111/j.0014-3820.2001.tb00838.x. [DOI] [PubMed] [Google Scholar]
- Pai Aditi, Yan Guiyun. Polyandry produces sexy sons at the cost of daughters in red flour beetles. Proc Biol Sci. 2002 Feb 22;269(1489):361–368. doi: 10.1098/rspb.2001.1893. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Prout T., Clark A. G. Seminal fluid causes temporarily reduced egg hatch in previously mated females. Proc Biol Sci. 2000 Jan 22;267(1439):201–203. doi: 10.1098/rspb.2000.0988. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Radwan J., Witaliński W. Sperm competition. Nature. 1991 Aug 22;352(6337):671–672. doi: 10.1038/352671b0. [DOI] [PubMed] [Google Scholar]
- Sakaluk Scott K., Schaus Jennifer M., Eggert Anne-Katrin, Snedden W. Andrew, Brady Pamela L. Polyandry and fitness of offspring reared under varying nutritional stress in decorated crickets. Evolution. 2002 Oct;56(10):1999–2007. doi: 10.1111/j.0014-3820.2002.tb00126.x. [DOI] [PubMed] [Google Scholar]
- Sheldon BC. Differential allocation: tests, mechanisms and implications. Trends Ecol Evol. 2000 Oct 1;15(10):397–402. doi: 10.1016/s0169-5347(00)01953-4. [DOI] [PubMed] [Google Scholar]
- Stutt A. D., Siva-Jothy M. T. Traumatic insemination and sexual conflict in the bed bug Cimex lectularius. Proc Natl Acad Sci U S A. 2001 May 1;98(10):5683–5687. doi: 10.1073/pnas.101440698. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tregenza Tom, Wedell Nina, Hosken David J., Ward Paul I. Maternal effects on offspring depend on female mating pattern and offspring environment in yellow dung flies. Evolution. 2003 Feb;57(2):297–304. doi: 10.1111/j.0014-3820.2003.tb00264.x. [DOI] [PubMed] [Google Scholar]
- Tregenza Tom, Wedell Nina. Polyandrous females avoid costs of inbreeding. Nature. 2002 Jan 3;415(6867):71–73. doi: 10.1038/415071a. [DOI] [PubMed] [Google Scholar]
- Ward P. I. Cryptic female choice in the yellow dung fly Scathophaga stercoraria (L.). Evolution. 2000 Oct;54(5):1680–1686. doi: 10.1111/j.0014-3820.2000.tb00712.x. [DOI] [PubMed] [Google Scholar]
- Watson PJ. Multi-male mating and female choice increase offspring growth in the spider Neriene litigiosa (Linyphiidae) Anim Behav. 1998 Feb;55(2):387–403. doi: 10.1006/anbe.1997.0593. [DOI] [PubMed] [Google Scholar]
- Wiklund C., Karlsson B., Leimar O. Sexual conflict and cooperation in butterfly reproduction: a comparative study of polyandry and female fitness. Proc Biol Sci. 2001 Aug 22;268(1477):1661–1667. doi: 10.1098/rspb.2001.1719. [DOI] [PMC free article] [PubMed] [Google Scholar]