Non-Primate Mammal Sperm Competition
Post-copulatory scenario in which the sperm of males of polygamous species competes within the female genital tract to fertilize the oocyte.
In many non-primate mammalian species, females may mate with more than one male. According to the sperm competition theory, the reproductive success of the males of such species depends on both the magnitude of inter-male rivalry and covert sperm competition. When the ejaculates of two or more males must compete to fertilize a set of ova, the quality of the sperm they carry becomes of great importance. The transfer of large numbers of spermatozoa in competitive situations is an effective strategy; males that transfer more sperm per ejaculate, or who copulate more often, are more likely to sire offspring. Usually, males of polygamous species have large testes and produce ejaculates with many sperm cells....
KeywordsSperm Competition Sperm Quality Sperm Length Wild Ruminant Ruminant Species
- Asa, C., Esparza-Harris, K., Bauman, K., & Callahan, M. (2016). Ratios of testis volume to body size in monogamous gray wolves (Canis lupus) and promiscuous dogs (C. l. familiaris). Proceedings of the international symposium on canine and feline reproduction (p. 35). Paris.Google Scholar
- Pradiee, J., O’Brien, E., Esteso, M. C., Castaño, C., Toledano-Díaz, A., Lopez-Sebastián, A., Marcos-Beltrán, J. L., Vega, R. S., Guillamón, F. G., Martínez-Nevado, E., Guerra, R., & Santiago-Moreno, J. (2016). Effect of shortening the prefreezing equilibration time with glycerol on the quality of chamois (Rupicapra pyrenaica), ibex (Capra pyrenaica), mouflon (Ovis musimon) and aoudad (Ammotragus lervia) ejaculates. Animal Reproduction Science, 171, 121–128.CrossRefPubMedGoogle Scholar
- Santiago-Moreno, J., Pulido-Pastor, A., Toledano-Díaz, A., Coloma, M. A., Gómez-Brunet, A., & López-Sebastián, A. (2009). The use of reproductive technologies in the conservation of the Spanish ibex (Capra pyrenaica): A model for ex situ conservation of other threatened wild ruminants. In L. T. Dahnof (Ed.), Animal reproduction: New research developments (pp. 233–249). New York: Nova Publisher.Google Scholar
- Tourmente, M., Villar-Moya, P., Varea-Sánchez, M., Luque-Larena, J. J., Rial, E., & Roldan, E. R. S. (2015). Performance of rodent spermatozoa over time is enhanced by increased ATP concentrations: The role of sperm competition. Biology of Reproduction, 93(3), 64. doi:10.1095/biolreprod.114.127621.CrossRefPubMedGoogle Scholar