A male's seminal fluid increases later competitors’ productivity
| Autor: | Amanda J. Moehring, Trinh T. X. Nguyen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Male
0106 biological sciences 0301 basic medicine Seminal proteins Offspring Zoology Biology 010603 evolutionary biology 01 natural sciences Sexual Behavior Animal 03 medical and health sciences Semen Animals Drosophila Proteins Mating Productivity Sperm competition reproductive and urinary physiology Ecology Evolution Behavior and Systematics Competitor analysis Spermatozoa Sperm Repressor Proteins Drosophila melanogaster 030104 developmental biology Sexual selection Mutation Female |
| Zdroj: | Journal of Evolutionary Biology. 31:1572-1581 |
| ISSN: | 1010-061X |
| DOI: | 10.1111/jeb.13352 |
| Popis: | Polyandrous females allow for sexual selection to persist after mating. In the event that females successfully mate with more than one male, sperm competition can occur. Seminal fluid proteins can indirectly affect a male's success in sperm competition through reducing the remating behaviour of females and can directly influence sperm competition through directly displacing competitor sperm or inducing females to eject it. These direct effects on competitor sperm are thought to contribute to the 'second male advantage', whereby the second male to mate sires the majority of offspring. Here, we show an additional mechanism where seminal proteins already present within a mated female appear to enhance offspring production of later competitor males, and contribute to second male advantage. Counter to expectation, increased offspring production was not due to a priming effect of greater early female productivity, nor was it through a general and consistent increase in offspring production. Instead, enhanced productivity was solely through lengthening the time that offspring are sired by the second male, indicating that seminal proteins from the first male to mate may enhance second male advantage through a presumably unintended protective effect on subsequent competitor sperm. |
| Databáze: | OpenAIRE |
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