Sperm competition risk drives plasticity in seminal fluid composition
نویسندگان
چکیده
منابع مشابه
Sperm competition risk drives rapid ejaculate adjustments mediated by seminal fluid
In many species, males can make rapid adjustments to ejaculate performance in response to sperm competition risk; however, the mechanisms behind these changes are not understood. Here, we manipulate male social status in an externally fertilising fish, chinook salmon (Oncorhynchus tshawytscha), and find that in less than 48 hr, males can upregulate sperm velocity when faced with an increased ri...
متن کاملSperm competition risk generates phenotypic plasticity in ovum fertilizability.
Theory predicts that sperm competition will generate sexual conflict that favours increased ovum defences against polyspermy. A recent study on house mice has shown that ovum resistance to fertilization coevolves in response to increased sperm fertilizing capacity. However, the capacity for the female gamete to adjust its fertilizability as a strategic response to sperm competition risk has nev...
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Male seminal fluid proteins are known to affect female reproductive behavior and physiology by reducing mating receptivity and by increasing egg production rates. Such substances are also though to increase the competitive fertilization success of males, but the empirical foundation for this tenet is restricted. Here, we examined the effects of injections of size-fractioned protein extracts fro...
متن کاملPerceived sperm competition intensity influences seminal fluid protein production prior to courtship and mating.
Sperm competition is a potent postcopulatory selective force where sperm from rival males compete to fertilize a limited set of ova. Considering that sperm production is costly, we expect males to strategically allocate sperm in accordance with the level of competition. Accordingly, previous work has examined a male's strategic allocation in terms of sperm number. However, the seminal fluid pro...
متن کاملOntogenetic changes in seminal fluid gene expression and the protein composition of cricket seminal fluid.
The ejaculates of most internally fertilizing species consists of both sperm and seminal fluid proteins. Seminal fluid proteins have been studied largely in relation to their post-mating effects on female reproductive physiology, and predominantly in genomically well-characterized species. Seminal fluids can also play important roles in sperm maturation and performance. In the field cricket Tel...
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ژورنال
عنوان ژورنال: BMC Biology
سال: 2015
ISSN: 1741-7007
DOI: 10.1186/s12915-015-0197-2