scholarly journals A mechanism for cryptic female choice in chinook salmon

2008 ◽  
Vol 19 (6) ◽  
pp. 1179-1185 ◽  
Author(s):  
Patrice Rosengrave ◽  
Neil J. Gemmell ◽  
Victoria Metcalf ◽  
Katherine McBride ◽  
Robert Montgomerie
Keyword(s):  
Female Choice ◽  
Chinook Salmon ◽  
Cryptic Female Choice

scholarly journals Male–female relatedness at specific SNP-linkage groups influences cryptic female choice in Chinook salmon ( Oncorhynchus tshawytscha )

2017 ◽  
Vol 284 (1859) ◽  
pp. 20170853 ◽  
Author(s):  
Cornelia Geßner ◽  
Sheri L. Johnson ◽  
Paul Fisher ◽  
Shannon Clarke ◽  
Kim Rutherford ◽  
...  
Keyword(s):  
Female Choice ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Fertilization Success ◽  
Cryptic Female Choice ◽  
Linkage Groups ◽  
Sperm Velocity ◽  
Ovarian Fluid ◽  
The Impact

In a range of taxa, the relatedness between mates influences both pre- and post-mating processes of sexual selection. However, relatively little is known about the genetic loci facilitating such a bias, with the exception of the major histocompatibility complex. Here, we performed tightly controlled replicated in vitro fertilization trials to explore the impact of relatedness on two possible mechanisms of cryptic female choice (CFC) in Chinook salmon ( Oncorhynchus tshawytscha ). We tested (i) whether relatedness of mates, assessed using 682 single nucleotide polymorphisms (SNPs) on 29 SNP-linkage groups (LGs), biases a male's sperm velocity in ovarian fluid (a parameter previously shown to predict male fertilization success), and (ii) whether relatedness of mates governs fertilization success via other mechanisms, probably via sperm–egg interactions. We found that relatedness on three LGs explained the variation in sperm velocity, and relatedness on two LGs explained fertilization success, which might indicate the presence of genes important in sperm–ovarian fluid and sperm–egg interactions in these genomic regions. Mapping of the SNPs on these LGs to the rainbow trout genome revealed two genes that affect fertility in humans and represent candidate genes for further studies. Our results thereby provide a novel contribution to the understanding of the mechanism of CFC.

scholarly journals Cryptic female choice enhances fertilization success and embryo survival in chinook salmon

2016 ◽  
Vol 283 (1827) ◽  
pp. 20160001 ◽  
Author(s):  
Patrice Rosengrave ◽  
Robert Montgomerie ◽  
Neil Gemmell
Keyword(s):  
Female Choice ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Genetic Relatedness ◽  
Fertilization Success ◽  
Cryptic Female Choice ◽  
Embryo Survival ◽  
Sperm Swimming Speed ◽  
Fertilization Experiments

In this study, we investigated two potentially important intersexual postcopulatory gametic interactions in a population of chinook salmon ( Oncorhynchus tshawytscha ): (i) the effect of female ovarian fluid (OF) on the behaviour of spermatozoa during fertilization and (ii) the effects of multilocus heterozygosity (MLH) (as an index of male quality) and female–male genetic relatedness on sperm behaviour and male fertilization success when there is sperm competition in the presence of that OF. To do this, we conducted a series of in vitro competitive fertilization experiments and found that, when ejaculates from two males are competing for access to a single female's unfertilized eggs, fertilization success was significantly biased towards the male whose sperm swam fastest in the female's OF. Embryo survival—a measure of fitness—was also positively correlated with both sperm swimming speed in OF and male MLH, providing novel evidence that cryptic female choice is adaptive for the female, enhancing the early survival of her offspring and potentially influencing her fitness.

Sign in / Sign up

Export Citation Format

Share Document