Atlantic Salmon Eggs Prefer Sperm with Similar Genes
Author Information
Author(s): Sarah E. Yeates, Sigurd Einum, Ian A. Fleming, Hendrik-Jan Megens, René J.M. Stet, Kjetil Hindar, William V. Holt, Katrien J.W. Van Look, Matthew J.G. Gage
Primary Institution: Norwegian Institute of Nature Research (NINA)
Hypothesis
Do Atlantic salmon eggs show a preference for sperm from males with similar major histocompatibility alleles?
Conclusion
Atlantic salmon males achieve greater fertilization success when competing for eggs from genetically similar females at the major histocompatibility class I locus.
Supporting Evidence
- Males won approximately 15% more fertilizations when competing for MH-similar females.
- Relative fertilization success was dependent on MH genetic similarity.
- Covariation with relative sperm velocity was significant.
Takeaway
Salmon eggs like sperm from males that are genetically similar to them, which helps their babies be healthier.
Methodology
In vitro fertilization competitions were conducted to assess sperm competition success based on major histocompatibility allele similarity.
Potential Biases
Potential biases in sperm competition dynamics due to environmental factors not accounted for.
Limitations
The study was conducted in a controlled environment, which may not fully replicate natural conditions.
Participant Demographics
41 male and 59 female Atlantic salmon from the River Imsa population.
Statistical Information
P-Value
0.025
Confidence Interval
Lower confidence limit=-22.06%, Upper confidence limit=-3.9%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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