Immune Activation Reduces Sperm Quality in the Great Tit
Author Information
Author(s): Losdat Sylvain, Richner Heinz, Blount Jonathan D., Helfenstein Fabrice
Primary Institution: Institute of Ecology and Evolution, University of Bern, Bern, Switzerland
Hypothesis
Does mounting an immune response affect sperm quality through oxidative stress?
Conclusion
The study found that immune activation leads to a decline in sperm swimming velocity, indicating a cost to male reproductive success.
Supporting Evidence
- Immune activation induced a steeper decline in sperm swimming velocity.
- Sperm oxidative damage was negatively correlated with sperm swimming velocity.
- More colorful males had higher sperm swimming velocity towards the end of the breeding cycle.
Takeaway
When male great tits get sick, their sperm doesn't swim as well, which can make it harder for them to have babies.
Methodology
The study involved immune-challenging male great tits and assessing sperm quality and oxidative damage in a natural population.
Limitations
The study only measured sperm quality at two time points and did not monitor the entire spermatogenesis cycle.
Participant Demographics
Male great tits from a natural population in Bern, Switzerland.
Statistical Information
P-Value
0.025
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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