Inbreeding Effects on Immune Response in Song Sparrows
Author Information
Author(s): Reid Jane M, Arcese Peter, Keller Lukas F, Elliott Kyle H, Sampson Laura, Hasselquist Dennis
Primary Institution: University of Aberdeen
Hypothesis
Does inbreeding affect the immune response in free-living song sparrows?
Conclusion
Inbreeding negatively impacts immune responses in song sparrows, with effects varying by sex.
Supporting Evidence
- Inbreeding depression was observed in immune responses to both PHA and DTV.
- PHA response declined more in males than females.
- Tetanus response declined with inbreeding in females but not in males.
- Diphtheria response tended to decline with increasing inbreeding coefficient.
Takeaway
When song sparrows have babies with close relatives, their ability to fight off sickness gets worse, especially in males.
Methodology
The study involved measuring immune responses to phytohaemagglutinin and diphtheria-tetanus vaccine in a pedigreed population of song sparrows over multiple years.
Potential Biases
Extra-pair fertilizations could introduce error into estimates of inbreeding coefficients.
Limitations
The study may underestimate inbreeding depression due to potential paternity errors in the pedigree.
Participant Demographics
The study focused on a free-living population of song sparrows on Mandarte Island, Canada.
Statistical Information
P-Value
p<0.05
Confidence Interval
95% CI varies by response type
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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