SOURCE-LINKED STUDY SUMMARY
Rooftop Breeding Does Not Consistently Explain Variation in Yolk Testosterone in Herring Gulls.
Abstract summarized · Quality not appraised
- Studied
- A field study compared egg-yolk testosterone in rooftop- and ground-nesting herring gulls.
- Who / model
- Researchers examined the last-laid eggs across the 2023 and 2024 breeding seasons. Sample size is not stated.
- Studied dose & schedule
- Dose and schedule have not yet been extracted for this summary.
- Found
- Rooftop nests had higher yolk testosterone in 2023, but no difference was found in 2024. Nest density and measured indicators of maternal quality did not explain variation. This concerns natural hormone allocation in bird eggs.
- Limits
- Study limitations were not stated in the abstract. Methodological quality has not been appraised.
Read summary source ↗ · Prepared 9/15/2026 · AI-assisted, source-based summary
Research findings apply to the population and conditions studied. This educational summary is not a treatment recommendation or a formal assessment of study quality.
Original publication ↗ · DOI: 10.1002/ece3.74269