Fluctuating food supply affects the clutch size of Tengmalm's owl independent of laying date

@article{Korpimki1991FluctuatingFS,
  title={Fluctuating food supply affects the clutch size of Tengmalm's owl independent of laying date},
  author={Erkki Korpim{\"a}ki and Harri Hakkarainen},
  journal={Oecologia},
  year={1991},
  volume={85},
  pages={543-552}
}
In western Finland, yearly median laying dates of Tengmalm's owls varied from 14 March to 27 April during 1973–1989 and were negatively correlated with the winter densities of voles. Yearly mean clutch sizes varied from 4.0 to 6.7 and were more closely related to the spring than to the winter densities of voles. The yearly mean clutch size decreased with yearly median laying date. The 3-year vole population cycle is typical of the study area. The start of egg-laying was earliest in the peak… CONTINUE READING
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