What question did this study set out to answer?

To introduce an accurate method for calculating avian nesting success that accounts for varying observation periods and eliminates discovery bias.

January 1, 1961Open Access

Nesting Success Calculated from Exposure

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Methodological analysis reveals an exposure-based model for avian nesting success, providing an unbiased estimate of daily survival rates.

To introduce an accurate method for calculating avian nesting success that accounts for varying observation periods and eliminates discovery bias.
Quantified nest observation time into units of exposure, defined as nest-days of observation.
Modeled daily mortality and survival rates across separate incubation and nestling periods.
Determined that traditional apparent success calculations substantially overestimate nest survival by ignoring nests that fail prior to discovery.
Showed that compounding daily survival rates over the total nesting cycle provides an unbiased estimate of overall reproductive success.

Harold Mayfield (1961) studied this question.

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Methodological analysis reveals an exposure-based model for avian nesting success, providing an unbiased estimate of daily survival rates.