Probability of PCR success. Results of the binomial general additive model (black curve) comparing PCR success (1) to failure (0) relative to sample age. Data are slightly 'jittered' to reduce overlap of points. Gray curves are simulations in which data were thinned to an equal sampling effort.
Anderson-Carpenter et al. BMC Evolutionary Biology 2011 11:30 doi:10.1186/1471-2148-11-30