Fig 6. Sensitivity of the difference between allowable and observed harvest of long-tailed duck to individual demographic parameters as measured by the slope of linear relationships between the harvest difference and standardized values of the demographic parameters, where greater absolute slope indicates higher sensitivity.

Slope is affected by both the inherent sensitivity of growth rate and, hence, allowable harvest, to each parameter and its relative proportional uncertainty. Bars reflecting relative proportional uncertainty represent the coefficient of variation for non-binomial parameters or concentration for binomial parameters and, in both cases, have been multiplied by 100 (divided by 1000 for eiders) for scaling and presentation purposes.