He et al.: Interactions of age-dependent mortality and selectivity functions in age-based stock assessment models 
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M MJO 
Age Age 
Figure 7 
True selectivity from simulation models and estimated selectivity from stock syn- 
thesis assessment models (run 1 to run 8). The run number are shown in the 
upper left of each graph. Solid lines are true selectivity and thick dashed lines are 
median selectivity from assessment models. Thin dashed lines are 2.5% and 97.5% 
quantiles from assessment outputs. Specifications for each panel are: M = constant 
M and MJO=high M in juvenile and old fish; L/L=logistic selectivity in both simu- 
lation and assessment models; D/D = double normal selectivity in both simulation 
and assessment models; D/L = double normal selectivity in simulation model, but 
logistic selectivity in assessment model; and L/D = logistic selectivity in simulation 
model, but double normal selectivity in assessment model. 
there were close to 90% of runs with /i = 1.0 (Fig. 10). 
If double normal selectivity functions were used and 
natural mortality was constant in both simulation 
and assessment models (run 11), 17% of runs settled 
on the upper bound (h = 1.0) (Fig. 10). Results were 
similar even when natural mortality was high for 
both juvenile and old fish in the simulation model but 
was assumed to be constant in the assessment model 
