Stevens et al.: Radiometric validation of age, growth, and longevity of Sebastes melanostomus 



717 



Table 4 



Summary of radiometric results for pooled otolith age groups. Samples are listed in order of increasing age-group range. Activi- 

 ties are expressed as disintegrations per minute, per gram (dpm/g). Radium-226 activity was averaged among samples with low- 

 analytical error (<10%; n=l) and was determined to be 0.0643 (±0.0035) dpm/g. This value was then applied to all samples to 

 gain an estimate of 226 Ra activity and radiometric age. Agreement between radiometric age and predicted age was qualified by 

 the degree of overlap between the two age ranges. Radiometric age incorporates the time between capture and analysis. 



' Error calculation based on the standard deviation of 210 Pb activity (Wanget al., 1975). 



2 Predicted age range was extended by 14.6% of coefficient of variation (CV) associated with growth-zone-derived age estimates. 



3 The average predicted age of each radiometric age group. 



4 Definition of terms: Exceeds = radiometric age range is greater than predicted age range; Overlaps = radiometric age range partially agrees with 

 predicted age range; Encompasses = radiometric age range was in agreement with predicted age range. 



