Kimura and Lyons: Between-reader bias and variability in age-determinations 



59 



*-* YELLOWFIN SOLE 

 CV = 0.032 



10 15 20 

 AGE (YR) 



10 15 20 

 AGE (YR) 



SABLEFISH 

 CV = 0.129 



15 20 

 AGE (YR) 



10 15 20 

 AGE (YR) 



25 



^0 



Figure 1 



Predicted percentage agreement curves assuming different coefficients of variation and normally distributed error 

 (upper left); overlayed with estimated percentage agreements for yellowfin sole (upper right); overlayed with estimated 

 percentage agreements for pollock (lower left); and overlayed with estimated percentage agreements for sablefish 

 (lower right). 



Citations 



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1983 The forgotten requirement for age validation in fisheries 



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 1987 Current trends in age determination methodology. In 



Summerfelt, R.C., and G.E. Hall (eds.), Age and growth of fish, 



p. 15-42. Iowa State Univ. Press, Ames. 

 Beamish, R.J., G.A. McFarlane, and D.E. Chilton 



1983 Use of oxytetracycline and other methods to validate a 



method of age determination for sablefish (Anoplopoma fim- 

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 Bennett, J.T., G.W. Boehlert, and K.K. Turekian 



1982 Confirmation of longevity in Sebastes diploproa (Pisces: 

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Campana, S.E., K.C.T. Zwanenburg, and J.N. Smith 



1990 210 Pb/~ 6 Ra determination of longevity in redfish. Can. 

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 Cass, A.J., and R.J. Beamish 



1983 First evidence of validity of the fin-ray method of age 



