Speaker: Andi Stephens, Northwest Fisheries Science Center, NOAA located at the Hatfield Marine Science Center
Topic: Analysis of radiocarbon readings from fish otoliths to validate aging methods used in stock assessments
Age validation has long been recognized as critical to the assessment process. It is analogous to calibrating scientific instruments. Imprecision occurs when multiple reads report different ages, and bias is a systematic under- or over-estimation; these are confounded in aging lab settings. Imprecision in terms of between-reader variability can be quantified and addressed, for example using age-error matrices in stock assessment models. Bias can only be uncovered by an age-validation study. I will discuss these issues and present several examples of recent work.
1-971-247-1195 US Meeting ID: 945 5573 1151
Thursday, December 16 at 3:30pm to 4:30pmVirtual Event