Evaluation of scale pattern analysis for upper Cook Inlet sockeye salmon stocks
Waltemyer DL, Bue BG, Tarbox KE. 1996. Evaluation of scale pattern analysis for upper Cook Inlet sockeye salmon stocks. Alaska Fishery Research Bulletin. 3(2):69-81
We evaluated scale pattern analysis, specifically linear discriminant function analysis and bivariate normal-density countour plots, as a tool to identify sockeye salmon (Oncorhynchus nerka) stocks returning to Upper Cook Inlet. Overall mean classification accuracy for 3-way, Kenai-Kasilof-Susitna River discriminant models ranged from 62 and 75% for the years 1983-1988. Bivariate normal-density contour plots of scale variables revealed a lack of consistency in size andshape and had significant overlap among stocks. Significant temporal and sexual intrasystem differences in scale variables were detected. Scale pattern has not provided the precision needed to effectively manage salmon stocks returning to Upper Cook Inlet.
- Type
- Journal Article
- Authors
- Waltemyer, David; Bue, Brian; Tarbox, Kenneth
- Units
- LACL
- Keywords
- Fish, Management, Oncorhynchus nerka, scale pattern, Sockeye Salmon, Upper Cook Inlet