Classifying Vistula and Pomeranian sea trout populations using discriminant functions based on selected scale characters
2010
Borzecka, I.,Inland Fisheries Institute, Olsztyn (Poland). Dept. of River Fisheries
The effectiveness of a discriminant function system based on selected scale characters of sea trout (Salmo trutta L.) populations from the Vistula River and Pomerania river (Grabowa River) was studied in Poland. Selected parameters of sea trout scales from comparable groups from the period prior to the mixing of the two populations were compiled and function effectiveness was tested. The reference discriminant functions obtained were used to classify the individuals from the mixed stock into corresponding groups. The best results (89.7 percent conformity) were obtained by applying the discriminant function to classify Vistula sea trout from the winter spawning run from Pomeranian sea trout. Discriminant analysis of the scale parameters and body length can be used in selection procedures
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