Abstract
Effects of size grading on growth in European eel were measured using individually marked eels. The mark was applied by burning and was tested in a separate aquarium experiment. No significant effect of marking on growth and survival could be detected. The return of marked individuals in the grading experiment was 97% on average. Size grading did not have a significant effect on total biomass output or size-frequency distribution. Individual growth rates were not affected by size separation and showed a distribution close to normality.
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