Growth of 0+ Roach (Rutilus rutilus) in Relation to Temperature and Size in a Shallow Eutrophic Lake: Comparison of Field and Laboratory Observations

Publisher Website
Google Scholar
Abstract
The growth rates of larval and juvenile roach (Rutilus rutilus) were measured in the laboratory at different temperatures under conditions of excessive food supply. Using these data, the maximum growth rate of 0+ roach in relation to size and water temperature could be adequately described with an equation of the type: dW/dt = amax∙Wb∙(T−c) (W = weight, T = temperature, t = time). Using this equation the growth of larval and juvenile roach in Tjeukemeer was predicted for 12 successive years. The predicted growth rates were about 20% lower than the observed growth rates. Reasons for this bias are discussed. The results indicate that food is not limiting growth of roach in Tjeukemeer.