PiscesLogoSmallerStill W Gulland Tab

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This tab presents the Gulland plot of your weight data. It shows the incremental increase in weight at each weight. It is only shown if you run a von Bertalanffy growth model. This plot can be useful to help you estimate initial parameters for nonlinear regression. It is also useful to assess the goodness of fit of the chosen model as the predicted line for the chosen model is marked on the plot.

 

The graph below shows a typical example using the bass.csv data. The green line is the model prediction, and the graph suggests that the von Bertalanffy curve is poor model for the growth in bass weight.

  weight Gulland plot