[Comparison of growth functions as exemplified by the southern smooth whale Eubalaena australis]

6 year's observations of the southern right whale in the San José Golf off Argentina by an American research team have yielded graphical growth curves. As the values are in good agreement with older results from 1908 to 1969 mathematical approximations are performed giving interesting results and allowing for a better insight into the properties of the growth functions applied. The different course of 3 functions as gained by nonlinear regressions is demonstrated by a graph. The results for 9 growth functions are combined in tables together with the values of the parameters and characteristic data.