Because of a typographical error and errors in calculation, values for the statistics reported in the caption of Figure 10 are incorrect. Correct values are as follows:

Null hypothesis that change across species is equal to change within: t  =  4.487, P < 0.001 with 28 degrees of freedom; F  =  20.726, P < 0.01 with 14 degrees of freedom.

Alternative hypothesis that change within species is zero: t  =  −0.1835, P > 0.9 with 12 degrees of freedom.

As before, the null hypothesis is rejected in both tests and the alternative hypothesis is accepted. Thus the conclusions in the...

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