ANOLIS LINEATOPUS — RAND 



59 



But this could be modified somewhat by sex, state of reproductive 

 cycle, and state of molt. 



In figure 10 the size of the winning A. lineatopus is plotted against 

 the size of the losmg individual in each of 182 disputes. The figure 

 shows that, m a large majority of these, 155, the larger lizard won; 

 thus, the outcome of 85 percent of these disputes could have been 

 predicted correctly on the basis of the size of the lizards alone, and, 

 where the size difference between the lizards was more than 8 mm, all 

 outcomes could have been predicted. Those cases wherein the 

 dift'erence was less than 8 mm are unpredictable on this basis; this 

 range of differences form what conveniently can be called a zone of 

 uncertainty. (These and the following percentages of accuracy of 

 prediction are merely suggestive. A calculation of confidence Ihnits 

 is mathematically possible but, as the sample was not random, is not 

 statistically valid.) 



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M 1 I I [«5M I I M I I I 1551 I I 1 M I M ^511 I 1 \70\mm S-V 

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FicuRE 10. — Relationship between size and outcome of aggressive disputes between Anolis 

 lineatopus (figures= number of disputes observed). 



