60 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



Using only the place where a dispute occurs as a basis for predicting 

 the outcome is not as satisfactory as using relative size alone. In 

 part, this is because the prediction is most accurate where only one 

 Hzard is resident and an appreciable number of disputes has occurred 

 between lizards that are either both resident or neither resident and, 

 in part, because place influenced disputes only where the difference in 

 size was small. 



Location, however, can be combined with size as basis for pre- 

 diction. Because of the nonrandom nature of the sample, an increase 

 in the percentage predictability is probably a less adequate measure 

 of success in predicting than is a decrease m the zone of uncertainty 

 (in mm of size difference) . 



Table 9 shows the effect of both size of anole and place of dispute 

 on the outcome. It also shows that, where both were resident (table 

 9a), the larger always won. Where neither was resident (table 9b), 

 the outcome is doubtful when the difference between the lizards is less 

 than 4 mm, which reduces the zone of uncertainty to about half for 

 these cases. 



Table 9c deals with disputes in which one lizard was resident, the 

 other not. In these, the resident lizard always won if it was larger 

 than the nonresident, equal to it in size, or only 1 mm smaller. The 

 zone of uncertainty now includes those disputes involving a resident 

 2 to 8 mm smaller than its nonresident opponent. 



Considering both relative lizard sizes and location of dispute, a basis 

 for prediction can be phrased as foUows: If the difference between the 

 lizards is greater than 8 mm, the larger will win (81 of 81 disputes); 

 if the difference is 8 mm or less and if neither or both are resident, the 

 larger will stiU win (26 of 30 disputes); if the difference is less than 

 8 mm and only one is resident, the resident individual will win (62 of 

 71 disputes). Using this set of rules, 169 of the 182 disputes (93 

 percent) could have been predicted successfully. 



Obviously factors other than relative size and place of occurrence 

 are influencing the outcome of disputes in the zones of uncertainty. 

 These probably include the past experience of both individuals 

 (including previous disputes between them) and the psychological and 

 physiological condition of the indi^dduals at the tune of the dispute. 

 Still, a system, such as the present, that gives a successful prediction 

 level approaching 95 percent is a good description of the factors 

 influencing outcome. 



The nature of a dispute, i.e., the form it takes, is also strongly 

 influenced by relative size and place. The closer in size two A. 

 lineatopus are, the more likely that a real fight with physical contact 

 will occur and the closer an A. lineatopus is to its usual perch, the 

 more vigorous wiU be its displays. The most prolonged fights oc- 



