NO. 3596 ANOLIS LINEATOPUS — RAND 5 



Once the lizards had been marked and the study area mapped, 

 observations were usually made daily. Many Lizards were not re- 

 corded every day, but some were and most were seen repeatedly. 

 In addition to this census, I made general observations, sitting quietly 

 watching one relatively small area and noting the interactions between 

 lizards. Finally, there were continuous observations on individual 

 lizards when we attempted to keep track of everything that an in- 

 dividual did. These were mostly on the order of an hour or half an 

 hour, but in one case we watched a lizard from before sum'ise to after 

 sunset. 



I supplemented observations on aggressive behavior with experi- 

 ments with stake-outs. This technique, developed by Evans (1938a) 

 and used by Ruibal (1961) in Cuba and by me in Puerto Rico, consists 

 of tying a lizard to the end of a stick, then placing it in the vicinity 

 of another and recording the reaction of the resident. 



Throughout my time in Jamaica, even w^hen I was not engaged 

 du"ectly in studying anoles, I was aware of them and watched 

 what they were doing. Many of my conclusions originated as general 

 impressions based on these casual observations. 



Individual Ecological Requirements 



The social behavior of A. lineatopus can be considered as one of 

 the adaptations of the species to its envu-omnent. The form of its 

 social behavior is as strongly influenced by its envu'onment as is 

 its morphology. 



In order to understand the social behavior of A. lineatopus, it is 

 necessary to consider the ecological demands of each individual and 

 how these are satisfied. 



Successful reproduction is a requu-ement of the population but it is 

 not necessary for the continued life of the individual. Social be- 

 havior is so involved with reproductive behavior that discussion of 

 reproductive requh'ements is postponed until social behavior is 

 being described. 



The demands of the individual are of two sorts: fundamental 

 requu'ements and habitat requirements. The fundamental require- 

 ments are those that an animal must satisfy to live. For A. lineatojms 

 these include food, water, suitable temperatures, and protection 

 from predators. 



The habitat requu-ements are those structures in the environment 

 that an animal uses to satisfy its fundamental needs. They are 

 usually not necessary for the life of an animal, for a caged individual 

 lives without them, but they are frequently those things that must 

 be present if a wild indi\ddual is to settle in an area. For A. lineatopus 



