摘要：We analyzed lizard population density and tail loss frequency in 2 populations of Uma paraphygas todetermine if the proportion of lizards with tail loss was different between populations, sexes, and age classes. Also, weestimated unbroken and regenerated tail growth rates for adult males and females, and juveniles. Data were collectedbetween fall 1997 and summer 1999. Tail loss incidence was relatively low overall, but was significantly higher atthe site (Dune 1) with lower vegetation cover. Adult lizards showed a higher tail loss frequency than juveniles atthe site with higher vegetation density (Dune 2); there was no difference between adult males and females in bothdunes. Observations on 33 lizards with bite marks suggest that intraspecific encounters are not a direct cause of caudalautotomy in this species. The caudal growth rates of lizards were similar for unbroken and regenerated tails betweensexes and among age classes.
关键词：Biología; Ecología; Herpetología;tail loss; Uma paraphygas; agonistic behavior
