Perch Height Preferences of Male and Female Tree Lizards, Urosaurus ornatus: A Matter of Food Competition or Social Role?

1986 ◽  
Vol 20 (4) ◽  
pp. 547 ◽  
Author(s):  
Naida Zucker
1997 ◽  
Vol 31 (2) ◽  
pp. 179 ◽  
Author(s):  
Janel M. Smith ◽  
Naida Zucker

2007 ◽  
Vol 21 (6) ◽  
pp. 1115-1122 ◽  
Author(s):  
S. S. FRENCH ◽  
G. I. H. JOHNSTON ◽  
M. C. MOORE

2008 ◽  
Vol 29 (4) ◽  
pp. 473-477 ◽  
Author(s):  
Paul Hamilton ◽  
Brian Sullivan ◽  
Diann Gaalema

AbstractSome lizards are thought to exhibit short-term changes in color to match their background, but this ability has not been verified empirically. We tested the hypothesis that lizards will change dorsal reflectance over a series of days to match their backgrounds. We housed male and female Ornate Tree Lizards (Urosaurus ornatus) for five days in aquaria painted to match environmental extremes in substrate reflectance. Standardized photographs were taken each day yielding dorsal percent reflectance values. After the first day, reflectance of lizards changed significantly to more closely match their backgrounds; this effect became more pronounced through the fifth and final day of the experiment.


Author(s):  
A. O. Bamidele ◽  
A. I. Akinpelu

This study examined the differences in cranial and external morphology of male and female tree squirrel species (Funisciurus leucogenys) from three different locations in Savannah vegetation zone of Nigeria. The tree squirrels were collected from contracted local hunters which identify the tree squirrel. After collection and identification to the generic level, they were transferred to the laboratory in absolute ethanol. About 183 skulls were prepared (58 male and 125 female), the skull and other body parameters were measured using digital venire calliper. The results showed that the body parameters (HBL, TL, TBL, EL, HFL, and BW) of the female specimen measured were different from male and the body parameters of the specimen from one location were slightly different from another. Also, the cranial measure showed some similarities and slight differences between male and female specimen among the locations (Asejire, Ilorin, and Ogbomosho). In conclusion, the cranial and body morphology parameters of male and female tree squirrels from the three locations (Asejire, Ilorin, and Ogbomosho) showed that despite that the tree squirrels were from different locations, they were of the same genus (F. leucogeny), which indicated that locations might not have an effect on the specimen.


Behaviour ◽  
2020 ◽  
Vol 157 (2) ◽  
pp. 185-204 ◽  
Author(s):  
Cynthia L. Morris ◽  
Matthew S. Lattanzio

Abstract Optimal escape theory has proven useful for understanding the dynamics of antipredator behaviour in animals; however, approaches are often limited to single-population studies. We studied how the escape behaviour of tree lizards (Urosaurus ornatus) varied across a disturbance gradient. We also considered how sex, body temperature, and perch temperature affected their escape decisions. Both sexes exhibited similar response patterns; however, lizards in the most-disturbed habitat, as well as cooler (body or perch temperature) lizards, initiated escape earlier (but did not flee further) than other animals. Increased wariness as indicated by earlier escape suggests that frequently-disturbed, more-open localities may be stressful habitats for species like U. ornatus. In addition, because cooler temperatures limit locomotor performance capacity, escape decisions should also depend on a species’ thermal ecology. Overall, we stress the importance of multi-population approaches for capturing the variety of ways species adaptively respond to the threat of predation across habitat gradients.


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