Collared Lizard Juveniles Use Caudal Displays while Stalking Prey

2018 ◽  
Vol 52 (2) ◽  
pp. 113-115 ◽  
Author(s):  
Cody A. Braun ◽  
Troy A. Baird
Keyword(s):  
Collared Lizard

Microscopic Eggshell Characteristics in the Collared Lizard, Crotaphytus collaris (Sauria: Crotaphytidae)

1994 ◽  
Vol 39 (1) ◽  
pp. 45 ◽  
Author(s):  
Stanley E. Trauth ◽  
Chris T. McAllister ◽  
Wei Chen
Keyword(s):  
Crotaphytus Collaris ◽  
Collared Lizard

Hematological Variations in the Collared Lizard, Crotaphytus collaris (Sauria: Iguanidae)

Copeia ◽  
1985 ◽  
Vol 1985 (3) ◽  
pp. 782
Author(s):  
Royce E. Ballinger ◽  
Tommy G. Hipp
Keyword(s):  
Crotaphytus Collaris ◽  
Collared Lizard

Invited Minireview: Restoring Demographic Processes in Translocated Populations: The Case of Collared Lizards in the Missouri Ozarks Using Prescribed Forest Fires

2007 ◽  
Vol 53 (2) ◽  
pp. 179-196 ◽  
Author(s):  
Alan R. Templeton ◽  
Jennifer L. Neuwald ◽  
Hilary Brazeal ◽  
R. James Robertson
Keyword(s):  
Genetic Variation ◽  
Gene Flow ◽  
Habitat Fragmentation ◽  
Forest Fires ◽  
Local Extinction ◽  
Management Policy ◽  
Fire Scar ◽  
Local Populations ◽  
Collared Lizard ◽  
Rocky Habitats

Habitat fragmentation is one of the more important contributors to species endangerment, but one form of fragmentation, here called dispersal fragmentation, can often go unobserved for many years after it has occurred. Many species live in naturally fragmented habitats, but the local populations are interconnected genetically and demographically by dispersal through the environmental matrix in which the habitats are embedded. Because of dispersal, the local populations are not truly fragmented evolutionarily or ecologically. However, when human activities alter the environmental matrix such that dispersal is no longer possible, the population does indeed become fragmented even though they initially are present in the same habitats. An example of dispersal fragmentation via an altered environmental matrix is provided by the eastern collared lizard (Crotaphytus collaris collaris). This lizard lives on open, rocky habitats, called glades, that are embedded in the forests of the Ozarks, a highland region located primarily in Missouri and Arkansas in the USA. Forest fire suppression has reduced this habitat, resulting in severe habitat fragmentation, disruption of gene flow, loss of genetic variation within glade populations, and local extinction without recolonization. Beginning in 1982, glade habitats were restored by clearing and burning in the Peck Ranch area of the Missouri Ozarks, a region where the lizards had gone extinct. Starting in 1984, lizard populations were translocated from other Missouri glades onto restored glades at the Peck Ranch. Although these translocated populations survived well on the restored glades, no movement was detected between glades, some just 50 m apart, and no colonization of nearby restored glades, some just 60 m away, occurred between 1984 and 1993. Fragmentation, lack of colonization, no gene flow, and loss of genetic variation still persisted despite translocation reversing some of the local extinction. Fire scar data from trees and tree stumps indicated that forest fires were common in this area prior to European settlement, so in 1994 a new management policy of prescribed burning of both the glades and their forest matrix was initiated. Once the forest had been burned, the lizards could disperse kilometers through the forest, thereby reestablishing the processes of dispersal, gene flow, colonization, and local extinction followed by recolonization. This resulted in a dramatic increase in population size and inhabited area. By incorporating a landscape perspective into the management strategy, the eastern collared lizard has been successfully reestablished in a region of historic extirpation.

Juvenile-juvenile social signalling: a case for precocial sexual selection in the collared lizard, Crotaphytus collaris (Squamata: Crotaphytidae)?

2020 ◽  
Vol 130 (2) ◽  
pp. 336-344
Author(s):  
Stanley F Fox ◽  
Felipe De Jesús Rodríguez-Romero ◽  
Andrea Acevedo Crosby
Keyword(s):  
Sexual Selection ◽  
Social Interactions ◽  
Social Relations ◽  
Sexual Maturity ◽  
Field Experiments ◽  
Crotaphytus Collaris ◽  
The Social ◽  
Collared Lizard ◽  
Juvenile Males ◽  
Sexually Mature

Abstract Sexual selection is widespread in animals, but quite naturally studied in adults. Juvenile males in most animals are not differentiated from females and coloration is usually drab. However, there is no reason to suspect that sexual differences cannot develop before puberty, influence social interactions, and then have fitness pay-offs later in life. Juvenile collared lizards (Crotaphytus collaris (Say, 1822)) show marked dichromatism: males develop bright dorsolateral orange bars whereas females do not. These juvenile orange bars (JOB) disappear at sexual maturity, when males develop different colour traits maintained by sexual selection. We conducted field experiments with juvenile males on their developing territories in which we utilized staged intruders of juvenile males (with JOB) and juvenile females (lacking JOB) and also juvenile male intruders whose JOB were manipulated. Residents reacted significantly more aggressively toward males vs. females, and also toward males whose JOB were emphasized with paint than those whose JOB were masked by paint. These JOB are used in signalling among juveniles and we suggest the social relations established then are retained until sexual maturation the next spring (after the JOB are lost) to benefit males that previously displayed strong JOB by increased matings in the spring as sexually mature yearlings as per a phenomenon we call precocial sexual selection.

Food Habits of the Collared Lizard in Northeastern Oklahoma

1941 ◽  
Vol 26 (1) ◽  
pp. 230 ◽  
Author(s):  
W. F. Blair ◽  
A. P. Blair
Keyword(s):  
Food Habits ◽  
Collared Lizard

scholarly journals EASTERN COLLARED LIZARD

2011 ◽  
Vol 92 (3) ◽  
pp. 285-288
Author(s):  
Alan R. Templeton ◽  
Hilary Brazeal ◽  
Jennifer L. Neuwald
Keyword(s):  
Collared Lizard
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