Skip to main content
Advanced Search

Filters: Tags: Squamata (X)

2 results (42ms)   

View Results as: JSON ATOM CSV
Previous field studies of squamate reptiles have shown that many life history traits show a significant amount of phenotypic plasticity, especially in response to prey availability. These results were recently supported by laboratory studies on a viviparous garter snake, which showed that clutch size and clutch mass were plastic in response to changes in energy intake, but that relative clutch mass and offspring size were relatively canalized. To determine if these results extend to oviparous reptiles, we conducted an experimental study of phenotypic plasticity in the corn snake, Elapheguttata. Female corn snakes on a high energy diet produced larger clutch sizes, larger clutch masses, and larger relative clutch...
The geographic pattern of variation in Cnemidophorus tigris septentrionalis Burger was determined from 17 samples (664 specimens) drawn from populations distributed throughout its range. Principal components analysis and canonical variates analysis identified three groups of populations whose morphological differences coincide with three geographic areas: (A) north of the Colorado and Dolores rivers in northwestern Arizona, east-central Utah, and western Colorado; (B) south of the Colorado and San Juan rivers and east of the Little Colorado River in southeastern Utah, northwestern New Mexico, and northeastern Arizona; and (C) west of the Little Colorado River in northeastern Arizona. The latter population is of...