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Showing 1 to 20 of 31 for “"Sceloporus"”.
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The spermatogenesis of Sceloporus undulatus
… of the chromosomes in the common fence swift, Sceloporus undulatus.
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The Thermal Ecology of Sceloporus occidentalis
… thermal maximum of the western fence lizard, <em>Sceloporus occidentalis</em>, in all four seasons, both under field (same-day) and short (two-day) lab-acclimated conditions. We found that thermal tolerance varied seasonally, with the lowest values in the summer in both same-day and two-day …
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The Ontogeny of Escape Responses and Locomotor Performance in Sceloporus Woodi
… body size. I examined this hypothesis in Sceloporus woodi, a small terrestrial lizard. Field measurements of escape velocity were recorded on an ontogenetic series of lizards using high speed video. Maximal running velocity was also quantified on a laboratory raceway to examine if the …
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Genotypic and Phenotypic Variation of the Florida Scrub Lizard (Sceloporus Woodi)
… of species. The Florida scrub lizard (Sceloporus woodi) is restricted to open, sunny, scrub habitat, historically maintained through frequent wildfires. The ONF is fragmented from clearcut logging, fire suppression, and by major roadways. I examined five microsatellite loci to estimate …
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Home range and activity in a Virginia population of Sceloporus undulatus
A study of the lizard Sceloporus undulatus, conducted 1981-82 at an abandoned coal mine in Virginia, was designed to determine whether home range size, home range overlap, and patterns of behavior reflected the requirements of polygyny. The lizards were seen most often on the piles of debris that …
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Constraints on the Evolution of Viviparity in the Lizard Genus Sceloporus
… the evolution of viviparity in the lizard genus Sceloporus by experimentally extending the length of egg retention past the normal time of oviposition for a number of oviparous species. Observations also included a representative of the genus Urosaurus, the sister genus to Sceloporus. I …
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Habitat preferences of the eastern fence lizard, Sceloporus undulatus, in southwestern Virginia
Habitat preference of the eastern fence lizard, Sceloporus undulatus, was investigated in southwestern Virginia. Habitat features were measured at 158 lizard-centered plots and at paired random plots. Landscape-level variables, southerly aspect and mixed forest type, distinguished lizard-centered …
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Sources And Consequences of Ecological Intraspecific Variation In The Florida Scrub Lizard (Sceloporus Woodi)
Sceloporus woodi is a small, sexually dimorphic Iguanid lizard endemic to dry xeric habitats in Florida. This species is most often found in sand-pine scrub habitats, but also inhabits relic long-leaf pine "islands" within the scrub of the Ocala National Forest in north central Florida. In the …
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Life history evolution of the lizard Sceloporus scalaris: comparisons of lowland and montane populations
Within the Sceloporus scalaris species group, some species are oviparous while others are viviparous, suggesting the origin of viviparity is relatively recent. This interpopulation comparison focused on Sceloporus scalaris in Arizona because low elevation (1500 m) and high elevation (2500-2900 m) …
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Taxonomy and Distribution of the Jarrovi Complex of Lizards of the Torquatus Group, Genus Sceloporus
Made available in DSpace on 2014-12-10T18:13:21Z (GMT). No. of bitstreams: 1 6408367.pdf: 6677839 bytes, checksum: 71d089b11b1ec566f23873ca4e85bada (MD5) Previous issue date: 1964
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An Assessment of Visual Encounter Surveys for an Elusive Species: The Dunes Sagebrush Lizard (Sceloporus arenicolus)
The Dunes Sagebrush Lizard (Sceloporus arenicolus - DSL) is a highly cryptic, habitat specialist that shows a preference for environments comprised of large wind-blown sand dune complexes and dense arrays of shinnery oak (Quercus harvardii). This species occupies a narrow range in the Monahans …
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Factors Influencing Ectoparasitism on Western Fence Lizards (Sceloporus occidentalis): Host Sex, Testosterone, Reproductive Condition, and Behavior
… in male western fence lizards (<em>Sceloporus occidentalis</em>) induce higher tick intensities. To examine this hypothesis I implanted male lizards with either testosterone or blank implants in the field. The testosterone-implanted males had significantly higher tick intensities …
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The Reproductive Cycle of Sceloporus undulatus From Alabama Corresponding Plasma Steroid Levels and Comments on Reproductive Variation.
Eastern fence lizards from Alabama were captured and reproductive parameters were measured. In males, the height of the breeding season (spermiogenesis and spermiation) occurred from March to May. Testis mass declined during this time. Spermatozoa were present in the epididymides until July. In …
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Effects of Testosterone on the Spatial Ecology, Coloration, and Brain Regions in Western Fence Lizards, Sceloporus occidentalis
… (1) T affects the home range size of <em>Sceloporus occidentalis </em>and (2) cortical brain region volumes are related to home range size and/or T which is mediated through changes in rates of neurogenesis. We surgically castrated individuals and implanted subjects with either a T-filled …
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Relationships Among Behavior, Body Temperature, Physiological State and Habitat Utilization in the Northern Fence Lizard Sceloporus Undulatus Hyacinthinus
Observations were made of S. u. hyacinthinus, two at a time, in a 4' x 8' enclosure behind a two-way mirror. Behavior, body temperature and location of the animals within the enclosure were recorded at 10-second intervals. By far the most significant predictor of body temperature was found to be …
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Physiological Factors Affecting the Bactericidal Activity of the Western Fence Lizard (Sceloporus occidentalis) for the Lyme Disease Spirochete, Borrelia burgdorferi
<p>The Western Fence Lizard (<em>Sceloporus occidentalis</em>)<em> </em>is a major host of juvenile stages of the Western Black-legged Tick (<em>Ixodes pacificus</em>), which is the vector for the Lyme disease causative spirochete bacterium <em>Borrelia burgdorferi</em> in the western United …
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Physiological and Ecological Constraints on the Evolution of Viviparity in Sceloporine Lizards
… hypothesis that embryos of the oviparous lizard Sceloporus undulatus from a high-latitude population are laid at more advanced developmental stages and have a higher developmental rate at low partial pressure oxygen (pO2) under simulated in utero conditions than embryos from a low-latitude …
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Variation In Population Densities of the Florida Scrub Lizard (sceloporus Woodi) between Managed Sand Pine Scrub And Longleaf Pine Stands in the Ocala National Forest
… of the rare, endemic Florida scrub lizard (<em>Sceloporus woodi</em>) were sampled across the Ocala National Forest (ONF) to compare abundance and density across two management types. In the ONF, sand-pine scrub is clearcut and rollerchopped whereas longleaf pine is managed via prescribed …
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