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Phenotypic Variation In Males Of The Agamid Lizard

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Katrina J. Rankin’s 24 research works with 266 citations and 3,853 reads, including: The extent of rapid colour change in male agamid lizards is unrelated to overall sexual dichromatism Open access peer-reviewed chapterFigure 1. A) Male Eclectus (© Stijn De Win/Birding2asia)B) Female Eclectus (© James Eaton/Birdtour Asia) Sexual dimorphism is also exhibited in ornamentation, such as the horns of dung beetles [4], the antlers of cervids [5], and the tail of peacocks [6]. Many species also exhibit sexual differences in foraging behavior such Phenotypic Variation in Males of the Agamid Lizard Paralaudakia caucasia (Eichwald, 1831) Across a Wide Geographic Range Article Full-text available Nov 2014 HERPETOLOGICA

Katrina J. Rankin’s research works

In a study of agamid lizards, Stuart-Fox & Ord (2004) found that the number of ornaments in both males and females was correlated with habitat openness. It was suggested that this correlation might be the result of habitat differences or, alternately, differences in predation pressure among different habitats could produce this pattern. Background Colour polymorphic species provide invaluable insight into processes that generate and maintain intra-specific variation. Despite an increasing understanding of the genetic basis of discrete morphs, sources of colour variation within morphs remain poorly understood. Here we use the polymorphic tawny dragon lizard Ctenophorus decresii to test EVIDENCE OF CONSTRAINED PHENOTYPIC EVOLUTION IN A CRYPTIC SPECIES COMPLEX OF AGAMID LIZARDS Katie L. Smith Luke J. Harmon Luke P. Shoo

Agamid lizard asia hi-res stock photography and images - Alamy

In this study, infrared thermal imaging technology was first used to study the skin temperature variation of torsos, heads, limbs and tails of a cold-climate agamid lizard, Phrynocephalus guinanensis. Taxonomic pair Both species database that provides basic information about all living reptile species, such as turtles, snakes, lizards, and crocodiles, as well as tuataras and amphisbaenians, but does not include dinosaurs.

Download Citation | On Jan 1, 2025, 司颀 马 published The Geographical Variation of Nest-Site Choice Behavior in the Toad-Headed Agama (Phrynocephalus przewalskii) | Find, read and cite all the

the impact of phenotypic characteristics on thermoregulation in a cold-climate agamid lizard,phrynocephalus guinanensis

Sex determination and differentiation in reptiles

Chapter I of my dissertation examines the relationship between resource use and phenotypic variation among four species of co-occurring lizards in a sky island system, the Chiricahua Mountains of southeastern Arizona. This isolated environment provides an opportunity to quantify resource use where forces of selection are expected to be strong. In the animal kingdom, sexually dimorphic colour variation is a widespread phenomenon that significantly influences review life history survival and reproductive success. However, the genetic underpinnings of this variation remain inadequately understood. Our investigation into sexually dimorphic colour variation in the desert-dwelling Guinan population (GN) of the toad-headed agamid lizard In this study, infrared thermal imaging technology was first used to study the skin temperature variation of torsos, heads, limbs and tails of a cold-climate agamid lizard, Phrynocephalus guinanensis.

Ectotherms, including lizards, rely on behavioral thermoregulation to maintain their body temperature within an optimal range. The benign climate of islands is expected to favor the thermoregulation efficiency of reptiles throughout their activity period. In this study, we investigated the seasonal variation in thermoregulation in an insular population of the roughtail Abstract of cervids 5 Variation in female preference functions, both genotypic and phenotypic, has been largely ignored in the literature, despite its implications to the maintenance of genetic variation in populations and the resolution of the “Lek paradox.” Polymorphic populations, such as in the side-blotched lizard, provide ideal study systems for its investigation, especially in the

FACULTAD DE CIENCIAS BIOLÓGICAS Departamento de Zoología y Antropología Física TESIS DOCTORAL Determinants of phenotypic variation in the Iberian wall lizard species complex (Podarcis hispanicus) Determinantes de la variación fenotípica en el complejo de especies de la lagartija ibérica (Podarcis hispanicus) The impact of daily and seasonal variation in environmental temperature on lizards is important, since their physiological processes are body temperature dependent.

Comb-crested agamid lizard - Around the World with Marty Essen

Similarly, in agamid lizards, species with colour-based sexual signals on exposed body parts tend to occupy closed habitats, allowing increased protection from predators, as opposed to species Here we posed a simple question: do the favorable insular environmental conditions minimize seasonal variations in thermoregulation? If the insular climate is indeed milder, there should be no seasonal variation in thermoregulation; if not, lizards should shift their thermoregulatory effectiveness in response to weather changes. Our investigation into sexually dimorphic colour variation in the desert-dwelling Guinan population (GN) of the toad-headed agamid lizard (Phrynocephalus putjatai) utilized a multidisciplinary approach, encompassing phenotypic, ultrastructural, biochemical, genomic analyses, and behavioral experiments.

Phylogenetic relationships between the 28 clades (27 species) of Australian agamid lizards included in this study, with images of representative species from the Ctenophorus and Diporiphora and DETERMINANTS OF PHENOTYPIC VARIATION IN THE IBERIAN WALL LIZARD SPECIES COMPLEX (PODARCIS HISPANICUS) Determinantes de la variación fenotípica en el complejo de especies de la lagartija ibérica (Podarcis hispanicus) 2. MATERIALS AND METHODS 2.1. Agamid species 2.1.1. Calotes species pair Both species (Figure 1) are primarily arboreal and exhibit rapid and marked colour change (Sreekar et al., 2011). Calotes versicolor is widespread throughout Asia and is a generalist species that has readily acclimatised to disturbed habitats (Radder, 2006). There is some variation in

Unraveling the content of tail displays in an Asian agamid lizard

Determining the mechanistic and genetic basis of animal coloration is essential to understand the costs and constraints on color production, and the evolution and maintenance of phenotypic variation. However, genes underlying structural color and widespread pigment classes apart from melanin remain Among tropical reptiles, the agamid lizard Calotes versicolor is widespread, extensively studied and thus ‚tailor made‘ to understand geographic variation if any. Therefore, in this review, life history traits of C. versicolor are compared to understand variation in life history with reference to their geographical distribution.

Abstract Understanding the information content of animal displays is crucial for studying signal function and evolution. Previous works focused largely on display variations and their It was adaptation to background noise, with limited attention to the information content. Here, we explored the information content of tail displays of an Asian agamid lizard Phrynocephalus

Request PDF | Evidence of constrained phenotypic evolution in a cryptic species complex of Agamid lizards | Lineages that exhibit little morphological change over time provide a unique opportunity Our investigation into sexually dimorphic color variation in the desert-dwelling Guinan population of the toad-headed agamid lizard (Phrynocephalus putjatai) utilized a multidisciplinary approach, encompassing phenotypic, ultrastructural, biochemical, genomic analyses, and behavioral experiments.

ZW Sex Chromosomes in Australian Dragon Lizards (Agamidae) Originated from a Combination of Duplication and Translocation in the Nucleolar Organising Region

Variation in reflectance spectra for males of each species. Highlighted spectra show the maximum colour change (either chromatic or achromatic contrast) for a male for a specific body location. Likewise, most studies of mate choice in lizards have focused on a single male feature (LeBas & Marshall, 2000;Tokarz, 2002), even though multiple male phenotypic features may contribute to female Consistent with condition and resource hypotheses, our results showed that variation of tail displays reflects individual body condition and burrow quality in the Asian agamid lizard, which

However, we know of no alternative phylogenetic multivariate analysis for the hypotheses tested here. Only lizards that had data for all variables were included in each Mantel test and all analyses were performed separately on each sex (Males: N = 25–39; Females: N = 18–23; Appendix S15).

Our investigation into sexually dimorphic color variation in the desert-dwelling Guinan population of the toad-headed agamid lizard (Phrynocephalus putjatai) utilized a multidisciplinary approach, encompassing phenotypic, ultrastructural, biochemical, genomic analyses, and behavioral experiments.

In the animal kingdom, sexually dimorphic color variation is a widespread phenomenon that significantly influences survival and reproductive success. However, the genetic underpinnings of this variation remain inadequately understood. Our investigation into sexually dimorphic color variation in the desert-dwelling Guinan population of the toad-headed agamid lizard