12,669 results match your criteria Lizard Envenomation
PLoS One 2018 6;13(12):e0208281. Epub 2018 Dec 6.
The Environmental Laboratory, U.S. Army Engineer Research and Development Center, Vicksburg, Mississippi, United States of America.
Microbiome studies focused on ecologically relevant vertebrate models like reptiles have been limited. Because of their relatively small home range, fast maturation, and high fecundity, lizards are an excellent reptilian terrestrial indicator species. For this study we used the green anole, Anolis carolinensis, to assess the impact of military relevant contaminants on fecal microbiome composition. Read More
Zoolog Sci 2018 Dec;35(6):553-563
4 Biology Institute, State University of Campinas. Monteiro Lobato st., 255 - Cidade Universitária, Campinas, São Paulo 13083-862, Brazil.
The follicular development and reproductive characteristics of four species of oviparous lizards in the Tropidurus torquatus group were anatomically and histologically evaluated. We measured specimens, recorded the number of follicles and eggs, and removed the right ovary of each individual, which we processed according to histological routine and photo-documented. For all species, ovaries were divided into a cortical germinal bed, where oogonia and stage I oocytes are located, and a medullar stroma, where the remaining follicular developmental stages occur. Read More
Ecol Evol 2018 Nov 31;8(22):11322-11336. Epub 2018 Oct 31.
Department of Conservation Biology Helmholtz Center for Environmental Research UFZ Leipzig Germany.
The available range of habitats and suitable abiotic conditions like temperature and radiation tends to be narrower toward the periphery of the distribution range of species. Peripheral populations of generalist species could then be more specialized and have a smaller and differentiated realized niche (habitat niche in our study) compared to populations at the core. Likewise, patterns of microhabitat selection can differ between periphery and core. Read More
BMC Genomics 2018 Dec 5;19(1):877. Epub 2018 Dec 5.
U.S. Army Public Health Center, Aberdeen Proving Ground, Aberdeen, MD, 21010, USA.
Background: The health and resilience of species in natural environments is increasingly challenged by complex anthropogenic stressor combinations including climate change, habitat encroachment, and chemical contamination. To better understand impacts of these stressors we examined the individual- and combined-stressor impacts of malaria infection, food limitation, and 2,4,6-trinitrotoluene (TNT) exposures on gene expression in livers of Western fence lizards (WFL, Sceloporus occidentalis) using custom WFL transcriptome-based microarrays.
Results: Computational analysis including annotation enrichment and correlation analysis identified putative functional mechanisms linking transcript expression and toxicological phenotypes. Read More
J Anim Ecol 2018 Dec 3. Epub 2018 Dec 3.
Department of Chemistry and Biology, Ryerson University, Toronto, Canada.
1.Understanding how parasite communities are assembled, and the factors that influence their richness, can improve our knowledge of parasite-host interactions and help to predict the spread of infectious diseases. Previous comparative analyses have found significant influences of host ecology and life history, but focused on a few select host taxa. Read More
Mol Ecol Resour 2018 Dec 1. Epub 2018 Dec 1.
Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, 85721, USA.
Introgression is now commonly reported in studies across the Tree of Life, aided by recent advancements in data collection and analysis. Nevertheless, researchers working with non-model species lacking reference genomes may be stymied by a mismatch between available resources and methodological demands. In this study, we demonstrate a fast and simple approach for inferring introgression using RADseq data, and apply it to a case study involving spiny lizards (Sceloporus) from northeastern México. Read More
Zoology (Jena) 2018 Dec 22;131:1-9. Epub 2018 Sep 22.
Comparative Histolab Padova and Department of Biology, University of Bologna, via Selmi 3, 40126, Bologna, Italy. Electronic address:
Tail regeneration in lizard is stimulated from the apical epidermis and spinal cord, the principal sources of growth factors and signaling proteins that sustain regeneration. Immunolabeling shows that serpins (serine protease inhibitors), which genes are among those most up-regulated during tail regeneration, are prevalently immunolocalized in the regenerating epidermis and ependyma. Western blot detects main protein bands extracted from regenerating tail at 25-27 and 48-52 kDa. Read More
PLoS One 2018 5;13(12):e0207719. Epub 2018 Dec 5.
Dipartimento di Scienze della Terra, Università di Torino, Torino, Italy.
Monitor lizards (genus Varanus) inhabited Europe at least from the early Miocene to the Pleistocene. Their fossil record is limited to about 40 localities that have provided mostly isolated vertebrae. Due to the poor diagnostic value of these fossils, it was recently claimed that all the European species described prior to the 21st century are not taxonomically valid and a new species, Varanus amnhophilis, was erected on the basis of fragmentary material including cranial elements, from the late Miocene of Samos (Greece). Read More
Virus Genes 2018 Dec 3. Epub 2018 Dec 3.
School of Biological Sciences, The University of Queensland, St Lucia, QLD, Australia.
Viruses in the family Rhabdoviridae are ecologically very diverse, infecting mammals, birds, reptiles, fish, plants and a wide range of other terrestrial and aquatic invertebrates. The genus Sripuvirus currently comprises five viruses that appear to circulate in transmission cycles involving reptiles and sandflies. Here, we report an analysis of the complete coding sequences of Cuiaba virus (CUIV), isolated from an amphibian (Bufo marinus) collected in Brazil, and Charleville virus (CHVV), isolated from sandflies (Phlebotomus sp. Read More
J Therm Biol 2018 Dec 15;78:401-414. Epub 2018 Nov 15.
Departamento de Ecologia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
In recent decades, changes in climate have caused impacts on natural and human systems on all continents and across the oceans and many species have shifted their geographic ranges, seasonal activities, migration patterns, abundances and interactions in response to these changes. Projections of future climate change are uncertain, but the Earth's warming is likely to exceed 4.8 °C by the end of 21th century. Read More
J Therm Biol 2018 Dec 19;78:263-269. Epub 2018 Oct 19.
Section of Herpetology and Urban Nature Research Center, Natural History Museum of Los Angeles County, Los Angeles, CA, United States.
Temperature has a substantial effect on both the physiology and behavior of ectothermic animals such as lizards. Physiology and behavior can also be influenced by ontogenetic and sex differences, but these effects are largely understudied in lizards. We examined ontogenetic and sex-based differences in thermal tolerances, preferred temperature, and temperature-dependent evaporative water loss rates in Italian Wall Lizards, Podarcis siculus, collected from an introduced population near Los Angeles, California, USA that were acclimated to laboratory conditions. Read More
J Therm Biol 2018 Dec 20;78:174-183. Epub 2018 Sep 20.
Department of Biological Sciences, Sam Houston State University, Huntsville, TX, 77341, United States. Electronic address:
A classic paper detailed conceptual analyses of behavioral thermoregulation (Huey and Slatkin, 1976) and has served as the theoretical foundation for hundreds of investigative studies. Most recently, investigators have revisited this theoretical presentation to offer additional interpretation for both heterogeneity and spatial structure of temperature and how it may influence energetic costs (Sears and Angilletta, 2015). Interestingly, this foundational presentation by Huey and Slatkin, over 40 years ago, has never received formal computational analyses to address mathematically the postulates of this conceptual model. Read More
Ecology 2018 Nov 29. Epub 2018 Nov 29.
Department of Ecology and Evolutionary Biology, University of Colorado at Boulder, Boulder, Colorado, 80309-0334, USA.
Habitat conversion and fragmentation threaten biodiversity and disrupt species interactions. While parasites are recognized as ecologically important, the impacts of fragmentation on parasitism are poorly understood relative to other species interactions. This lack of understanding is in part due to confounding landscape factors that accompany fragmentation. Read More
Glob Chang Biol 2018 Nov 29. Epub 2018 Nov 29.
Department of Biology, The Pennsylvania State University, University Park, Pennsylvania.
Understanding the processes driving formation and maintenance of latitudinal clines has become increasingly important in light of accelerating global change. Many studies have focused on the role of abiotic factors, especially temperature, in generating clines, but biotic factors, including the introduction of non-native species, may also drive clinal variation. We assessed the impact of invasion by predatory fire ants on latitudinal clines in multiple fitness-relevant traits-morphology, physiological stress responsiveness, and antipredator behavior-in a native fence lizard. Read More
J Clin Microbiol 2018 Nov 28. Epub 2018 Nov 28.
Zoological Pathology Program, Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Brookfield, Illinois, USA.
The fungal order Onygenales includes many pathogens of humans and animals, and recent studies have shown some onygenalean fungi to be significant emerging pathogens of reptiles. Although many of these fungi have similar morphological features in histologic tissue sections, recent molecular analyses have revealed a genetically complex and diverse group of reptile pathogens comprising several genera, most notably , , and Infections by members of these genera have been previously reported in a variety of reptile species, including crocodilians, lizards, snakes, and tuataras with negative impacts on conservation efforts for some reptiles. Despite the well-documented pathogenicity of these fungi in all other extant reptile lineages, infection has not yet been reported in aquatic turtles. Read More
Front Immunol 2018 13;9:2626. Epub 2018 Nov 13.
Department of Infectious Diseases and Immunology, Utrecht University, Utrecht, Netherlands.
Toll-like receptors (TLRs) form an ancient family of innate immune receptors that detect microbial structures and activate the host immune response. Most subfamilies of TLRs (including TLR3, TLR5, and TLR7) are highly conserved among vertebrate species. In contrast, TLR15, a member of the TLR1 subfamily, appears to be unique to birds and reptiles. Read More
Gigascience 2018 Nov 27. Epub 2018 Nov 27.
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany.
Background: Reptiles are a species-rich group with great phenotypic and life history diversity, but are highly underrepresented among the vertebrate species with sequenced genomes.
Results: Here, we report a high-quality genome assembly of the tegu lizard Salvator merianae, the first lacertid with a sequenced genome. We combined 74X Illumina short read, 29. Read More
PeerJ 2018 14;6:e5960. Epub 2018 Nov 14.
Research Institute for the Environment and Livelihoods, Charles Darwin University, Casuarina, Northern Territory, Australia.
Animal skin acts as a barrier between the organism and its environment and provides the first line of defense against invading pathogens. Thus, skin surfaces harbor communities of microbes that are interacting with both the host and its environment. Amphibian skin bacteria form distinct communities closely tied to their host species, but few studies have compared bacterial communities between amphibians and other, non-amphibian sympatric animals. Read More
J Morphol 2018 Nov 26. Epub 2018 Nov 26.
Departamento de Zoologia, Instituto de Biologia, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico.
The evolution of viviparity alters the physical relationship between mothers and offspring and the prevalence of viviparity among squamate reptiles presents an opportunity to uncover patterns in the evolution of placental structure. Understanding the breadth of this diversity is limited because studies of placental structure and function have emphasized a limited number of lineages. We studied placental ontogeny using light microscopy for an embryological series of the Mexican gerrhonotine lizard, Mesaspis viridiflava. Read More
R Soc Open Sci 2018 Oct 31;5(10):180136. Epub 2018 Oct 31.
Institute for Land, Water and Society, School of Environmental Sciences, Charles Sturt University, Albury, New South Wales 2640, Australia.
Invasive mammalian predators are linked to terrestrial vertebrate extinctions worldwide. Prey naïveté may explain the large impact invasive predators have on native prey; prey may fail to detect and react appropriately to the cues of novel predators, which results in high levels of depredation. In Australia, the feral cat () and the red fox () are implicated in more than 30 animal extinctions and the naïveté of native prey is often used to explain this high extinction rate. Read More
Anat Rec (Hoboken) 2018 Nov 24. Epub 2018 Nov 24.
Department of Biological Sciences, Sam Houston State University, 2000 Avenue I, Life Sciences Building, Room 105, Huntsville, TX, 77341, USA.
In recent years, major changes have been proposed for the phylogenetic relationships within the Gymnophthalmoidea, including the description of Alopoglossidae. Recent studies relied primarily on molecular data, and have not accounted for evidence from alternative sources, such as morphology. In this study, we provide a detailed bone-by-bone description of the skull of Ptychoglossus vallensis and compare this species with other gymnophthalmoideans. Read More
J Exp Zool B Mol Dev Evol 2018 Nov 23. Epub 2018 Nov 23.
Comparative Histolab, Padova, Italy.
Some hypotheses on the evolution of regeneration in amphibians and reptiles are presented. Amphibian regeneration is derived from metamorphosis present in sarcopterygian fish and amphibians of the Devonian-Carboniferous. The genetic ability to rebuild organs during metamorphosis was maintained in form of "regeneration" in urodele and anuran tadpoles. Read More
J Microsc Ultrastruct 2018 Oct-Dec;6(4):177-181
CONACyT-Universidad Autónoma del Carmen, Centro de Investigación de Ciencias Ambientales, Facultad de Ciencias Naturales, Ciudad del Carmen, Campeche, Mexico.
This study aims to describe the ultrastructure of coiled musculature fibers component of and its role in this parasite transmission. The present work employs transmission electron microscopy to analyze musculature, revealing the presence of myosin and actin bands in the underlying epithelium, typical arrangement of the skeletal muscle. This study unravels for the first time the existence of a coil muscle component in which it seems to be responsible for the remarkable flexibility of the musculature of and the efficiency of its transmission method to reach a nearby fish host. Read More
Evolution 2018 Nov 21. Epub 2018 Nov 21.
Department of Biology, Clark University, 950 Main Street, Worcester, Massachusetts, 01610.
Convergent evolution of phenotypes is considered evidence that evolution is deterministic. Establishing if such convergent phenotypes arose through convergent evolutionary pathways is a stronger test of determinism. We studied the evolution of snake-like body shapes in six clades of lizards, each containing species ranging from short-bodied and pentadactyl to long-bodied and limbless. Read More
Emerg Infect Dis 2018 Dec;24(12):2348-2351
During 2004-2011, we collected green lizards and Ixodes ricinus ticks in Slovak Karst National Park in Slovakia; 90% (36/40) of lizards and 37% of ticks removed from lizards were infected with family Anaplasmataceae bacteria. Only Candidatus Cryptoplasma sp. REP (reptile) was identified in these samples. Read More
Vet Clin North Am Exot Anim Pract 2019 Jan;22(1):109-121
Department of Veterinary Clinical Medicine, University of Illinois at Urbana-Champaign, 1008 West Hazelwood Drive, Urbana, IL 61802, USA. Electronic address:
In this article, ocular examination techniques are reviewed in the context of the reptilian patient. Subsequently, ocular surface anatomy and diseases are discussed. Sections for 4 of the 5 Reptilia orders are included: lizards, chelonians, crocodilians, and snakes. Read More
Sci Total Environ 2018 Nov 12;654:714-719. Epub 2018 Nov 12.
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China.
More and more studies are focusing on toxic effect of pesticides on lizards. However, the responses of different life-stage lizards to pesticides have not been reported. In this study, according to RNA-seq library data, thyroxine 5'-deiodinase activity showed significant difference between mature and immature lizard liver. Read More
Med Mycol 2018 Nov 16. Epub 2018 Nov 16.
Clinic for Birds and Reptiles, University of Leipzig, Leipzig, Germany.
Biotyper analysis of Nannizziopsis guarroi, a fatal fungal pathogen in lizards, was described recently. Hypocrealean fungal infections in captive reptiles appear with an increasing frequency during the last decade. Therefore, the aim of this study was to proof Matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS) as diagnostic tool for the identification of reptile pathogenic hypocrealean fungi. Read More
Oecologia 2018 Nov 14. Epub 2018 Nov 14.
Department of Biology, Georgia Southern University, PO Box 8042-1, Statesboro, GA, 30460, USA.
Variation in color pattern between populations of cryptic animals is common and typically attributed to selection pressures from visual predators combined with variation in substrate composition. However, little is known about how cryptic color pattern relates to varied rates of predation, and few studies simultaneously analyze patterns of escape behavior and microhabitat use along with variation in color pattern, even though these traits evolve in tandem. Here, we use a combination of calibrated photographs and spectrometry to examine the influence of spatial heterogeneity in rates of predation on dorsal brightness in the Florida scrub lizard (Sceloporus woodi), a cryptic and sexually dimorphic species. Read More
Proc Biol Sci 2018 Nov 14;285(1891). Epub 2018 Nov 14.
School of Biosciences, University of Melbourne, Parkville, Victoria 3010, Australia.
Loss of dispersal typifies island biotas, but the selective processes driving this phenomenon remain contentious. This is because selection via, both indirect (e.g. Read More
Open Vet J 2018 30;8(2):224-228. Epub 2018 Jun 30.
Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
An 11-year-old, male North African spiny-tailed lizard () was presented with hyperkeratotic cheilitis. Based on clinical examination, histology and microbiological testing, was identified as the causative agent of the dermal disorder. Moreover, an abundant culture of was obtained following sampling of the oral cavity. Read More
Beilstein J Nanotechnol 2018 26;9:2561-2572. Epub 2018 Sep 26.
Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), Kaiserstrasse 12, 76131 Karlsruhe, Germany.
Reducing friction forces is a major challenge in many engineering applications involving moving parts. For the past 50 years, the morphological texturing of surfaces for improving tribological properties has been investigated. Only recently, the application of biologically inspired surface features, like scales found on lizards and snakes, has come to the attention of tribologists. Read More
PeerJ 2018 8;6:e5850. Epub 2018 Nov 8.
Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Matieland, South Africa.
For many taxa, new records of non-native introductions globally occur at a near exponential rate. We undertook a systematic review of peer-reviewed publications on non-native herpetofauna, to assess the information base available for assessing risks of future invasions, resulting in 836 relevant papers. The taxonomic and geographic scope of the literature was also compared to a published database of all known invasions globally. Read More
Anat Rec (Hoboken) 2018 Nov 12. Epub 2018 Nov 12.
Comparative Histolab Padova and Department of Biology at University of Bologna.
Tail regeneration in lizards is a unique case of organ regeneration among amniotes. The Review summarizes past and recent studies indicating that tail regeneration utilizes numerous signaling pathways typical for tumor growth. The regenerative blastema-cone contains sparse proliferating cells that utilize coding and non-coding RNAs in an environment rich in water and hyaluronate, as typical for tumor outgrowth. Read More
Chemosphere 2018 Nov 3;217:150-157. Epub 2018 Nov 3.
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing, 100085, PR China.
The neurotoxicity of dinotefuran, thiamethoxam and imidacloprid against Chinese lizards (Eremias argus) were evaluated in acute oral exposure and 28d subchronic exposure. Dinotefuran was not easily metabolized and showed strong persistence in the lizard brain. Thiamethoxam and imidacloprid were rapidly absorbed and excreted in lizards, and were not easily enriched in the lizard brain. Read More
Beilstein J Nanotechnol 2018 2;9:2618-2627. Epub 2018 Oct 2.
Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), H.-v.-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
Lizards of the genus are widely known under the common name sandfish due to their ability to swim in loose, aeolian sand. Some studies report that this fascinating property of sandfish is accompanied by unique tribological properties of their skin such as ultra-low adhesion, friction and wear. The majority of these reports, however, is based on experiments conducted with a non-standard granular tribometer. Read More
Zookeys 2018 1(794):135-163. Epub 2018 Nov 1.
Museo de Zoología, Escuela de Ciencias Biológicas, Pontificia Universidad Católica del Ecuador, Avenida 12 de Octubre 1076 y Roca, Quito, Ecuador Pontificia Universidad Católica del Ecuador Quito Ecuador.
A new species of lizard from the Andean slopes of southwestern Colombia and northwestern Ecuador, from between 1187 and 2353 m in elevation, is described. The new species can be distinguished from other in squamation, cranial osteology, hemipenial morphology, and nuclear and mitochondrial DNA. The new species is sister to , and it is suggested that previous records of in Colombia correspond to the new species described herein. Read More
Mycoses 2018 Nov 8. Epub 2018 Nov 8.
Discipline of Microbiology, School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg, South Africa.
Members of the genus Basidiobolus are potentially pathogenic fungi, known to cause mycoses in tropical and subtropical countries. Basidiobolus spp. can be associated with animals, and reptiles and amphibians are candidate vectors for the distribution of this fungus. Read More
Curr Zool 2018 Jun 21;64(3):335-344. Epub 2018 Mar 21.
Department of Biology, University of Puget Sound, 1500 N. Warner Street No. 1088, Tacoma, WA 98416-1088, USA.
High male mating effort and high variation in female quality select for male mate choice, which may be expressed as differential investment of reproductive effort based on female value. Male reproductive effort includes investment in direct contest competition with rival males for access to females, yet variation in male-male contest behavior is rarely examined in the context of male mate choice. We examine such male response to variation in female body size, reproductive state, and female-specific ornamentation in the striped plateau lizard, . Read More
Curr Zool 2018 Jun 19;64(3):293-302. Epub 2017 May 19.
Dept Ecología Evolutiva, Museo Nacional de Ciencias Naturales-CSIC, J. Gutiérrez Abascal 2, E-28006, Madrid, Spain.
The honesty of structural-based ornaments is controversial. Sexual selection theory predicts that the honesty of a sexual signal relies on its cost of production or maintenance. Therefore, environmental factors with negative impact on individuals could generate high costs and affect the expression of these sexual signals. Read More
Curr Zool 2018 Apr 15;64(2):197-204. Epub 2018 Feb 15.
Departamento de Zoología, Facultad de Ciencias, Universidad de Granada, Granada, E-18071, Spain.
Studying the causes of parasite geographic distribution is relevant to understand ecological and evolutionary processes that affect host populations as well as for species conservation. Temperature is one of the most important environmental variables affecting parasite distribution, as raising temperatures positively affect development, reproduction, and rate of transmission of both endo- and ectoparasites. In this context, it is generally accepted that, in mountains, parasite abundance decreases with elevation. Read More
Curr Zool 2018 Apr 27;64(2):165-171. Epub 2017 Mar 27.
School of Life Sciences, University of Technology Sydney, Broadway, NSW 2007, Australia.
Climate change is ranked as one of the most severe threats to global biodiversity. This global phenomenon is particularly true for reptiles whose biology and ecology are closely linked to climate. In this study, we used over 1,300 independent occurrence points and different climate change emission scenarios to evaluate the potential risk of changing climatic conditions on the current and future potential distribution of a rock-dwelling lizard; the velvet gecko. Read More
Nat Ecol Evol 2018 Dec 5;2(12):1854-1858. Epub 2018 Nov 5.
Centre for Ecological Sciences, Indian Institute of Science, Bengaluru, India.
Wind farms are a cleaner alternative to fossil fuels for mitigating the effects of climate change, but they also have complex ecological consequences. In the biodiversity hotspot of the Western Ghats in India, we find that wind farms reduce the abundance and activity of predatory birds (for example, Buteo, Butastur and Elanus species), which consequently increases the density of lizards, Sarada superba. The cascading effects of wind turbines on lizards include changes in behaviour, physiology and morphology that reflect a combination of predator release and density-dependent competition. Read More
Mol Phylogenet Evol 2019 Jan 26;130:244-258. Epub 2018 Oct 26.
Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China. Electronic address:
Late Cenozoic stepwise aridification has transformed Central Asia into an arid environment, and the Pleistocene climatic oscillations exerted further ecological impact. Therefore, both aridification and glaciation would have considerably influenced the evolution of many midlatitude species in arid Central Asia (ACA). However, strong biotic evidence supporting this role is still lacking. Read More
Glob Chang Biol 2018 Nov 2. Epub 2018 Nov 2.
Department of Biological Sciences, University of Rhode Island, Kingston, Rhode Island.
The urban heat island effect, where urban areas exhibit higher temperatures than less-developed suburban and natural habitats, occurs in cities across the globe and is well understood from a physical perspective and at broad spatial scales. However, very little is known about how thermal variation caused by urbanization influences the ability of organisms to live in cities. Ectotherms are sensitive to environmental changes that affect thermal conditions, and therefore, increased urban temperatures may pose significant challenges to thermoregulation and alter temperature-dependent activity. Read More
Ecol Evol 2018 Oct 17;8(19):9920-9933. Epub 2018 Sep 17.
College of Science and Engineering Flinders University Bedford Park South Australia Australia.
The major histocompatibility complex (MHC) is a large gene family that plays a central role in the immune system of all jawed vertebrates. Nonavian reptiles are underrepresented within the MHC literature and little is understood regarding the mechanisms maintaining MHC diversity in this vertebrate group. Here, we examined the relative roles of parasite-mediated selection and sexual selection in maintaining MHC class I diversity of a color polymorphic lizard. Read More
Ecol Evol 2018 Oct 3;8(19):9827-9833. Epub 2018 Sep 3.
Department of Biological and Environmental Sciences University of Gothenburg Gothenburg Sweden.
Sex determination in Australian agamid lizards shows a complex framework of different mechanisms, varying even among closely related taxa. It is clear that discrete classification of these species as either having genetic (GSD) or environmental sex determination (ESD) does not agree with empirical data. Although many species in this group show temperature-dependent sex determination (TSD), recent evidence suggests additional genetic or epigenetic effects. Read More
Sci Rep 2018 Oct 30;8(1):16055. Epub 2018 Oct 30.
Department of Life Science, National Taiwan Normal University, Taipei, 116, Taiwan.
Expression of nuptial color is usually energetically costly, and is therefore regarded as an 'honest signal' to reflect mate quality. In order to choose a mate with high quality, both sexes may benefit from the ability to precisely evaluate their mates through optimizing visual systems which is in turn partially regulated by opsin gene modification. However, how terrestrial vertebrates regulate their color vision sensitivity is poorly studied. Read More
Aust Vet J 2018 Nov;96(11):450-457
The University of Sydney, Camden, NSW, Australia.
Objective: The aim of this study was to determine baseline reference data for morphometric measurements and haematological and plasma biochemical parameters in clinically healthy eastern water dragons (Intellagama lesueurii lesueurii), accounting for the variables of season and sex. The clinical objective was to provide clinicians and researchers with baseline reference intervals (RIs) in order to assess accurately the health of a population or individual animals.
Methods: The study group comprised 39 free-ranging eastern water dragons. Read More
Mol Ecol 2018 Oct 28. Epub 2018 Oct 28.
School of Biological Sciences, The University of Wollongong, AUSTRALIA.
Telomeres are the non-coding protein-nucleotide 'caps' at chromosome ends that contribute to chromosomal stability by protecting the coding parts of the linear DNA from shortening at cell division, and from erosion by reactive molecules. Recently, there has been some controversy between molecular and cell biologists, on the one hand, and evolutionary ecologists on the other, regarding whether reactive molecules erode telomeres during oxidative stress. Many studies of biochemistry and medicine have verified these relationships in cell culture, but other researchers have failed to find such effects in free-living vertebrates. Read More