| lithium secretion in kidneys of amphibians and reptiles under hydrated conditions. | renal lithium transport was studied at different hydration levels in five species of anuran amphibians (bufo bufo, b. danatensis, b. viridis, rana ridibunda, and r. temporaria), two species of urodeles (triturus vulgaris and t. cristatus) and four species of reptiles (lizards eremias multiocellata, lacerta vivipara, trapelus sanguinolentus, and teratoscincus scincus). under dehydration conditions, li+ was reabsorbed in the kidneys of amphibians ans reptiles, but to a lesser degree than in mammal ... | 1997 | 9505431 |
| sex reversal in reptiles: reproductive oddity or powerful driver of evolutionary change? | is sex a product of genes, the environment, or both? in this review, we describe the diversity of sex-determining mechanisms in reptiles, with a focus on systems that display gene-environment interactions. we summarise the field and laboratory-based evidence for the occurrence of environmental sex reversal in reptiles and ask whether this is a widespread evolutionary mechanism affecting the evolution of sex chromosomes and speciation in vertebrates. sex determination systems exist across a conti ... | 2016 | 27794577 |
| electrocardiogram and heart rate in response to temperature acclimation in three representative vertebrates. | comparisons of electrocardiogram (ecg) and heart rate characteristics of three representative species in response to temperature acclimation were studied. in toad (bufo raddei), t wave had positive, negative and flat patterns, which was different from positive in lizard (eremias multiocellata), blunt and broad in bird (alectories magna). the duration of p-r interval, q-t interval and qrs complex interval reduced with increasing temperature in toad, but the p-r and t-p intervals were affected mos ... | 2005 | 16249112 |
| isolation and sequence analysis of sox genes from lizard eremias multiocellata. | the sox (sry-related high-mobility-group box) family of genes shares a conserved hmg box and is involved in a diverse range of developmental processes and sex determination in vertebrates. twenty sox genes are present in the genomes of humans and mice, but far less is known about the sox gene family in reptiles. using two pairs of highly degenerate primers designed from a multiple alignment of sox amino acid sequences in several species, different positive clones were obtained from male and fema ... | 2012 | 22567858 |
| phylogeny and divergence times of some racerunner lizards (lacertidae: eremias) inferred from mitochondrial 16s rrna gene segments. | eremias, or racerunners, is a widespread lacertid genus occurring in china, mongolia, korea, central asia, southwest asia and southeast europe. it has been through a series of taxonomic revisions, but the phylogenetic relationships among the species and subgenera remain unclear. in this study, a frequently studied region of the mitochondrial 16s rrna was used to (i) reassess the phylogenetic relationships of some eremias species, (ii) test if the viviparous species form a monophyletic group, and ... | 2011 | 21767655 |
| thermal ecology of three coexistent desert lizards: implications for habitat divergence and thermal vulnerability. | how ectotherms exploit thermal resources has important implications for their habitat utilization and thermal vulnerability to climate warming. to address this issue, we investigated thermal relations of three sympatric lizard species (eremias argus, eremias multiocellata, and phrynocephalus przewalskii) in the desert steppe of inner mongolia, china. we determined the thermoregulatory behavior, body temperature (tb), operative temperature (te), selected body temperature (tsel), and critical ther ... | 2017 | 28324161 |
| food restriction affects maternal investment but not neonate phenotypes in a viviparous lizard. | food availability significantly affects an animal's energy metabolism, and thus its phenotype, survival, and reproduction. maternal and offspring responses to food conditions are critical for understanding population dynamics and life-history evolution of a species. in this study, we conducted food manipulation experiments in field enclosures to identify the effect of food restriction on female reproductive traits and postpartum body condition, as well as on hatchling phenotypes, in a lacertid v ... | 2017 | 28409503 |
| low precipitation aggravates the impact of extreme high temperatures on lizard reproduction. | extreme high temperatures are occurring more frequently with ongoing anthropogenic climate warming, but the experimental tests of the effects of high temperatures on terrestrial vertebrates in natural conditions are rare. in this study, we investigated the effects of extreme high temperatures on female reproduction and offspring traits of multi-ocellated racerunners (eremias multiocellata) kept in field enclosures in the desert steppe of inner mongolia. our studies indicate that high temperature ... | 2016 | 27638182 |
| identification of sex chromosomes by means of comparative genomic hybridization in a lizard, eremias multiocellata. | eremias multiocellata is a viviparous lizard that is known to exhibit temperature-dependent sex determination (tsd). conventional giemsa staining under light microscope examination has identified the karyotype of this species to be 2 n=36 i+2 m, with no detectable heteromorphic sex chromosomes. however, a highly differentiated female-specific chromosome, w, which is homomorphic with the z chromosome, is found in the present study by the high-resolution cytogenetic method of comparative genomic h ... | 2015 | 25826063 |
| the complete mitochondrial genome of eremias multiocellata (squamata: lacertidae). | in this paper, the complete mitochondrial genome of eremias multiocellata (squamata: lacertidae) is reported, which is a circular molecule of 19,385 bp in size. the nucleotides composition are 31.2% a, 28.9% t, 27.1% c and 13.4% g. the genome consists of 13 protein-coding genes, 22 transfer rnas, 2 ribosomal rna genes and 1 putative control region. | 2016 | 25211084 |
| ontogenetic and sexual differences of thermal biology and locomotor performance in a lacertid lizard, eremias multiocellata. | a viviparous lizard, eremias multiocellata, was used to investigate the possible sexual and ontogenetic effects on selected body temperature, thermal tolerance range and the thermal dependence of locomotor performance. we show that adults are sexually dimorphic and males have larger bodies and heads than females. adults selected higher body temperatures (34.5 vs. 32.4°c) and could tolerate a broader range of body temperatures (8.1-46.8 vs. 9.1-43.1°c) than juveniles. the sprint speed and maximum ... | 2013 | 24156978 |
| life-history variation with respect to experienced thermal environments in the lizard, eremias multiocellata (lacertidae). | we compared adult size, female reproductive traits, and offspring phenotypes between multiocellated racerunners (eremias multiocellata) from two thermally different sites (populations) in inner mongolia (north china): the colder one in wulatehouqi (wq) and the warmer one in dalateqi (dq). both adults and neonates were smaller in the colder site. females from the two sites both produced a single litter of 2-5 young per season, and did not differ in allocation of energy to reproduction after accou ... | 2011 | 21557656 |
| experimental warming induces oxidative stress and immunosuppression in a viviparous lizard, eremias multiocellata. | reptiles are especially vulnerable to climate warming because their behavior, physiology, and life history are highly dependent on environmental temperature. in this study, we envisaged new probable mechanisms underlying the high vulnerability of lizards, wherein heat exposure induces oxidative stress and leads to immunosuppression. to test this hypothesis, we conducted a warming experiment on a lizard (eremias multiocellata) from a desert steppe in inner mongolia from may to september using ope ... | 2020 | 32479390 |
| phenotypic plasticity may help lizards cope with increasingly variable temperatures. | temperature variability is predicted to increase in the coming century due to climate change. however, the biological impact of increased temperature variability on animals remains largely unexplored. here, we experimentally exposed gravid viviparous lizards (eremias multiocellata) to two thermal environments [constant daily maximum (cdm) versus variable daily maximum (vdm) treatment with the same average temperature] to address maternal and offspring responses to increased variability in ambien ... | 2018 | 29594611 |