| using nested clade analysis to assess the history of colonization and the persistence of populations of an iberian lizard. | the distribution of the lizard lacerta schreiberi is likely to have been severely affected by the climatic cycles that have influenced the iberian peninsula. information about the species ecology and iberian physiogeography was used to generate specific hypotheses about episodes of colonization and subsequent population persistence. these hypotheses generated predictions about the distribution of genetic variation, which were tested using nested clade analysis (nca) supplemented by analysis of m ... | 2002 | 11972766 |
| extensive intraspecific polymorphism detected by sscp at the nuclear c-mos gene in the endemic iberian lizard lacerta schreiberi. | c-mos is a highly conserved intronless gene that has proved useful in the analysis of ancient phylogenetic relationships within vertebrates. we selected the iberian endemic schreiber's green lizard (lacerta schreiberi) that persisted in allopatric refugia since the late pliocene to investigate the utility of the c-mos nuclear gene for intraspecific phylogeographic studies. our combination of dna sequencing with the high resolving power of single-strand conformational polymorphism (sscp) effectiv ... | 2006 | 16499698 |
| genealogy of the nuclear beta-fibrinogen locus in a highly structured lizard species: comparison with mtdna and evidence for intragenic recombination in the hybrid zone. | the study of nuclear genealogies in natural populations of nonmodel organisms is expected to provide novel insights into the evolutionary history of populations, especially when developed in the framework of well-established mtdna phylogeographical scenarios. in the iberian peninsula, the endemic schreiber's green lizard lacerta schreiberi exhibits two highly divergent and allopatric mtdna lineages that started to split during the late pliocene. in this work, we performed a fine-scale analysis o ... | 2006 | 16598190 |
| the limits of mtdna phylogeography: complex patterns of population history in a highly structured iberian lizard are only revealed by the use of nuclear markers. | phylogeographic analyses based on the sole use of the mitochondrial dna (mtdna) molecule reveal only a small part of the evolutionary history of a species or a set of related species. in this study, we have combined the application of slow- and fast-evolving nuclear markers (proteins and microsatellites, respectively) together with the analysis of two-gene genealogies to further understand the history of the iberian endemic schreiber's green lizard, lacerta schreiberi, a species for which a well ... | 2008 | 18828782 |
| variation in phenotype, parasite load and male competitive ability across a cryptic hybrid zone. | molecular genetic studies are revealing an increasing number of cryptic lineages or species, which are highly genetically divergent but apparently cannot be distinguished morphologically. this observation gives rise to three important questions: 1) have these cryptic lineages diverged in phenotypic traits that may not be obvious to humans; 2) when cryptic lineages come into secondary contact, what are the evolutionary consequences: stable co-existence, replacement, admixture or differentiation a ... | 2009 | 19479073 |
| spotted fever group rickettsiae detected in immature stages of ticks parasitizing on iberian endemic lizard lacerta schreiberi bedriaga, 1878. | spotted fever rickettsioses are tick-borne diseases of growing public health concern. the prevalence of rickettsia-infected ticks and their ability to parasitize humans significantly influence the risk of human infection. altogether 466 ixodes ricinus ticks (428 nymphs and 38 larvae) collected from 73 lacerta schreiberi lizards were examined by pcr targeting the citrate synthetase gene glta for the presence of rickettsia spp. rickettsial dna was detected in 47% of nymphs and 31.6% of larvae. the ... | 2015 | 26141751 |
| random sampling of squamate reptiles in spanish natural reserves reveals the presence of novel adenoviruses in lacertids (family lacertidae) and worm lizards (amphisbaenia). | here, we report the results of a large-scale pcr survey on the prevalence and diversity of adenoviruses (advs) in samples collected randomly from free-living reptiles. on the territories of the guadarrama mountains national park in central spain and of the chafarinas islands in north africa, cloacal swabs were taken from 318 specimens of eight native species representing five squamate reptilian families. the healthy-looking animals had been captured temporarily for physiological and ethological ... | 2016 | 27399970 |
| iridovirus-like viruses in erythrocytes of lacertids from portugal. | icosahedral nucleo-cytoplasmic large dna viruses (ncldv)-like viruses, which forminclusions in the erythrocyte cytoplasm of reptiles, were previously presented as candidates for a new genus of the iridoviridae family. the present work describes the distribution of infected lizard hosts and ultrastructural characteristics of the viral inclusions of ncldv-like viruses from portugal and adjacent locations in spain. giemsa-stained blood smears of 235 lacerta schreiberi from portugal and spain, 571 l ... | 2013 | 23806208 |
| experimental infection of lacertids with lizard erythrocytic viruses. | lizard erythrocytic viruses (levs) produce inclusions in the cytoplasm of erythrocytes, but their impact on the infected host is poorly understood. this work reports on an experimental study of the infection process in lacerta monticola and lacerta schreiberi from serra da estrela mountain, portugal. | 2002 | 12403919 |
| assessing the reliability of thermography to infer internal body temperatures of lizards. | for many years lizard thermal ecology studies have relied on the use of contact thermometry to obtain internal body temperature (tb) of the animals. however, with progressing technology, an interest grew in using new, less invasive methods, such as infrared (ir) pyrometry and thermography, to infer tbof reptiles. nonetheless few studies have tested the reliability of these new tools. the present study tested the use of ir cameras as a non-invasive tool to infer tbof lizards, using three differen ... | 2016 | 27839556 |
| does ecophysiology mediate reptile responses to fire regimes? evidence from iberian lizards. | background. reptiles are sensitive to habitat disturbance induced by wildfires but species frequently show opposing responses. functional causes of such variability have been scarcely explored. in the northernmost limit of the mediterranean bioregion, lizard species of mediterranean affinity (psammodromus algirus and podarcis guadarramae) increase in abundance in burnt areas whereas atlantic species (lacerta schreiberi and podarcis bocagei) decrease. timon lepidus, the largest mediterranean liza ... | 2016 | 27330864 |
| what are carotenoids signaling? immunostimulatory effects of dietary vitamin e, but not of carotenoids, in iberian green lizards. | in spite that carotenoid-based sexual ornaments are one of the most popular research topics in sexual selection of animals, the antioxidant and immunostimulatory role of carotenoids, presumably signaled by these colorful ornaments, is still controversial. it has been suggested that the function of carotenoids might not be as an antioxidant per se, but that colorful carotenoids may indirectly reflect the levels of nonpigmentary antioxidants, such as melatonin or vitamin e. we experimentally fed m ... | 2014 | 25326094 |
| phylogenetic analysis based on 18s rrna gene sequences of schellackia parasites (apicomplexa: lankesterellidae) reveals their close relationship to the genus eimeria. | in the present study we detected schellackia haemoparasites infecting the blood cells of lacerta schreiberi and podarcis hispanica, two species of lacertid lizards from central spain. the parasite morphometry, the presence of a refractile body, the type of infected blood cells, the kind of host species, and the lack of oocysts in the fecal samples clearly indicated these blood parasites belong to the genus schellackia. until now, the species of this genus have never been genetically characterize ... | 2013 | 23731491 |
| lipids in the femoral gland secretions of male schreiber's green lizards, lacerta schreiberi. | in spite of the importance of chemoreception and chemical signals in social organization of lizards, only a few studies have examined the chemical composition of secretions that lizards use for intraspecific communication. the secretion of the femoral glands of male schreiber's green lizards (lacerta schreiberi) contains 51 lipophilic compounds, including several steroids, a-tocopherol, n-c9 to n-c22 carboxylic acids and their esteres, and minor components such as alcohols between c12 and c24, t ... | 2009 | 17137126 |
| the persistence of pliocene populations through the pleistocene climatic cycles: evidence from the phylogeography of an iberian lizard. | ancient climatic fluctuations have caused changes in the demography and distribution of many species. the genetic differentiation between populations of the same species and of sister species is often attributed largely to the more recent pleistocene fluctuations. recent interpretations, which implicate earlier episodes, have proved controversial. we address the timing of genetic divergence in the iberian lizard lacerta schreiberi by studying the phylogeography of the cytochrome b sequence. the ... | 2001 | 11487410 |
| manipulation of parasite load induces significant changes in the structural-based throat color of male iberian green lizards. | 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. in this sense, parasites are a main cost for their hosts. to probe the effect of parasites on the structural-based coloration of a lacertid species lacerta schreiberi, we have ... | 2018 | 30402070 |
| diversity of karyolysus and schellackia from the iberian lizard lacerta schreiberi with sequence data from engorged ticks. | apicomplexan haemoparasites of the genera schellackia reichenow, 1919, and karyolysus labbé, 1894, seem to be common in lizards and widespread across the world. for decades, their identification has been based on morphological descriptions and life cycle patterns, with molecular characterizations, applied only recently. we used molecular characterization to confirm the identification of haemoparasites detected by microscopy in blood smears of lacerta schreiberi bedriaga, 1878, a lizard of the ib ... | 2019 | 31391126 |