| age related differences in lipophilic compounds found in femoral gland secretions of male spiny-footed lizards, acanthodactylus erythrurus. | although chemoreception plays an important role in social organization of many lizards, only a few studies have examined the chemicals found in secretions used for intraspecific communication. we report the composition of the secretion of the femoral glands of males of the spiny-footed lizard (acanthodactylus erythrurus). on the basis of mass spectra, obtained by gc/ms, we identified 45 lipophilic compounds, including several alcohols ranging from 10 to 29 carbon atoms (mainly hexacosanol and te ... | 2005 | 16402553 |
| effect of testosterone on t cell-mediated immunity in two species of mediterranean lacertid lizards. | one of the primary assumptions of the immunocompetence handicap hypothesis is that testosterone has an immunosuppressive effect, but conflicting results have been reported in a variety of bird species concerning the effect of testosterone on the humoral and the t cell-mediated components of the immune system. the t cell-mediated component of the immune system is particularly important during the breeding season, because the likelihood of injury during sexual competition is high and t cell-mediat ... | 2004 | 15114648 |
| systematic and phylogeographical assessment of the acanthodactylus erythrurus group (reptilia: lacertidae) based on phylogenetic analyses of mitochondrial and nuclear dna. | we have used mitochondrial 12s rrna, 16s rrna and nuclear beta-fibrinogen (intron 7) sequences to investigate the phylogenetic and phylogeographic relationships between acanthodactylus erythrurus group species (except for a. boueti). the phylogenetic analyses of the acanthodactylus genus did not cluster a. guineensis and a. savignyi with the remaining species of the group (a. blanci, a. lineomaculatus and a. erythrurus). within the a. erythrurus group, the results of the mitochondrial dna (mtdna ... | 2009 | 19070671 |
| hormonal control of seasonal color change in female spiny-footed lizards: an observational and experimental approach. | breeding coloration of females often signals aspects of their reproductive status, suggesting a link between color and sex steroid hormones. in this study, we examined the relationships between 2 sex steroid hormones (progesterone and β-estradiol) and reproductive coloration in female spiny-footed lizards acanthodactylus erythrurus. we first explored natural variation in female plasma hormone levels and coloration during their reproductive cycle. β-estradiol was negatively related to brightness ... | 2019 | 31857810 |
| morphology and multilocus phylogeny of the spiny-footed lizard (acanthodactylus erythrurus) complex reveal two new mountain species from the moroccan atlas. | we generated an extensive morphological and multilocus molecular dataset to investigate the taxonomy of acanthodactylus erythrurus, a widespread species across the mediterranean and semiarid habitats of the iberian peninsula and the maghreb. our integrated analyses revealed the existence of at least five basal lineages: (i) an ibero-moroccan clade widespread across morocco and the iberian peninsula, from sea-level up to a maximal known altitude of 1,930 m, (ii) an algero-tunisian clade, distribu ... | 2020 | 32230110 |
| coloration reflects skin pterin concentration in a red-tailed lizard. | when integumentary tissue pigments are contained in chromatophores, tissue color might not depend exclusively on the amount of pigment. whether coloration does or does not reflect pigment concentration may be very significant for intraspecific communication, for example when pigment concentration provides fitness-related information. we studied the pigment responsible for the orange/red ventral tail coloring in a lacertid lizard species (acanthodactylus erythrurus), and whether the color was rel ... | 2016 | 26658422 |
| bipedalism in lizards: whole-body modelling reveals a possible spandrel. | this paper illustrates how simple mechanical models based on morphological, ethological, ecological and phylogenetic data can add to discussions in evolutionary biology. bipedal locomotion has evolved on numerous occasions in lizards. traits that appear repeatedly in independent evolutionary lines are often considered adaptive, but the exact advantages of bipedal locomotion in lizards remain debated. earlier claims that bipedalism would increase maximal running speed or would be energetically ad ... | 2003 | 14561343 |
| [action of injections of pituitary gonadotropic hormones on the genital tract of the lacertid: acanthodactylus erythrurus lineomaculatur]. | | 1963 | 14120938 |
| [demonstration of nuclear rna in the mature spermatids of acanthodactylus erythrurus lineomaculatus dum. & bibr. (lacertidae)]. | | 1971 | 5571736 |
| plasma cell clusters in the interstitial tissue of the testes of acanthodactylus erythrurus (reptilia, lacertidae). | | 1981 | 7345109 |
| ultrastructural study of the epithelial mucous cells in lizards (lacertilia). | an ultrastructural study of the mucous cells of the intestinal epithelium of four lacertilian species (lacerta lepida, lacerta hispanica, psammodromus algirus and acanthodactylus erythrurus) is here reported. two types of mucous cells have been found in these species: common mucous cells and granular mucous cells. immature and mature forms of both types have been observed. the common mucous cells or typical goblet cells have the same characteristics in all four species. the granules of the granu ... | 1982 | 7055841 |
| influence of heat transmission mode on heating rates and on the selection of patches for heating in a mediterranean lizard. | heliothermy (heat gain by radiation) has been given a prominent role in basking lizards. however, thigmothermy (heat gain by conduction) could be relevant for heating in small lizards. to ascertain the importance of the different heat transmission modes to the thermoregulatory processes, we conducted an experimental study where we analyzed the role of heat transmission modes on heating rates and on the selection of sites for heating in the mediterranean lizard acanthodactylus erythrurus (lacerti ... | 2008 | 12324893 |