| carnosine in the brain and olfactory system of amphibia and reptilia: a comparative study using immunocytochemical and biochemical methods. | the pattern of distribution of carnosine-like immunoreactivity and its relation to glial fibrillary acidic protein immunoreactivity have been studied in two lizards (gallotia galloti and tarentola delalandii) and in two anuran amphibians (rana esculenta and xenopus laevis) using immunocytochemical techniques. biochemical data obtained by paper electrophoresis show that the dipeptides carnosine and homocarnosine are both present in the brain of all the species examined. in the central nervous sys ... | 1991 | 1795878 |
| immunohistochemical localization of glutamine synthetase in mesencephalon and telencephalon of the lizard gallotia galloti during ontogeny. | the immunohistochemical localization of glutamine synthetase, an astrocyte marker in mammals, was determined in the telencephalon and mesencephalon of the lizard gallotia galloti during development by using an antiserum raised against chicken brain glutamine synthetase. ependymal glial cells and their radial processes were glutamine synthetase immunoreactive, and they were present also in the adult. immunoreactivity was also detected in two populations of scattered cell bodies, each preferential ... | 1990 | 1970551 |
| an ultrastructural study of the development of oligodendrocytes in the midbrain of the lizard. | oligodendrocyte development was investigated in the midbrain of the lizard gallotia galloti using the electron microscope. oligodendroblasts, which had a pale cytoplasm containing numerous microtubules in the perikaryon and processes, were present from e35. active oligodendrocytes had a pale nucleus, usually containing a nucleolus, and an electron-dense cytoplasm with long parallel stacks of rough endoplasmic reticulum. these were present from e37 to hatching which coincides with the period of r ... | 1990 | 2254169 |
| comparative distribution of neurotensin-like immunoreactivity in the brain of a teleost (carassius auratus), an amphibian (hyla meridionalis), and a reptile (gallotia galloti). | the distribution of neurotensin (nt) was studied in the brain of three species belonging to the three major classes of cold-blooded vertebrates: teleost fishes (carassius auratus), anuran amphibians (hyla meridionalis), and reptiles (gallotia galloti; lacertidae). by using antibodies directed against synthetic bovine nt in the three species, immunoreactive cell bodies were discovered mostly in the telencephalon and diencephalon, in particular at the level of the preoptic region the mediobasal hy ... | 1994 | 7836560 |
| distribution of choline acetyltransferase immunoreactivity in the brain of the lizard gallotia galloti. | the aim of the present study is to provide a complete description of the distribution of choline acetyltransferase (chat) immunoreactivity (i) in the brain of the lizard gallotia galloti, on the basis of two different primary antisera: rat anti-chat and rabbit anti-chicken chat. considering that the brain is a segmented structure, we have analysed our data with respect to transverse segmental domains (or neuromeres), which have been previously described by several authors in the brain of vertebr ... | 1993 | 8509502 |
| phylogenetic relationships of the canary islands endemic lizard genus gallotia (sauria: lacertidae), inferred from mitochondrial dna sequences. | phylogenetic relationships among species and subspecies of the canary island endemic lizard genus gallotia are inferred based on nucleotide sequences of fragments of 12s ribosomal rna and cytochrome b mitochondrial genes. the four morphologically established species have also been recognized at the molecular level. relative affinities among species follow an eastern-western geographic transect. the nearly extinct species gallotia simonyi from the most western island of el hierro is closely relat ... | 1996 | 8812306 |
| serum "b" esterases as a nondestructive biomarker for monitoring the exposure of reptiles to organophosphorus insecticides. | a field study was conducted to validate serum b esterases as nondestructive biomarkers (ndbs) in lizards. serum butyrylcholinesterase (bche) and carboxylesterase (cbe) activities were measured in lizards and four species of birds collected in an area of 0.5 ha sprayed with 0.36 kg a.i./ha of folidol se5 (5% parathion). serum b esterase activities were determined in a total of 213 lizards (gallotia galloti) and 81 birds of four species (sylvia melanocephala, serinus canaria, parus caeruleus, and ... | 1997 | 9352213 |
| retinal axon regeneration in the lizard gallotia galloti in the presence of cns myelin and oligodendrocytes. | retinal ganglion cell (rgc) axons in lizards (reptiles) were found to regenerate after optic nerve injury. to determine whether regeneration occurs because the visual pathway has growth-supporting glia cells or whether rgc axons regrow despite the presence of neurite growth-inhibitory components, the substrate properties of lizard optic nerve myelin and of oligodendrocytes were analyzed in vitro, using rat dorsal root ganglion (drg) neurons. in addition, the response of lizard rgc axons upon con ... | 1998 | 9562185 |
| nonlinear, fractal, and spectral analysis of the eeg of lizard, gallotia galloti. | electroencephalogram (eeg) from dorsal cortex of lizard gallotia galloti was analyzed at different temperatures to test the presence of fractal or nonlinear structure during open (oe) and closed eyes (ce), with the aim of comparing these results with those reported for human slow-wave sleep (sws). two nonlinear parameters characterizing eeg complexity [correlation dimension (d2)] and predictability [largest lyapunov exponent (lambda(1))] were calculated, and eeg spectrum and fractal exponent bet ... | 1999 | 10409261 |
| highly polymorphic microsatellites in the lacertid gallotia galloti from the western canary islands. | | 2000 | 11091329 |
| life cycle and parasitic interaction of the lizard-parasitizing mite ophionyssus galloticolus (acari: gamasida: macronyssidae), with remarks about the evolutionary consequences of parasitism in mites. | wild-caught specimens of the lacertid lizard gallotia galloti eisentrauti from the canary island of tenerife were checked for ectoparasites. the parasitic gamasid mite ophionyssus galloticolus fain and bannert (2000) was very abundant on these lizards. additionally, parasitism by larvae of two species of trombiculidae (prostigmata: parasitengona) was observed. o. galloticolus was reared in the laboratory on its natural host in order to investigate its life cycle, reproductive biology, and develo ... | 2000 | 11201353 |
| can microsatellites be used to infer phylogenies? evidence from population affinities of the western canary island lizard (gallotia galloti). | population phylogeographic studies are generally based solely on mtdna without corroboration, from an independent segregating unit (i.e., nuclear genes), that the mtdna gene tree represents the organismal phylogeny. this paper attempts to evaluate the utility of microsatellites for this process by use of the western canary island lacertid (gallotia galloti) as a model. the geological times of island eruptions are known, and well-supported mtdna phylogenies exist (corroborated as the organismal p ... | 2001 | 11527463 |
| evidence of state-dependent interhemispheric relationships in lizard eeg during the awake state. | the electroencephalogram (eeg) from both hemispheres of eight canary lizards gallotia galloti was registered at 25 degrees c and 35 degrees c during awake state with open eyes (oe) and closed eyes. the possible interdependence between the recorded eegs was assessed by means of newly developed methods of multivariate nonlinear time-series analysis. the interdependence turned out to be significant and greater for the oe state at both temperatures, although it was of linear type in most of the case ... | 2002 | 12046700 |
| evaluating reptile exposure to cholinesterase-inhibiting agrochemicals by serum butyrylcholinesterase activity. | blood samples from lizards (gallotia galloti) collected from two agricultural areas (las galletas and punta del hidalgo) and two reference areas on the island of tenerife (canary islands, spain) were analyzed for butyrylcholinesterase (bche) activity. serum bche activity was characterized first by in vitro experiments using selective substrates and inhibitors. of the total cholinesterase (che) activity, 74% could be attributed to bche activity. this portion of the total che activity was inhibite ... | 2003 | 12558160 |
| the lizard gallotia galloti as a bioindicator of organophosphorus contamination in the canary islands. | the aim of this study is to propose a bioindicator organism, the lizard gallotia galloti, and a nondestructive biomarker assay, utilising serum butyrylcholinesterase, for the assessment of the toxicological impact of organophosphorus (op) insecticides in the canary islands. laboratory and field studies were performed using the op insecticide trichlorphon. in the laboratory study, experimental groups of gallotia galloti were treated with 5, 50 and 100 mg/kg of trichlorphon, respectively, and afte ... | 1995 | 15091578 |
| inhibition of plasma butyrylcholinesterase activity in the lizard gallotia galloti palmae by pesticides: a field study. | a field study was performed to evaluate the effect of exposure to organophosphorus (op) and carbamate (cb) pesticides on the lizard gallotia galloti palmae. butyrylcholinesterase (bche) activity was measured in the plasma of 420 lizards collected from agricultural and reference areas on the island of la palma (canary islands, spain) in two sampling periods. exposure to cholinesterase-inhibiting pesticides was evaluated by a statistical criterion based on a threshold value (two standard deviation ... | 2004 | 15325464 |
| geological history and within-island diversity: a debris avalanche and the tenerife lizard gallotia galloti. | several processes have been described that could explain geographical variation and speciation within small islands, including fragmentation of populations through volcanic eruptions. massive landslides, or debris avalanches, could cause similar effects. here we analyse the potential impact of the 0.8 million-year-ago (ma) güimar valley debris avalanche on the phylogeography of the lizard gallotia galloti on the canary island of tenerife. distributions of mitochondrial dna lineages (based on cyt ... | 2006 | 17032262 |
| tenascin-r and axon growth-promoting molecules are up-regulated in the regenerating visual pathway of the lizard (gallotia galloti). | it is currently unclear whether retinal ganglion cell (rgc) axon regeneration depends on down-regulation of axon growth-inhibitory proteins, and to what extent outgrowth-promoting substrates contribute to rgc axon regeneration in reptiles. we performed an immunohistochemical study of the regulation of the axon growth-inhibiting extracellular matrix molecules tenascin-r and chondroitin sulphate proteoglycan (cspg), the axon outgrowth-promoting extracellular matrix proteins fibronectin and laminin ... | 2008 | 18361401 |
| opportunistic nectar-feeding birds are effective pollinators of bird-flowers from canary islands: experimental evidence from isoplexis canariensis (scrophulariaceae). | insular floras, characterized by simple pollination networks, sometimes include novel mutualistic agents such as nonspecialist nectarivores. in this study we confirmed the effective pollination of isoplexis canariensis by opportunistic nectar-feeding birds in tenerife, canary islands, spain. this plant is among the ornithophilous species of the canarian flora that lack past and present specialist nectarivorous birds. experimental hand pollinations revealed self-compatibility, but cross-pollinate ... | 2008 | 21628148 |
| spectral analysis of heart rate variability of lizard, gallotia galloti. | the beat-to-beat heart rate of the lizard, gallotia galloti, at rest shows short-term oscillations, the frequency of which varies with body temperature. spectral analysis of the heart rate variability signal shows that, above 20 degrees c, two major frequency components are present: the first component has a mean frequency ranging from 0.032 at 20 degrees c to 0.070 hz at 35 degrees c and the second from 0.039 at 20 degrees c to 0.10 hz at 35 degrees c of body temperature. the beat-to-beat heart ... | 2012 | 3344834 |
| the lacertidian reticular thalamic nucleus topographically upon the dorsal thalamus: experimental study in gallotia galloti. | the projection pattern of the ventral thalamic reticular nucleus onto the dorsal thalamus was studied in the lizard gallotia galloti using in vitro horseradish peroxidase and fluorescent carbocyanine labelling techniques. localized label deposits at three dorsoventrally spaced sites in the dorsal thalamus elicited retrograde transport into separate, though partly overlapping, medial, dorsolateral and ventrolateral sectors within an extended cytoarchitectonic complex which may be globally identif ... | 1994 | 8027439 |
| afferent connections of the habenular complex in the lizard gallotia galloti. | afferents to the habenular complex were studied by means of in vitro horseradish peroxidase retrograde labeling and anterograde control experiments in the lizard gallotia galloti. the medial habenular nucleus was found to receive abundant afferent fibers from the nucleus of the posterior pallial commissure and the nucleus septalis impar. more restricted input comes from the nucleus eminentiae thalami and the nucleus of the stria medullaris. the lateral habenular nucleus is innervated by various ... | 1992 | 1498653 |
| cholinergic, monoaminergic and peptidergic innervation of the primary visual centers in the brain of the lizards gekko gecko and gallotia galloti. | in order to study the relationship between retinal projections and immunohistochemically identified neurotransmitter systems in the primary visual centers of the brain in lizards, intraocular injections of horseradish peroxidase were combined with immunohistochemistry. antibodies raised against six substances were applied: choline acetyltransferase (chat), serotonin (5-ht), tyrosine hydroxylase (th), dopamine (da), substance p (sp), and leu-enkephalin (lenk). in the primary visual centers of the ... | 1992 | 1280514 |
| failure to restore vision after optic nerve regeneration in reptiles: interspecies variation in response to axotomy. | optic nerve regeneration within the reptiles is variable. in a snake, viper aspis, and the lizard gallotia galloti, regeneration is slow, although some retinal ganglion cell (rgc) axons eventually reach the visual centers (rio et al. [1989] brain res 479:151-156; lang et al. [1998] glia 23:61-74). by contrast, in a lizard, ctenophorus ornatus, numerous rgc axons regenerate rapidly to the visual centers, but unless animals are stimulated visually, the regenerated projection lacks topography and a ... | 2004 | 15368531 |
| cannibalism and autotomy as predator-prey relationship for monoxenous sarcosporidia. | in search for the final host of sarcocystis gallotiae, sarcocysts of naturally infected canarian lizards, gallotia galloti, were fed to vertebrate predators of the lizard. repeated transmission experiments remained negative. routine check of the feces of the wild g. galloti revealed shedding of sporocysts. the sporocysts were administered to small vertebrates, which may function as prey for g. galloti. the transmission experiments remained negative. the observation of a high intraspecific aggres ... | 1987 | 3125543 |
| distribution of neurotrophin-3 during the ontogeny and regeneration of the lizard (gallotia galloti) visual system. | we have previously described the spontaneous regeneration of retinal ganglion cell axons after optic nerve (on) transection in the adult gallotia galloti. as neurotrophin-3 (nt-3) is involved in neuronal differentiation, survival and synaptic plasticity, we performed a comparative immunohistochemical study of nt-3 during the ontogeny and regeneration (after 0.5, 1, 3, 6, 9, and 12 months postlesion) of the lizard visual system to reveal its distribution and changes during these events. for chara ... | 2008 | 17918240 |
| interpopulational and seasonal variation in the chemical signals of the lizardgallotia galloti. | communicative traits are strikingly diverse and may vary among populations of the same species. within a population, these traits may also display seasonal variation. chemical signals play a key role in the communication of many taxa. however, we still know far too little about chemical communication in some vertebrate groups. in lizards, only a few studies have examined interpopulational variation in the composition of chemical cues and signals and only one study has explored the seasonal effec ... | 2017 | 29230352 |
| genomic signatures of historical allopatry and ecological divergence in an island lizard. | geographical variation among contiguous populations is frequently attributed to ecological divergence or historical isolation followed by secondary contact. distinguishing between these effects is key to studies of incipient speciation and could be revealed by different genomic signatures. we used rad-seq analyses to examine morphologically divergent populations of the endemic lizard (gallotia galloti) from the volcanic island of tenerife. previous analyses have suggested ecological and historic ... | 2016 | 28040775 |
| regenerating reptile retinas: a comparative approach to restoring retinal ganglion cell function. | transection or damage to the mammalian optic nerve generally results in loss of retinal ganglion cells by apoptosis. this cell death is seen less in fish or amphibians where retinal ganglion cell survival and axon regeneration leads to recovery of sight. reptiles lie somewhere in the middle of this spectrum of nerve regeneration, and different species have been reported to have a significant variation in their retinal ganglion cell regenerative capacity. the ornate dragon lizard ctenophoris orna ... | 2017 | 27834958 |
| nogo-a does not inhibit retinal axon regeneration in the lizard gallotia galloti. | the myelin-associated protein nogo-a contributes to the failure of axon regeneration in the mammalian central nervous system (cns). inhibition of axon growth by nogo-a is mediated by the nogo-66 receptor (ngr). nonmammalian vertebrates, however, are capable of spontaneous cns axon regeneration, and we have shown that retinal ganglion cell (rgc) axons regenerate in the lizard gallotia galloti. using immunohistochemistry, we observed spatiotemporal regulation of nogo-a and ngr in cell bodies and a ... | 2017 | 27616630 |
| a structural colour ornament correlates positively with parasite load and body condition in an insular lizard species. | pigment-based ornaments in vertebrates may reflect the body condition or health status of the individual in correlation with environmental stress and hormonal balance. among the environmental factors shaping sexual colouration, parasitic infections have been stressed as an important evolutionary pressure constraining the maintenance of pigment-based ornaments. however, the honesty of structure-based ornaments in vertebrates is still under debate. structural uv-biased ornaments in gallotia lizard ... | 2016 | 27262291 |
| variable functional recovery and minor cell loss in the ganglion cell layer of the lizard gallotia galloti after optic nerve axotomy. | the lizard gallotia galloti shows spontaneous and slow axon regrowth through a permissive glial scar after optic nerve axotomy. although much of the expression pattern of glial, neuronal and extracellular matrix markers have been analyzed by our group, an estimation of the cell loss in the ganglion cell layer (gcl) and the degree of visual function recovery remained unresolved. thus, we performed a series of tests indicative of effective visual function (pupillary light reflex, accommodation, vi ... | 2014 | 24184031 |
| regrowth of transected retinal ganglion cell axons despite persistent astrogliosis in the lizard (gallotia galloti). | we analysed the astroglia response that is concurrent with spontaneous axonal regrowth after optic nerve (on) transection in the lizard gallotia galloti. at different post-lesional time points (0.5, 1, 3, 6, 9 and 12 months) we used conventional electron microscopy and specific markers for astrocytes [glial fibrillary acidic protein (gfap), vimentin (vim), sex-determining region y-box-9 (sox9), paired box-2 (pax2)¸ cluster differentiation-44 (cd44)] and for proliferating cells (pcna). the experi ... | 2013 | 23656528 |
| dermatophytosis caused by trichophyton spp. in a tenerife lizard (gallotia galloti): an immunohistochemical study. | reports of dermatophytosis in reptiles are rare. this report describes the microscopical and immunohistochemical findings in a case of dermatophytosis caused by trichophyton spp. in a 2-year-old tenerife lizard (gallotia galloti) with ulcerative and pustular skin lesions. microscopically, the lesions were characterized by superficial epidermal pustules containing heterophils with numerous fungal hyphae that stained by periodic acid-schiff and grocott's stain. fungal culture was not performed, bu ... | 2013 | 23351505 |
| neuronal and glial differentiation during lizard (gallotia galloti) visual system ontogeny. | we studied the histogenesis of the lizard visual system (e30 to adulthood) by using a selection of immunohistochemical markers that had proved relevant for other vertebrates. by e30, the pax6(+) pseudostratified retinal epithelium shows few newborn retinal ganglion cells (rgcs) in the centrodorsal region expressing neuron- and synaptic-specific markers such as betaiii-tubulin (tuj1), synaptic vesicle protein-2 (sv2), and vesicular glutamate transporter-1 (vglut1). concurrently, pioneer rgc axons ... | 2012 | 22173915 |
| development of astroglia heterogeneously expressing pax2, vimentin and gfap during the ontogeny of the optic pathway of the lizard (gallotia galloti): an immunohistochemical and ultrastructural study. | the successful regrowth of retinal ganglion cell (rgc) axons after optic nerve (on) axotomy in gallotia galloti indicates a permissive role of the glial environment. we have characterised the astroglial lineage of the lizard optic pathway throughout its ontogeny (embryonic stage 30 [e30] to adults) by using electron microscopy and immunohistochemistry to detect the proliferation marker pcna (proliferating cell nuclear antigen), the transcription factor pax2 and the gliofilament proteins vimentin ... | 2011 | 21826443 |
| expression of bdnf and nt-3 during the ontogeny and regeneration of the lacertidian (gallotia galloti) visual system. | retinal ganglion cell (rgc) axons regrow spontaneously after optic nerve (on) transection in g. galloti. because brain-derived neurotrophic factor (bdnf) is considered the major neurotrophin participating in vertebrate visual system development and promotes rgc survival, we investigated its distribution using dual-labeling immunohistochemistry for neuronal and glial markers. we examined the developing and regenerating lizard visual system at 1, 3, 6, 9, and 12 months postlesion to comparatively ... | 2011 | 21692190 |
| study of adult neurogenesis in the gallotia galloti lizard during different seasons. | in a previous study we found a seasonal distribution of cell proliferation (the first stage of adult neurogenesis) in the telencephalic ventricular walls of the adult gallotia galloti lizard. the aim of the present work was to determine the influence of seasonality on the subsequent migration of the resulting immature neurons. we used wild animals injected with bromodeoxyuridine and kept in captivity within 30 days. to confirm the neuronal identity of these cells, we used double immunohistochemi ... | 2011 | 21419108 |
| ontogeny of the conus papillaris of the lizard gallotia galloti and cellular response following transection of the optic nerve: an immunohistochemical and ultrastructural study. | spontaneous regrowth of the axons of retinal ganglion cells (rgc) occurs after unilateral optic nerve transection (ont) in the lizard gallotia galloti. we have performed an immunohistochemical and ultrastructural study of the conus papillaris (cp) of this lizard during ontogeny and after ont in order to characterize its cell subpopulations, innervation and putative blood-brain barrier (bbb) and to evaluate changes occurring throughout regeneration. proliferating pcna(+) cells were abundant betwe ... | 2011 | 21347575 |
| expression of neuronal markers, synaptic proteins, and glutamine synthetase in the control and regenerating lizard visual system. | spontaneous regrowth of retinal ganglion cell (rgc) axons occurs after optic nerve (on) transection in the lizard gallotia galloti. to gain more insight into this event we performed an immunohistochemical study on selected neuron and glial markers, which proved useful for analyzing the axonal regrowth process in different regeneration models. in the control lizards, rgcs were beta-iii tubulin- (tuj1) and hucd-positive. the vesicular glutamate transporter-1 (vglut1) preferentially stained rgcs an ... | 2010 | 20737600 |
| effects of testosterone on morphology, performance and muscle mass in a lizard. | because sexual selection pressures are high in sexually dimorphic organisms, morphological, physiological and performance traits are often studied in a sexual selection context. the proximate mechanisms underlying evolutionary change in these traits, however, remain largely unstudied. here, we examined the role of steroids in shaping morphology and physiological performance in males of a sexually dimorphic lizard (gallotia galloti). we compared morphology and physiological performance of males w ... | 2010 | 19816908 |
| nonlinearity and fractality in the variability of cardiac period in the lizard, gallotia galloti: effects of autonomic blockade. | both nonlinear and fractal properties of beat-to-beat r-r interval variability signal (rrv) of freely moving lizards (gallotia galloti) were studied in baseline and under autonomic nervous system blockade. nonlinear techniques allowed us to study the complexity, chaotic behavior, nonlinearity, stationarity, and regularity over time of rrv. scaling behavior of rrv was studied by means of fractal techniques. the autonomic nervous system blockers used were atropine, propranolol, prazosin, and yohim ... | 2008 | 18685061 |
| seasonal differences in ventricular proliferation of adult gallotia galloti lizards. | lizards present neuronal production throughout the telencephalon in their adult state, both naturally and after experimentally induced brain lesions. as in birds, lizards present seasonal behavioural variations. in birds, such variations have been shown to alter neuronal production. in birds and mammals, lack of stimuli or exposure to stress interferes with adult neurogenetic capacity. the effect of this type of study has not been performed with lizards. in the present study we used bromodeoxyur ... | 2008 | 18178172 |
| autonomic mediation in the interdependences between cardiocortical activity time variations and between cardiorespiratory activity time variations in the lizard, gallotia galloti. | multivariate nonlinear analysis methods were applied to variability time series extracted from electrocardiographic, electrocorticographic and respiratory activities of gallotia galloti lizards, to study interdependences between cardio-cortical activity time variations, and between cardio-respiratory activity time variations. autonomic nervous system involvement in the mediation of such interdependences was investigated through pharmacological blockade. cardiac variability was evaluated from the ... | 2008 | 17988910 |
| peculiar and typical oligodendrocytes are involved in an uneven myelination pattern during the ontogeny of the lizard visual pathway. | we studied the myelination of the visual pathway during the ontogeny of the lizard gallotia galloti using immunohistochemical methods to stain the myelin basic protein (mbp) and proteolipid protein (plp/dm20), and electron microscopy. the staining pattern for the plp/dm20 and mbp overlapped during the lizard ontogeny and was first observed at e39 in cell bodies and fibers located in the temporal optic nerve, optic chiasm, middle optic tract, and in the stratum album centrale of the optic tectum ... | 2006 | 16929522 |
| the midbrain of sauropsides shares a common subdivision pattern defined by embryonic radial glia. | in a previous study of the embryonic midbrain radial glia in a lizard, we observed that these cells define boundaries and regional subdivisions in a pattern that largely supports the adult model [c. diaz, c. yanes, c.m feminine. trujillo, l. puelles, cytoarchitectonic subdivisions in the subtectal midbrain of the lizard gallotia galloti, j. neurocytol. 29 (2000) 569-593]. with the goal to check whether the midbrain of chick embryos has a similar pattern, we examined the radial glia distribution ... | 2005 | 16144636 |
| time-related interdependence between low-frequency cortical electrical activity and respiratory activity in lizard, gallotia galloti. | electroencephalograms of medial cortex and electromyograms of intercostal muscles (emg-icm) were simultaneously recorded in the lizard, gallotia galloti, during two daily time periods (at daytime, dtp: 1200-1600 h; by night, ntp: 0000-0400 h), to investigate whether a relationship exists between the respiratory and cortical electrical activity of reptiles, and, if so, how this relationship changes during the night rest period. testing was carried out by studying interdependence between cortical ... | 2005 | 15726633 |
| radial glial cells, proliferating periventricular cells, and microglia might contribute to successful structural repair in the cerebral cortex of the lizard gallotia galloti. | reptiles are the only amniotic vertebrates known to be capable of spontaneous regeneration of the central nervous system (cns). in this study, we analyzed the reactive changes of glial cells in response to a unilateral physical lesion in the cerebral cortex of the lizard gallotia galloti, at 1, 3, 15, 30, 120, and 240 days postlesion. the glial cell markers glial fibrillary acidic protein (gfap), glutamine synthetase (gs), s100 protein, and tomato lectin, as well as proliferating cell nuclear an ... | 2004 | 15191804 |
| radial glia defines boundaries and subdivisions in the embryonic midbrain of the lizard gallotia galloti. | we have studied the organization of the midbrain radial glia in embryos of gallotia galloti using the fluorescent lipophilic dye 1,1'-dioctadecyl-3,3,3',3'-tetramethyl-indocarbocyanine perchlorate (dii) and the antibodies h5 and rc2. our goal was to verify if the radial glia takes part in the midbrain boundaries formation and if it defines different zones. our exam reveals two clear limits, anterior or mesencephalic-diencephalic (m/d) and posterior or mesencephalic-rhombencephalic (m/r), that ca ... | 2004 | 15101087 |
| s100 immunoreactive glial cells in the forebrain and midbrain of the lizard gallotia galloti during ontogeny. | we identified s100 immunoreactive cells in the brain of the lizard gallotia galloti during ontogeny using immunohistochemical techniques for light and electron microscopy. in double labeling experiments with antibodies specific for s100a1 and s100b (anti-s100) and proliferative cell nuclear antigen (anti-pcna), myelin basic protein (anti-mbp), phosphorylated neurofilaments (smi-31), glial fibrillary acidic protein (anti-gfap), or glutamine synthetase (anti-gs), we detected s100-like immunoreacti ... | 2003 | 12973828 |
| na+,k+-atpase subunit isoforms of the developing central nervous system of the lizard gallotia galloti. | | 2003 | 12763897 |
| neuronal differentiation patterns in the optic tectum of the lizard gallotia galloti. | this study examines in detail the sequences of morphological differentiation and deduces mode of migration into specific layers of all types of neurons present in the optic tectum of the lizard gallotia galloti. it complements previous similar work on tectal histogenesis in the chick. it was found that the neuronal population diversity in the lizard tectum can be reduced by developmental analysis to three neuroblast classes, called types i, ii and iii. these classes correspond closely to those p ... | 2003 | 12763592 |
| regulation of l-alanine transport systems a and asc by cyclic amp and calcium in a reptilian duodenal model. | the regulation of neutral amino acid transport by cyclic amp (camp) and calcium across the isolated duodenum of the lizard gallotia galloti has been studied under short-circuit conditions. active l-alanine transport was stimulated by forskolin, theophylline and dibutyryl cyclic amp (db-camp). all these agents increased transmural potential difference (pd) and short-circuit current (i(sc)) in a manner consistent with the activation of a chloride secretory pathway. both forskolin and theophylline ... | 2003 | 12654897 |
| lizard cholinesterases as biomarkers of pesticide exposure: enzymological characterization. | here we report the results of a study conducted to elucidate the enzymological characteristics of lizard cholinesterases (ches) in order to use them as potential biomarkers for pesticide exposure. serum and brain tissue of the lizard gallotia galloti were used as che sources and in vitro assays were performed to identify acetylcholinesterase (ache) and butyrylcholinesterase (bche) activities. the ph, substrate concentration, and specificity for che assays as well as the response of serum bche to ... | 2002 | 12389909 |
| regeneration of retinal axons in the lizard gallotia galloti is not linked to generation of new retinal ganglion cells. | using anterograde tracing with hrp and antibodies (abs) against neurofilaments, we show that regrowth of retinal ganglion cell (rgc) axons in the lizard gallotia galloti commences only 2 months after optic nerve transection (ons) and continues over at least 9 months. this is unusually long when compared to rgc axon regeneration in fish or amphibians. following ons, lizard rgcs up-regulate the immediate early gene c-jun for 9 months or longer, indicating their reactive state. in keeping with the ... | 2002 | 12210099 |
| proximate causes of intraspecific variation in locomotor performance in the lizard gallotia galloti. | to understand the evolution of biological traits, information on the degree and origins of intraspecific variation is essential. because adaptation can take place only if the trait shows heritable variation, it is important to know whether (at least) part of the trait variation is genetically based. we describe intra- and interindividual variation in three performance measures (sprint speed, climbing, and clambering speed) in juvenile gallotia galloti lizards from three populations and examine h ... | 2009 | 11731985 |
| cytoarchitectonic subdivisions in the subtectal midbrain of the lizard gallotia galloti. | contemporary study of molecular patterning in the vertebrate midbrain is handicapped by the lack of a complete topological map of the diverse neuronal complexes differentiated in this domain. the relatively less deformed reptilian midbrain was chosen for resolving this fundamental issue in a way that can be extrapolated to other tetrapods. the organization of midbrain centers was mapped topologically in terms of longitudinal columns and cellular strata on transverse, nissl-stained sections in th ... | 2000 | 11283413 |
| evidence that ultraviolet markings are associated with patterns of molecular gene flow. | recent studies have shown uv vision and markings to be important in vertebrates, particularly birds, where behavioral experiments have demonstrated its potential importance in sexual selection. however, there has been no genetic evidence that uv markings determine patterns of evolution among natural populations. here we report molecular evidence that uv markings are associated with the pattern of gene flow in the tenerife lizard (gallotia galloti). this species has vicariance-induced, approximat ... | 2001 | 11259681 |
| electrogenic na(+)-dependent l-alanine transport in the lizard duodenum. involvement of systems a and asc. | l-alanine transport across the isolated duodenal mucosa of the lizard gallotia galloti has been studied in ussing chambers under short-circuit conditions. net l-alanine fluxes, transepithelial potential difference (pd), and short-circuit current (isc) showed concentration-dependent relationships. na(+)-dependent l-alanine transport was substantially inhibited by the analog alpha-methyl aminoisobutyric acid (meaib). likewise, meaib fluxes were completely inhibited by l-alanine, indicating the pre ... | 2001 | 11171637 |
| membrane mechanisms for electrogenic na(+)-independent l-alanine transport in the lizard duodenal mucosa. | the active na(+)-independent transport of l-alanine across the duodenal mucosa of the lizard gallotia galloti was studied in ussing-type chambers using a computer-controlled voltage clamp. addition of l-alanine to the na(+)-free bathing solutions resulted in a significant l-alanine absorption (j(net)) that was paralleled by an increase in transepithelial short-circuit current (i(sc)) and potential difference (pd) without apparent changes in the tissue conductance. the concentration dependence of ... | 2000 | 10956250 |
| relationship between cortical electrical and cardiac autonomic activities in the awake lizard, gallotia galloti. | ecg and eeg signals were simultaneously recorded in lizards, gallotia galloti, both in control conditions and under autonomic nervous system (ans) blockade, in order to evaluate possible relationships between the ans control of heart rate and the integrated central nervous system activity in reptiles. the ans blockers used were prazosin, propranolol, and atropine. time-domain summary statistics were derived from the series of consecutive r-r intervals (rri) of the ecg to measure beat-to-beat hea ... | 2000 | 10861546 |
| diencephalic neuronal populations projecting axons into the basal plate in a lizard (gallotia galloti). | lizard diencephalic populations sending axons into the basal plate were studied by the in vitro hrp technique in the lizard gallotia. retrograde labeled cells were concentrated in distinct neuronal groups within alar plates of prosomeres p1 and p3, whereas the alar plate of p2 was poorly labeled. efferent fibers from alar p1 and p3 populations entered the basal plate of the diencephalon along topologically dorsoventral courses, bifurcating thereafter into longitudinal ascending (rostral) and des ... | 1999 | 10342444 |
| power spectral analysis of short-term rr interval and arterial blood pressure oscillations in the lizard, gallotia galloti: effects of sympathetic blockade. | the role of the sympathetic limb of the autonomic nervous system (ans) in the mediation of oscillations in consecutive beat-to-beat rr interval (rri) and systolic blood pressure (sbp) values of lizards, gallotia galloti, was investigated using spectral analysis and measuring effects of autonomic blockers. alpha-adrenergic blockade decreased the power spectral density (psd) of both rri and sbp very low frequency (vlf: 0.007-0.055 hz) and low frequency (lf: 0.055-0.150 hz) bands, whereas beta-adre ... | 1999 | 9919685 |
| distribution of neurofilaments in the telencephalon and mesencephalon of the adult and developing gallotia galloti lizard. | the location and chronology during development of the immunoreactivity due to the presence of neurofilaments (nf) in telencephalon and mesencephalon of the lizard gallotia galloti has been studied. for this purpose we have used two antibodies recognizing both phosphorylated and non phosphorylated neurofilaments (nf), a polyclonal ab (nf 005), and a commercial monoclonal antibody (nf-200). the study was completed by using the bielschowsky technique. during ontogeny, the anti-nf 005 immunoreactivi ... | 1998 | 9857247 |
| heterogeneous immunoreactivity of glial cells in the mesencephalon of a lizard: a double labeling immunohistochemical study. | astrocytes and radial glia coexist in the adult mesencephalon of the lizard gallotia galloti. radial glia and star-shaped astrocytes express glial fibrillary acidic protein (gfap) and glutamine synthetase (gs). the same cell markers are also expressed by round or pear-shaped cells that are therefore astrocytes with unusual morphology. other round or pear-shaped cells, also scattered in the tegmentum and the tectum, display only gs. electron microscopy reveals that these cells may be oligodendroc ... | 1998 | 9438971 |
| the use of dna divergence to help determine the correlates of evolution of morphological characters. | even though, from darwin onwards, interisland evolution has been a cornerstone of evolutionary theory it has not been possible to determine to what extent this geographic variation reflects the phylogeny (e.g., pattern of island colonization) or ecogenetic adaptation to different ecological conditions on each island. using the morphology of western canary island lacertids (gallotia galloti) as an example, a procedure is explored that gives a preliminary answer to this problem when there are a li ... | 1996 | 28568945 |
| development of catecholamine systems in the brain of the lizard gallotia galloti. | for a better insight into general and derived traits of developmental aspects of catecholaminergic (ca) systems in amniotes, we have studied the development of these systems in the brain of a lizard, gallotia galloti, with tyrosine hydroxylase (th)- and dopamine (da) immunohistochemical techniques. two main groups of th-immunoreactive (thi) perikarya appear very early in development: one group in the midbrain which gives rise to the future ventral tegmental area, substantia nigra and retrorubral ... | 1994 | 7860800 |
| dna evolution and colonization sequence of island lizards in relation to geological history: mtdna rflp, cytochrome b, cytochrome oxidase, 12s rrna sequence, and nuclear rapd analysis. | a novel source of nuclear dna information from random amplified polymorphisms (rapd) and a wide-range mitochondrial dna information (cytochrome b, cytochrome oxidase, and 12s rrna sequence, rflp from 4-base and 6-base recognition endonucleases) are used to reconstruct the population phylogeny of the western canary island lizard, gallotia galloti, which, for geological reasons, has been subject to dispersal but not vicariance. interpretation of dna phylogenies in terms of colonization sequence in ... | 1994 | 28568298 |
| reptilian waking eeg: slow waves, spindles and evoked potentials. | signal spectral analysis procedures were used to compute the power spectrum of gallotia galloti lizards eeg at different (5-35 degrees c) body temperatures. eeg power spectra were mainly characterized by a low frequency peak between 0.5 and 4 hz which was present at the different body temperatures. a second spectral peak, corresponding to spindles of similar pattern to the sleep spindles of mammals, also appears in the spectra. the peak frequency of the spindles increased with the body temperatu ... | 1994 | 7512911 |
| effects of barium chloride on electrolyte transport across isolated colons from normal and aldosterone-treated lizards (gallotia galloti) | addition of bacl2 to the solution bathing colons of normal lizards did not alter the absorptive na+ flux, but did reverse the net absorption of cl- to become net secretion. cl- secretion resulted from an increase in its serosal-to-mucosal movement and was positively correlated to an increase in short-circuit current. ba2+-induced short-circuit current was dependent on the presence of both na+ and cl- in the serosal medium. ba2+-induced cl- secretion could be reversed by serosal amiloride (10(&sh ... | 1994 | 9317233 |
| distribution of neuropeptide y-like immunoreactivity in the brain of the lizard gallotia galloti. | the distribution of neuropeptide y (npy)-like immunoreactivity was studied in the brain of the lizard gallotia galloti, in order to gain insight into the comparative topography of this peptide. antisera against both npy and its c-terminal flanking peptide (c-pon) were used, demonstrating a general coexistence of both peptides, as described in other vertebrates. most npy-like immunoreactive (npy-li) cell bodies were observed in the telencephalon, specifically in various olfactory structures, all ... | 1992 | 1602050 |
| in vitro hrp-labeling of the fasciculus retroflexus in the lizard gallotia galloti. | in order to test the usefulness of the in vitro hrp-labeling technique in the brains of small lizards, the fasciculus retroflexus was labeled in isolated brains of young specimens of the lizard gallotia galloti by means of hrp applied with the tip of a micropipette located approximately midway along the descending course of the tract. cells in the medial and lateral habenular nuclei were labeled retrogradely. anterograde transport showed the course of the fasciculus retroflexus, first dorsoventr ... | 1992 | 1498652 |
| myelin and myelinization in the telencephalon and mesencephalon of the lizard gallotia galloti as revealed by the immunohistochemical localization of myelin basic protein. | we have studied in the telencephalon and mesencephalon of the lizard gallotia galloti the localization and the chronology of appearance of the immunoreactivity due to the presence of a myelin-specific protein: the myelin basic protein (mbp). mbp-like immunoreactivity was present with different degrees of intensity in many nerve fibers (isolated, in tracts and in commissurae) and it was apparently more abundant in mesencephalon. during ontogeny the earliest mbp-like immunoreactivity was detected ... | 1992 | 1373587 |
| presence of substance p and angiotensin ii in corticotropic cells of the lizard gallotia galloti: immunochemical study in the adult and during ontogenesis. | the hypophysis of the lizard gallotia galloti showed substance-p-like immunoreactivity in both the adenohypophysis (pars distalis, pd; pars intermedia, pi) and the neurohypophysis (median eminence and pars nervosa), whereas angiotensin-ii-like immunoreactivity appeared only in pd and pi. the elution-restaining procedure has allowed us to demonstrate the colocalization of both peptides with adrenocorticotropic hormone (acth) in pd and pi cells. electron microscopic study revealed the presence of ... | 1991 | 1715056 |
| an ultrastructural study of ependymal cell differentiation during lizard (gallotia galloti) midbrain development. | ependymal cell differentiation was examined in the lizard gallotia galloti from e31 to adult. from e31 to e34 only one type of cell could be identified making up the pseudostratified columnar neuroepithelium but by e35 to e37 three types of ependymal cell were present. the first type was a narrow, elongated, columnar cell containing rough endoplasmic reticulum filled with an amorphous ground substance similar to that of astrocytes. the second type was broader with the nucleus close to the ventri ... | 1991 | 2032939 |
| ontogeny and immunohistochemical differentiation of the pars tuberalis in the lizard gallotia gallotti. | the development of the pituitary pars tuberalis (pt) was studied in the lizard gallotia galloti using classical, histological and immunohistochemical techniques. as early as stage 32 of development, the rathke's pouch exhibits 2 lateral extensions that will give rise to the pt. in these extensions, cellular proliferation results in the formation of two cell masses which develop rostro-laterally and contact the basal diencephalon at stage 35. at stage 37, these two cell groups lose their connecti ... | 1991 | 1821421 |
| early neuronal development in the spinal cord of a reptile assessed by neurofilament protein immunoreactivity. | the neural tube in the gallotia galloti stage 22 (s.22) embryo is already closed at the level of the cervical flexure, while caudal closure does not end until s.23. cell proliferation begins shortly after the final neural tube closure, being rapid and giving rise, by s.26, to a thick ventricular zone. cell migration does not start until s.28, initially in the basal plate, and forming putative motoneurons. migration in the alar plate does not start until s.33. the appearance of the first neurofil ... | 1990 | 2074217 |
| neuropeptide tyrosine (npy) and its c-terminal flanking peptide (c-pon) in the developing and adult spinal cord of a reptile. | the developmental pattern and the adult distribution of neuropeptide tyrosine (npy) and its c-terminal flanking peptide (c-pon) were investigated in the spinal cord of the lizard gallotia galloti. embryonic, postnatal and adult animals were studied by means of the immunohistochemical technique. neurons containing both peptide immunoreactivities first appeared at the embryonic stages 37/38. immunoreactive perikarya were more numerous in the embryonic than in either the postnatal or the adult spin ... | 1990 | 2272899 |
| an ultrastructural study of the development of astrocytes in the midbrain of the lizard. | astrocyte development was investigated electron microscopically in the midbrain of the lizard gallotia galloti from e32 to adult. at e32 only very immature (early) glioblasts were present in the midbrain and similar cells could be found until hatching. from e34 two other types of glioblast could be identified--dark glioblasts which had a slightly greater amount of cytoplasm than early glioblasts and light glioblasts, in which cytoplasmic organelles were more abundant. both dark and light gliobla ... | 1990 | 2254168 |
| glial fibrillary acidic protein and vimentin immunohistochemistry in the developing and adult midbrain of the lizard gallotia galloti. | the distribution of glial fibrillary acidic protein (gfap)- and vimentin-containing cells was studied by immunohistochemistry in the midbrain of the lizard gallotia galloti. at embryonic stage 32 (e32), vimentin immunoreactivity appeared first in cell bodies located in the ventricular walls, in radial fibers, and subpial end-feet and increased in these structures until e34/e35. faint gfap immunoreactivity gradually appeared in the same structures between e34 and e37, and this increased until adu ... | 1990 | 2358522 |
| radial glia and astrocytes in developing and adult telencephalon of the lizard gallotia galloti as revealed by immunohistochemistry with anti-gfap and anti-vimentin antibodies. | the development of radial glia and astrocytes in the telencephalon of the lizard gallotia galloti was studied by immunohistochemistry with anti-vimentin and anti-gfap antibodies. vimentin appears at embryonic stage 32 (e32) in the proliferative zone of the lateral ventricle and subpial end-feet in the marginal zone. at e34-35 the staining intensity for vimentin in all radial glia is maximal. it then decreases and disappears in most structures in adult animals. gfap appears at e35 in the end-feet ... | 1990 | 2358521 |
| stereotaxic atlas for the lizard gallotia galloti. | | 1990 | 2181532 |
| development of the ventral striatum in the lizard gallotia galloti. | the ventral striatum nucleus (vs) begins development at stage 31 (e. 31) from the neuroblasts which proceed from the cellular proliferation of both the ventral and terminal sulci. the ultrastructural features of the neuroblasts of vs between e. 31 and e. 34 have the aspect of immature cells, but as from e. 38 neuronal maturity is gradual until hatching. at e. 34 cellular death occurs. the first degenerated cells belong to type i (nuclear degeneration) of the pycnotic cells; as from e. 40 cytopla ... | 1989 | 2606798 |
| electrical stimulation of lateral hypothalamic area and behavioural sequences in a lacertid lizard. | the observed transition frequencies of behaviour patterns were obtained for isolated lizards (gallotia galloti), as well as those expected if the patterns were independent. the transitions differing significantly from random were calculated when: (1) the animals had an electrode in their lateral hypothalamic area (i); (2) they were electrically stimulated (s). the index o-e (o = observed transition frequency; e = expected one) was used to extract the statistical significance of the behaviour tra ... | 1989 | 2923662 |
| immunohistochemical study on the development of the adenohypophysial cells in the lizard gallotia galloti. | immunohistochemical methods have been used to study the embryonic and postnatal development of the hormone-producing cells in the adenohypophysis of the lizard gallotia galloti. in this species, rathke's pouch is formed between stages 30 to 32 of the embryonic development, although the first sign of immunoreactivity to antisera against adenohypophysial hormones occurs in stage 33 in the pars distalis anlage. these cells derive from the dorsal face of rathke's pouch and are immunoreactive to anti ... | 1989 | 2552864 |
| neuronal typology of gallotia galloti optic tectum. | the object of this work has been to show neuronal typology and stratification of the optic tectum in gallotia galloti adult specimens so as to have a basic model for the neuronal genesis study. as methodology nissl and golgi-stensaas technique were employed. six strata have been identified that include 14 layers where the neuronal types can be included, poligonals, bipolar, monopolar and stellate types. the stratification of the optic tectum in the 14 layers is corroborated in reptiles, a fact w ... | 1989 | 2471730 |
| electrical properties and fluxes of na+ and cl- across lizard intestine. | electrical parameters and unidirectional na+ and cl- fluxes were determined in vitro across the duodenum, ileum and colon of lizard (gallotia galloti). electrical potential difference (pd) and short circuit current (isc) were low in the three segments studied, whilst tissue conductance (gt) was high. a net active transport of na+ and cl- was observed in the three segments. net na+ absorption was higher across duodenum and ileum than across the colon, while net cl- absorption was similar in duode ... | 1988 | 3244892 |
| the prophylactic effect of diphenylhidantoin in the kindling effect on reptiles (gallotia galloti). | 1. lizards gallotia galloti received daily 3 mg/kg body wt of diphenylhidantoin (dph) over a period of 15 days and at the same time the animals were kindled. 2. the progression of the kindling effect was evaluated by counting the number of spontaneous epileptiform potentials, the duration of afterdischarges and the duration of electroencephalographic spontaneous seizures. 3. the diphenylhidantoin treated group, relative to controls presented: (a) significant reduction in the duration of afterdis ... | 1988 | 2904860 |
| the role of aldosterone in water and electrolyte transport across the colonic epithelium of the lizard, gallotia galloti. | 1. the effects of d-aldosterone on the electrical properties and ionic transport have been analysed (in vitro) in the colonic epithelium of the lizard, gallotia galloti. 2. the injection of 30 g of d-aldosterone induced a significant rise of plasma aldosterone concentration, sustained for 4 hr after administration. 3. intraperitoneal injections of d-aldosterone caused a slight reduction of transmural potential difference (pd) and short-circuit current (isc). 4. net absorption of na+ across the c ... | 1988 | 2904335 |
| cell death in the lizard cerebellar anlage at early embryonic stages. | three types of cell degeneration were observed at early embryonic stages of the development of cerebellar cortex of gallotia galloti (reptilia: lacertidae). one is characterized by overall cell shrinkage whereas in the other two the degenerative process is recognized by a differential appearance of the cellular nucleus. we have also studied the further phagocytosis of the resultant cellular debris. | 1987 | 3612886 |
| geographic variation within an island: univariate and multivariate contouring of scalation, size, and shape of the lizard gallotia galloti. | microgeographic variation of the vegetarian lizard gallotia galloti within the island of tenerife is described using univariate analysis, correlation, multiple group principal component analysis, canonical analysis, transects, and contours. the size varies locally in a mosaic pattern while head shape shows a wnw-ese cline in the south. the scalation (scale and femoral pore counts) has two facets to its geographic variation, both of which are incongruent with the primary variation in the size and ... | 1987 | 28568755 |
| [effect of interstimulus interval on the kindling effect in reptiles (gallotia galloti)]. | | 2006 | 3606309 |
| cell death in the embryonic brain of gallotia galloti (reptilia; lacertidae): a structural and ultrastructural study. | in the striatum, thalamus and cerebellum of a lacertid reptile, we have found three types of cellular death during embryonic development, both at the light and electron microscopic level. the first affects the undifferentiated neuro-epithelial cells and is commonest during the early stages (e. 32-e. 36). the second corresponds to the type of 'nuclear' death described in the bibliography and reaches a maximum in the middle embryonic period (e. 37-e. 39); nevertheless important variations were obs ... | 1987 | 3654326 |
| cell death in the normal development of gallotia galloti mesencephalon (reptilia lacertidae). an ultrastructural study. | we have studied the development of the mesencephalon of gallotia galloti and we have observed two classes of cellular death: 'nuclear' or 'type i' and 'cytoplasmatic' or 'type ii'. the first appears in stages around e-34 and the second one is observed from stages around hatching to the adult lizard. the degenerative cells have been observed in the profundus, torus semicircularis, the 5th pair of the trigeminal nerve nuclei as well as the 4th and 5th layers of the optic tectum where this last nuc ... | 1987 | 3560296 |
| effect of body temperature on the ventilatory responses in the lizard gallotia galloti. | a new technique for recording ventilatory frequency on small lizards is described. this is based on the record of the electrical potential difference that spontaneously arises during the ventilatory cycle between an active stainless steel needle electrode, implanted on the membrane of the nasal cavity, and a reference stainless steel screw electrode implanted on the parietal bone. the nasal ventilatory signal coming from these electrodes, together with a simultaneous record of the electromyogram ... | 1986 | 3749639 |
| neuronal cilia in the embryonic thalamus and striatum of gallotia galloti (reptilia, lacertidae). | cilia are a common characteristic of the embryonic neurons of the thalamus and striated centers of gallotia galloti from e.35. the ciliogenesis process occurs around the stages e.33 and e.34. the ciliary morphology shows no substantial variations between the different stages and the ciliary structure in the embryonic period is 8 + 1. on the other hand, the adult cilia has a 9 + 2 arrangement of microtubules. we do not rule out the possibility of other axonemes. | 1986 | 3571964 |
| a nissl, golgi-kopsch and ultrastructural study of the gallotia galloti red nucleus. | the object of this study was to understand the different types of morphological neurons of the gallotia galloti red nucleus using quantitative and qualitative analysis, under the aspects of optical (nissl and golgi-kopsch) and electronic microscopy. the results from this study and considering the size, the distribution of nissl bodies and the dendritic arborization, we have identified three neuronal types: ellipsoidal or ovoid (15 microns), triangular (15-35 microns) and polygonal (20-50 microns ... | 1986 | 2423585 |
| reproductive success of the canarian echium simplex (boraginaceae) mediated by vertebrates and insects. | oceanic island ecosystems favour the appearance of novel interactions as a consequence of their depauperate and disharmonic flora and fauna. we investigated echium simplex, endemic to the anaga biosphere reserve in ne tenerife, canary islands, belongs to the canarian bird-flower element. along two flowering seasons, we studied the breeding system of e. simplex, identified the floral visitors and compared the pollination effectiveness of different animal guilds (insects versus vertebrates) by mea ... | 2019 | 30334319 |
| geographic patterns of stress in insular lizards reveal anthropogenic and climatic signatures. | anthropization of insular ecosystems may have negative impacts on native populations of lizards, which provide core ecosystem services on islands. we aimed to identify environmental factors to explain the interlocal variation in faecal glucocorticoids, parasite intensity, and body condition in populations of insular lizards. a cross-sectional design during the summer of 2017 and 2018 was used to sample 611 adult lizards, gallotia galloti. interlocal variation of three stress indicators was analy ... | 2020 | 32836132 |
| glial cells in the lizard gallotia galloti subpallial nuclei during ontogeny: an ultrastructural study. | | 1997 | 29852622 |