| establishment of the tortoise tick amblyomma marmoreum (acari: ixodidae) on a reptile-breeding facility in florida. | the tortoise tick amblyomma marmoreum koch was found to be established on a reptile facility in central florida. over a 5-mo period, 443 ticks were collected from tortoises, dogs, and vegetation. collections from hosts were primarily from 3 species of exotic tortoises, including leopard tortoises, aldabra tortoises, and yellow-footed tortoises. the total numbers of ticks present, the presence of all life stages, and the slow development of this species indicate that this is not a recent infestat ... | 1998 | 9775582 |
| hemoglobin-sulfhydryls from tortoise (geochelone carbonaria) can reduce oxidative damage induced by organic hydroperoxide in erythrocyte membrane. | sulfhydryl groups are important to avoid oxidative damage to the cell. in rbc, tert-butyl hydroperoxide (tert-booh) and hydrogen peroxide (h2o2) are capable of oxidizing heme and promoting lipid peroxidation. h2o2 caused greater oxidation of heme than tert-booh, although the oxidation of sulfhydryl groups was similar. geochelone carbonaria hb, a rich sulfhydryl protein, inhibited the tba-reactive substances formation of human erythrocytes exposed to tert-booh by about 30%; this decrease was smal ... | 2000 | 11026669 |
| description of eimeria motelo sp. n. (apicomplexa: eimeriidae) from the yellow footed tortoise, geochelone denticulata (chelonia: testudinidae), and replacement of eimeria carinii lainson, costa & shaw, 1990 by eimeria lainsoni nom. nov. | eimeria motelo sp. n. is described from faeces of the yellow-footed tortoise, geochelone denticulata (l.). oocysts are irregularly ellipsoidal or cylindrical, with slightly expressed lobed protrusions and irregularities at the poles, possibly caused by wrinkling of the oocyst wall, 17 (15-19) x 9.4 (8.5-11) microm, shape index (length/width) being 1.81 (1.45-2). the oocyst wall is smooth, single-layered, 0.5 microm thick with no micropyle. there are no polar bodies. sporocysts are ellipsoidal, 8 ... | 2000 | 11080768 |
| notes on parasitism by amblyomma humerale (acari: ixodidae) in the state of rondônia, western amazon, brazil. | the tick amblyomma humerale koch is endemic to south america. all host records refer to the adult stage parasitizing tortoises, mostly yellow-footed tortoise, geochelone denticulata (l.), and red-footed tortoise, geochelone carbonaria (spix). the current study reports the presence of a. humerale in the state of rondônia, brazil. a total of 215 adult ticks (201 males, 14 females) was collected from six g denticulata in an indian reserve and nine geochelone sp. in rural monte negro county, giving ... | 2002 | 12495177 |
| molecular characterization of hemoglobin alpha-d chains from geochelone carbonaria and geochelone denticulata land turtles. | in order to help elucidate the evolution of alpha-globins, the complete cdna and amino acid sequences of geochelone carbonaria and geochelone denticulata land turtles alpha-d chains have been described. in g. carbonaria, the cdna is 539 bp with atg start codon located at position 46, tga stop codon at position 469 and aataaa polyadenylation signal at position 520. in g. denticulata, the cdna is 536 bp with atg start codon located at position 46, tga stop codon at position 469 and aataaa polyaden ... | 2003 | 12568815 |
| ticks on captive and free-living wild animals in northeastern brazil. | from 2005 to 2009, 147 ticks found on 32 wild animals from or referred to two zoobotanical parks (parque zoobotânico arruda câmara and parque estadual dois irmãos) located in northeastern brazil were identified. ticks found on two veterinarians working in one of the parks (i.e., parque estadual dois irmãos), after return from forested areas within the park's territory, were also identified. the following tick-host associations were recorded: amblyomma fuscum neumann on boa constrictor l.; amblyo ... | 2010 | 19693679 |
| new tick records in rondônia, western brazilian amazon. | in the present study, we provide new tick records from vilhena municipality, in the southeast of the state of rondônia, northern brazil. ticks collected from a capybara, hydrochoerus hydrochaeris (linnaeus), were identified as amblyomma romitii tonelli-rondelli (1 female), and amblyomma sp. (1 larva). ticks collected from a harpy eagle, harpia harpyja (linnaeus), were identified as amblyomma cajennense (fabricius) (16 nymphs) and haemaphysalis juxtakochi cooley (1 nymph). ticks collected from a ... | 2010 | 20943027 |
| anti-inflammatory activity of animal oils from the peruvian amazon. | animal oils and fats from the fishes electrophorus electricus and potamotrygon motoro, the reptiles boa constrictor, chelonoidis denticulata (geochelone denticulata) and melanosuchus niger and the riverine dolphin inia geoffrensis are used as anti-inflammatory agents in the peruvian amazon. the aim of the study was to assess the topic anti-inflammatory effect of the oils/fats as well as to evaluate its antimicrobial activity and fatty acid composition. | 2014 | 25150527 |
| thesis abstract morphological and phylogeographic analysis of brazilian tortoises (testudinidae). | the discriminative potentials of biogeography, vocalization, morphology, cytogenetics, hemoglobin, and molecular profiling of cytochrome b as taxonomic techniques for differentiating brazilian tortoises were evaluated in this study. in brazil, two species of tortoises are described, chelonoidis carbonarius and chelonoidis denticulatus. however, in the present study, some animals that were initially recognized based on morphological characters and coloring did not correspond to the typical patter ... | 2015 | 26782509 |
| a polygraphic study of the tortoise (testudo denticulata). absence of electrophysiological signs of sleep. | | 1973 | 4802025 |
| are tortoises important seed dispersers in amazonian forests? | according to most studies on seed dispersal in tropical forests, mammals and birds are considered the main dispersal agents and the role played by other animal groups remains poorly explored. we investigate qualitative and quantitative components of the role played by the tortoise chelonoidis denticulata in seed dispersal in southeastern amazon, and the influence of seasonal variation in tortoise movement patterns on resulting seed shadows. seed shadows produced by this tortoise were estimated b ... | 2009 | 19575239 |
| new species of eimeria and isospora (protozoa: eimeriidae) in geochelone spp. (chelonia: testudinidae) from amazonian brazil. | tetrasporocystic, dizoic oocysts of reptiles have been separated by some authors into the genera eimeria, choleoeimeria and acroeimeria (protozoa: eimeriidae), based on the site and mode of development of their endogenous stages. the majority of eimeria species have been, and still are, however, described on oocyst morphology alone. four different oocysts with this basic morphology were encountered in the faeces of brazilian tortoises, geochelone carbonaria spix, 1824 and are assigned to the gen ... | 2008 | 19202760 |
| functional behavior of tortoise hemoglobin geochelone denticulata. | the hemolysate from geochelone denticulata contains two main hemoglobin components, as shown by ion exchange chromatography and polyacrylamide gel electrophoresis (page). electrophoresis under dissociating conditions showed three types of globin chains. the apparent molecular mass, as determined by gel filtration on sephadex g-200, was compatible with tetrameric hb, which was unable to polymerize. the g. denticulata hb has a p50 value of 9.56 mm hg at ph 7.4. the hb oxygenation appears to be und ... | 2002 | 12659022 |
| sulphydryl groups and their relation to the antioxidant enzymes of chelonian red blood cells. | thiol groups of hemoglobin and blood glutathione are higher in geochelone carbonaria than in geochelone denticulata. exposure of stripped hemolysate of both tortoises to terc-butyl hydroperoxide, resulted in a higher ferroheme oxidation of g. denticulata hemoglobin. in this example glutathione reductase and glutathione peroxidase, were not active due to the absence of gsh and nadph, suggesting that the thiol groups of g. carbonaria hemoglobin act as antioxidant, similar to gsh. in the total hemo ... | 1998 | 9784849 |
| haemoproteus (apicomplexa: haemoproteidae) of tortoises and turtles. | it is the general opinion that the haemoproteid blood parasites of chelonians belong to the genus haemoproteus. different specific names have long been assigned to this parasite in birds, but some past authorities have accepted only a single species, h. metchnikovi, for all those haemoproteids recorded in a wide range of chelonian genera throughout the world. in the present study, a comparison of one such organism in the tortoise geochelone denticulata with another in the river turtle peltocepha ... | 1998 | 9675908 |
| detection of intranuclear coccidiosis in tortoises in europe and china. | intranuclear coccidiosis of tortoises (tinc) has been described in association with systemic disease in various species of tortoises. tinc has been detected in numerous tortoises from the united states, but there are only a few reports from tropical tortoises in germany and no reports from asia. using a real-time polymerase chain reaction assay, samples from 1,011 tortoises were screened for the presence of tinc. samples originated from animals kept in captivity in europe and in china. coccidia ... | 2017 | 28749291 |
| prevalence of haemoproteus spp. (apicomplexa: haemoproteidae) in tortoises in brazil and its molecular phylogeny. | captive terrestrial tortoises of the species chelonoidis carbonaria (n = 17) and chelonoidis denticulata (n = 37) in the state of minas gerais, southeastern brazil, were examined for hematozoans by using a combination of microscopic and molecular methods. microscopic examination revealed young intra-erythrocytic forms in blood smears from both species of tortoises. the results of pcr, sequencing, and phylogenetic analysis indicated that these parasites belonged to the haemoproteus spp., whose ob ... | 2016 | 26358101 |
| morphological variations and sexual dimorphism in chelonoidis carbonaria (spix, 1824) and chelonoidis denticulata (linnaeus, 1766) (testudinidae). | chelonoidis dcarbonaria and c. denticulata are two tortoises which are widely distributed brazil. although they occur sympatrically in different areas, c. carbonaria prefers open areas, while c. denticulata chooses forest areas. significant morphological variations can be observed in these species due to the fact that they occupy a vast and environmentally diverse area. data on shell shape of captive individuals reveal important differences between the two species, mainly in the plastron scutes, ... | 2012 | 22437396 |
| flexibility of digestive responses in two generalist herbivores, the tortoises geochelone carbonaria and geochelone denticulata. | to test the prediction that digestive responses digestibility, intake and passage time-of generalist herbivores vary with different diets, feeding trials were conducted in venezuela with two sympatric tortoise species, geochelone carbonaria and g. denticulata. three single-species diets (two fruit, one foliage) were fed to both species. for a given diet, digestibility, mass-specific intake and passage time did not differ between the two tortoise species, nor did they vary by sex or body mass wit ... | 1989 | 28312576 |
| influence of body size, topography, food availability and tree-fall gaps on space use by yellow-footed tortoises (chelonoidis denticulatus) in central amazonia. | habitat selection and extension of the area used by a given species may vary during different phases of its life and are often determined by the distribution and availability of resources throughout the landscape, such as food, breeding sites, and shelters. in this study, we assessed the influence of body size on the areas used by 21 individuals of the yellow-footed tortoises (chelonoidis denticulatus) from january to june 2017 in a dense rain forest area in central amazonia. we also investigate ... | 2019 | 30794558 |
| enriching tortoises: assessing color preference. | environmental enrichment is a principle that is used to enhance the quality of care for nonhuman animals in captivity. to achieve this, it is necessary to understand the animal's needs. this study focused on color preference to provide food stimuli as a source of environmental enrichment for the tortoise, chelonoidis denticulata. during this study, the stimuli green-, blue-, yellow-, and red-colored bananas and plaster blocks were randomly offered to the tortoises. analysis of the data showed th ... | 2014 | 24911428 |
| tonometry in adult yellow-footed tortoises (geochelone denticulata). | to determine intraocular pressure (iop) in adult yellow-footed tortoises using applanation tonometry. | 2003 | 14641827 |