| mercury levels in muscle of six species of turtles eaten by people along the rio negro of the amazon basin. | mercury levels in the amazon river are generally high, but there are no published studies on hg levels in turtles from the region. in this study, levels of hg were examined in the muscle of six species of turtles in the rio negro in the amazon basin of brazil, including podocnemis unifilis, podocnemis expansa, podocnemis erythrocephala, podocnemis sextuberculata, peltocephalus dumerilianus, and chelus fimbriatus. it is important to analyze hg levels in chelonians in this region because of the po ... | 2010 | 19621205 |
| nest placement of the giant amazon river turtle, podocnemis expansa, in the araguaia river, goiás state, brazil. | the giant amazon river turtle (podocnemis expansa) nests on extensive sand bars on the margins and interior of the channel during the dry season. the high concentration of nests in specific points of certain beaches indicates that the selection of nest placement is not random but is related to some geological aspects, such as bar margin inclination and presence of a high, sandy platform. the presence of access channels to high platform points or ramp morphology are decisive factors in the choice ... | 2005 | 16042279 |
| association of acepromazine with propofol in giant amazon turtles podocnemis expansa reared in captivity. | to evaluate the effects of different concentrations of an anesthetic association in giant amazon turtles (podocnemis expansa). | 2012 | 22850706 |
| polyandrous behavior in an overexploited giant south american turtle (podocnemis expansa) population in central amazon, brazil. | the aim of the present study was to investigate the reproductive behavior of the giant amazon river turtle (podocnemis expansa) in the amazon. this was carried out by estimating the degree of polymorphism in five dna microsatellites in a sample of 359 hatchlings from 12 nests in the mamirauá sustainable development reserve in the municipality of tefé, state of amazonas, brazil. an analysis of allele frequency and variation in the five microsatellite loci allowed for determination of multiple pat ... | 2017 | 28218789 |
| parasitization by sauroplasma sp. (apicomplexa: haemohormidiidae) in chelonian podocnemis expansa (testudines: podocnemididae) in the brazilian amazon. | the prevalence and parasitemia of the piroplasm sauroplasma sp. were evaluated in the amazon chelonian podocnemis expansa in brazil. samples were collected from 75 chelonians from 3 locations, including a commercial breeding facility, an indigenous subsistence breeding facility, and a wild population. sauroplasma were found in 72% (54/75) of the chelonians, and the prevalence varied among the sampling sites. no significant correlations were found between the prevalence and the sex and body condi ... | 2016 | 26561340 |
| nesting ecology of podocnemis expansa (schweigger, 1812) and podocnemis unifilis (troschel, 1848) (testudines, podocnemididae) in the javaés river, brazil. | nest site has influence on incubation duration and hatching success of two neotropical turtles, the giant amazon river turtle (podocnemis expansa) and yellow-spotted side-neck turtle (podocnemis unifilis--'tracajá'). the 2000 and 2001 nesting seasons have been monitored at the javaés river in bananal island, brazil. although they nest on the same beaches, there is a separation of the nesting areas of p unifilis and p. expansa nests on the upper parts of the beach. the incubation duration for p. ... | 2010 | 20231963 |
| the use of rocuronium in giant amazon turtle podocnemis expansa (schweigger, 1812) (testudines, podocnemididae). | to determine whether rocuronium would provide safe, short-term immobilization in podocnemis expansa. | 2009 | 19705031 |
| mercury concentrations in different tissues of turtle and caiman species from the rio purus, amazonas, brazil. | total mercury (hg) concentrations of muscle, liver, blood, and epidermal keratin were measured in typically consumed, economically and culturally important species of turtle (podocnemis unifilis and podocnemis expansa) and caiman (melanosuchus niger and caiman crocodilus) from the rio purus in the amazon basin, brazil. methylmercury (mehg) concentrations were also measured in muscle tissue, representing the first analysis of mehg concentrations in amazonian reptile species. in muscle tissues hg ... | 2015 | 26387493 |
| morphology and molecular phylogeny of a new myxidium species (cnidaria: myxosporea) infecting the farmed turtle podocnemis expansa (testudines: podocnemididae) in the brazilian amazon. | this study reports, for the first time, a myxosporan species of the genus myxidium in a neotropical turtle. myxidium turturibus n. sp., was found in the gall bladder of podocnemis expansa (testudines: podocnemididae) farmed in brazilian amazon. numerous disporic pseudoplasmodia in different developmental stages, and mature spores were free in the bile. mature myxospores were fusiform, slightly arcuate in valval view, measuring 13.6±0.4 (13.1-15.1) μm in length and 4.1±0.3 (3.4-4.6) μm in width. ... | 2017 | 27693559 |