| 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 |
| population structure and allometry of podocnemis unifilis (testudines, podocnemididae) in a protected area upstream belo monte dam in xingu river, brazil. | amazon river turtles are increasingly threatened by habitat loss and alteration due to the brazilian energy policy based on construction of hydroelectric dams, meanwhile, populational studies remain scarce. we described the population structure, and established body allometric relationships of podocnemis unifilis in the terra do meio ecological station in the iriri river, tributary of the xingu river upstream the belo monte dam under construction turtles were captured by hand net and diving in 2 ... | 2015 | 26628030 |
| mercury concentration in different tissues of podocnemis unifilis (troschel, 1848) (podocnemididae: testudines) from the lower xingu river - amazonian, brazil. | studies using chelonians as biosentinels of environment quality or health risks associated with turtle consumption are very rare, especially in the amazon basin. this study aims to measure mercury levels (hg) in muscle, liver, fat and blood of podocnemis unifilis from the lower xingu river, assessing the possible difference in concentration between sexes and also evaluating the potential bioaccumulation along different body sizes. samples were collected during the dry season (october 2012) and m ... | 2015 | 26691083 |
| 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 |
| 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 |