| a survey of hemoparasite infections in free-ranging mammals and reptiles in french guiana. | blood smears of 1,353 free-ranging mammals (35 species) and 112 reptiles (31 species) from french guiana were examined for hemoparasites. parasites from 3 major groups were recorded: apicomplexa (including hemogregarines, piroplasms, and plasmodium spp.), trypanosomatidae, and filaroidea. fifty percent of the individuals (86% of the species) were infected by parasites from at least 1 group. hemogregarines, identified as hepatozoon sp., infected numerous snakes with high prevalences (30-100%); in ... | 2000 | 11128476 |
| ecological relationships of meso-scale distribution in 25 neotropical vertebrate species. | vertebrates are a vital ecological component of amazon forest biodiversity. although vertebrates are a functionally important part of various ecosystem services they continue to be threatened by anthropogenic impacts throughout the amazon. here we use a standardized, regularly spaced arrangement of camera traps within 25km2 to provide a baseline assessment of vertebrate species diversity in a sustainable use protected area in the eastern brazilian amazon. we examined seasonal differences in the ... | 2015 | 25938582 |
| water availability not fruitfall modulates the dry season distribution of frugivorous terrestrial vertebrates in a lowland amazon forest. | terrestrial vertebrate frugivores constitute one of the major guilds in tropical forests. previous studies show that the meso-scale distribution of this group is only weakly explained by variables such as altitude and tree basal area in lowland amazon forests. for the first time we test whether seasonally limiting resources (water and fallen fruit) affect the dry season distribution in 25 species of terrestrial vertebrates. to examine the effects of the spatial availability of fruit and water on ... | 2017 | 28301589 |
| can forest fragmentation disrupt a conditional mutualism? a case from central amazon. | this is the first study to investigate whether scatter-hoarding behavior, a conditional mutualism, can be disrupted by forest fragmentation. we examined whether acouchies (myoprocta acouchy, rodentia) and agoutis (dasyprocta leporina, rodentia) changed scatter-hoarding behavior toward seeds of astrocaryum aculeatum (arecaceae) as a consequence of a decrease in forest-patch area. our study was conducted at the 30-year-old biological dynamics of forest fragments project, in central amazon, brazil. ... | 2009 | 19633870 |
| comparative study on the forefoot and hindfoot intrinsic muscles of some cavioidea rodents (mammalia, rodentia). | the present study compares the forefoot and hindfoot musculature of five representative species of cavioidea rodents. in all species, the musculature of both forefeet and hindfeet have the same array regardless of the absence of digit i in the manus of hydrochaeris hydrochaeris and cavia porcellus. our results suggest a tendency in these species towards a three-digit system, with a functional loss of digit v and a predominance of digit iii in their forefeet. in the same way, the muscular reducti ... | 2007 | 17008077 |