Abstract:The Fasciated Tiger-heron (Tigrisoma fasciatum) is considered endangered in Brazil and Argentina. Although this species has a large range in Central and South America, its records are scattered and scarce. We used a combination of searches in the scientific literature and new field records to provide an updated distributional range of this species. Searches for records and photos of T. fasciatum were conducted using online databases. We also conducted field surveys along the margins of the Araguari and Falsino rivers, in the National Forest of Amapá, a sustainable protected area in the eastern Brazilian Amazon. Our literature review provided a total of 25 new distributional records of T. fasciatum. During our river based surveys we recorded one individual of T. fasciatum, which represents an extension of 499 km from the nearest previously documented occurrence. We present these findings in an up to date distributional map of T. fasciatum and highlight the need of further studies in order to better understand the species distribution and ecology.

ABSTRACT. Richness and composition of vertebrates in active and inactive latrines of Pteronura brasiliensis (Carnivora, Mustelidae) in the Eastern Amazon, Brazil. This study aimed to evaluate the richness and composition of the medium and large sized vertebrates in active and inactive latrines of Giant otters [Pteronura brasiliensis (Gmelin, 1788)] in a Sustainable Use conservation unit in the Eastern Brazilian Amazon. The study was performed in 45 latrines along 230 km of the Falsino and Araguari rivers (0°55ʼN, 51°35ʼW) and from this total, 24 presented fresh feces of Giant otters while 21 presented only old feces. From July to November 2012 each latrine was continuously monitored with a camera trap set to operate for 24 hours. The effort resulted in 458.8 camera trap/days, with 247.5 camera trap/days in latrines with fresh feces and 211.3 camera trap/ days with old feces. From this effort we obtained photos from a total of 22 vertebrate species. Most species photographed at latrines were mammals (n = 13), followed by birds (n = 6) and reptiles (n = 3). The most frequently photographed species were paca [Cuniculus paca (Linnaeus, 1766), n = 21], ocelot [Leopardus pardalis (Linnaeus, 1758), n = 11], white-tipped dove (Leptotila verreauxi Bonaparte, 1855, n = 8), giant otter [Pteronura brasiliensis (Gmelin, 1788), n = 7], and tapir [Tapirus terrestris (Linnaeus, 1758), n = 6], that accounted for 55.8% of all records. Most records (69.5%) were obtained in latrines with fresh feces and the number of vertebrate species was greater (n = 19) than in latrines with old feces (n = 15). However, the dissimilarity between the vertebrate communities of latrines with fresh and old feces did not differ statistically. However, the mean visitation of vertebrates to latrines with fresh feces was slightly higher than with old feces, although this difference was only marginally significant. There was an increase in records of felids [Leopardus pardalis, Leopardus wiedii (Schinz, 1821), and Panthera onca (Linnaeus, 1758)] in latrines with old feces, but it was only marginally significant. Thus, the presence of fresh feces of giant otters seems to increase the records of vertebrates, being especially important for groups with similar trophic guild. KEYWORDS. Camera trap, interspecific interactions, food resource.RESUMO. O estudo objetivou avaliar a riqueza e composição de vertebrados de médio e grande porte em latrinas ativas e inativas de ariranhas [Pteronura brasiliensis (Gmelin, 1788)], em uma Unidade de Conservação de Uso Sustentável na Amazônia Oriental Brasileira. O estudo foi realizado em 45 latrinas ao longo de 230 km nos rios Falsino e Araguari (0°55'N, 51°35'W), sendo que desse total, 24 apresentaram fezes frescas e 21 fezes velhas de ariranhas. De julho a novembro de 2012, cada latrina foi monitorada com uma armadilha fotográfica programada para operar por 24 horas. O esforço de campo resultou em 458,8 armadilhas/dia, sendo 247,5 armadilhas/dia em latrinas com fezes frescas e 211,3 armadilhas/ dia com fezes velhas. Foram...