A5056826787- Wildlife Ecology and Conservation
- Fish biology, ecology, and behavior
- Primate Behavior and Ecology
- Marine animal studies overview
- Fish Ecology and Management Studies
- Amphibian and Reptile Biology
- Animal Ecology and Behavior Studies
- Ecology and Vegetation Dynamics Studies
- Wildlife-Road Interactions and Conservation
- Fish Biology and Ecology Studies
- Plant and animal studies
- Bat Biology and Ecology Studies
- Animal Vocal Communication and Behavior
- Digital Games and Media
- Fern and Epiphyte Biology
- Species Distribution and Climate Change
- Animal Behavior and Reproduction
- Parasite Biology and Host Interactions
- Botanical Research and Applications
- Evolutionary Psychology and Human Behavior
- Evolution and Paleontology Studies
- Aquaculture Nutrition and Growth
- Vector-borne infectious diseases
- Chemokine receptors and signaling
- Scarabaeidae Beetle Taxonomy and Biogeography
Instituto Federal Farroupilha
2016-2024
Instituto Chico Mendes de Conservação da Biodiversidade
2021
Amazon (United States)
2021
National Institute of Amazonian Research
2011-2020
Brazilian Agricultural Research Corporation
2011-2016
Universidade Federal do Rio Grande do Norte
2016
Advanced Research Projects Agency - Energy
2016
Universidade Federal de Mato Grosso do Sul
2009
Universidade do Vale do Rio dos Sinos
2006
Xenarthrans-anteaters, sloths, and armadillos-have essential functions for ecosystem maintenance, such as insect control nutrient cycling, playing key roles engineers. Because of habitat loss fragmentation, hunting pressure, conflicts with domestic dogs, these species have been threatened locally, regionally, or even across their full distribution ranges. The Neotropics harbor 21 armadillos, 10 anteaters, 6 sloths. Our data set includes the families Chlamyphoridae (13), Dasypodidae (7),...
Abstract As water along dirt roads in the Pantanal floodplains diminishes, aquatic fauna becomes restricted to shallow pools. At end of 2009 dry season, we filmed giant otters living pools predating on yacare caimans. Such predation has not been recorded inhabiting Pantanal. Individual captured sub-adult The did share prey, but conspecifics stole it after conflicts. Caiman could be related resource scarcity these marginal environments. Information diet and interactions endangered populations...
Giant otters (Pteronura brasiliensis) live in groups that seem to abandon their territories during the flooding season. We studied spatial ecology of giant otter dry and wet seasons Vermelho Miranda rivers Brazilian Pantanal. monitored visually or by radiotelemetry 10 monthly from June 2009 2011. estimated home-range size for all with following methods: linear river length, considering extreme locations each group, fixed kernel. For radiotracked groups, we also used k-LoCoh method. Spatial...
Abstract Mammalian carnivores are considered a key group in maintaining ecological health and can indicate potential integrity landscapes where they occur. Carnivores also hold high conservation value their habitat requirements guide management plans. The order Carnivora has 84 species from 8 families the Neotropical region: Canidae; Felidae; Mephitidae; Mustelidae; Otariidae; Phocidae; Procyonidae; Ursidae. Herein, we include published unpublished data on native terrestrial (Canidae;...
Abstract Giant otters live in social groups, consisting of a mating pair and one or two litters. Groups are territorial mark their territories often with scent‐marks. Our objectives were to evaluate the frequencies marking over‐marking according status individuals define different postures used during marking. We observed four totaling 25 (five alpha males, females, seven adult male eight juveniles) group size ranging between 13 individuals. The study was conducted July 2006 2007 Vermelho...
AbstractThe giant otter (Pteronura brasiliensis) is a social species that defends territories along water bodies. Although some researchers have visually monitored otters during long periods at night, no nocturnal activity of the has been recorded and are currently believed to be strictly diurnal. In this study, we present information about patterns groups in Brazilian Pantanal, using radio telemetry camera trap data. We captured, implanted transmitters in, three male from different Miranda...
The South American silver catfish (Rhamdia quelen) is a widely distributed species in Central and America areas east of the Andes between Venezuela northern parts Argentina. bottom dwelling occurs lakes reservoirs as well rivers. Between June 2000 December 2001, sixteen were tracked during fourteen 24-h cycles two-hour-intervals, with aim investigating daily movements habitat use. Covered distances varied 0 m/2 h 326 mean distance covered 2 was 25.6 m. activity individual 5.6 81.4 h....
Abstract: Circadian use of time is an important, but often neglected, part animal's niche. We compared the activity patterns Neotropical otter Lontra longicaudis in two different areas Brazil using camera traps placed at entrance holts. obtained 58 independent photos Atlantic Forest (273 trap-days) and 46 Pantanal (300 trap-days). observed kernel density probabilities on these (45.6% 14.1% overlap between 95% 50% isopleths respectively). plasticity behaviour with areas. In Pantanal, selected...
According to the "social intelligence hypothesis," species with complex social interactions have more sophisticated communication systems. Giant otters (Pteronura brasiliensis) live in groups interactions. It is likely that vocal of giant than previous studies suggest. The objectives current study were describe airborne repertoire Pantanal area Brazil, analyze call types within different behavioral contexts, and correlate complexity level sociability mustelids verify whether or not result...
Between July 2014 and April 2015, we conducted weekly inventories of the circadian activity patterns mammals in Passo Novo locality, municipality Alegrete, southern Brazil. The vegetation is comprised by a grassy-woody steppe (grassland). We used two camera traps alternately located on one four 1 km transects, each separated km. classified pattern species percentage photographic records taken daily period. identify Cuniculus paca individuals differences flank spots. then estimate density 1)...
Territoriality carries costs and benefits, which are commonly affected by the spatial temporal abundance predictability of food, intruder pressure. Giant otters (Pteronura brasiliensis) live in groups that defend territories along river channels during dry season using chemical signals, loud vocalizations agonistic encounters. However, little is known about territoriality giant rainy season, when leave their follow fish dispersing into flooded areas. The objective this study was to analyze...
The giant otter (Pteronura brasiliensis) is listed as vulnerable in Brazil, included Appendix I of CITES and classified endangered by the IUCN. In few viable populations persist outside Amazon basin Pantanal wetland. Furthermore, there limited information on distribution abundance existing populations. aim this study was to estimate otters wetland discuss conservation status population. From July 2000 November 2011 we conducted surveys throughout detect occurrence observations active dens...
Pteronura brasiliensis feeds mainly on fish and uses communal latrines for territorial marking. The aim of this study was to identify the vertebrate species associated with giant otters which use feces as a food resource. From December 2010 June 2011, we positioned camera traps in front 21 six different otter groups 24 h cycles monthly. We registered 29 at latrines. Latrines seem be used frequent resource some species. Studies diets should take into account possible changes relative...
Acoustic variation can convey identity information, facilitate social interactions among individuals and may be useful in identifying sex group affiliation of senders. Giant otters live highly cohesive groups with exclusive territories along water bodies defended by the entire means acoustic chemical signals. Snorts are harsh alarm calls, emitted threat contexts, which commonly elicit cohesion alert behaviour members group. The aim this study was to determine whether giant otter snorts have...
Abstract Cuniculus paca is considered locally threatened in some parts of its range mainly because hunting pressure and habitat loss. The species widely distributed South Central America. Agouti’s distribution Brazil broad, although there no information on occurrence the Northeast region western part Rio Grande do Sul state. presents a marginal northeastern Uruguay. Here, we describe 16 new records Pampa region, including state, Uruguay, expanding C. known distribution.
Lontra longicaudis, possui ampla distribuicao no Brasil, ocorrendo em quase todas as regioes onde os corpos d’agua sao propicios, como rios, riachos, lagoas e areas costeiras com disponibilidade de agua doce. Apesar disso, considerando-se que a taxa desmatamento Brasil e cerca 1% ao ano, estima-se um declinio populacional da especie aproximadamente 20% nos proximos 20 anos (3 geracoes). Associado isso, perdas decorrentes outros fatores abate por retaliacao conflito pesca piscicultura,...
Abstract Giant otters Pteronura brasiliensis are semiaquatic mammals that mainly eat fish, the abundance of which is affected by seasonal flooding and habitat structure. The piscivorous habits giant lead to negative human perception conflicts with fisheries. We compared otter feeding between seasons habitats in Southern Pantanal, Brazil, analyzing feces collected September 2008 June 2011.We investigated whether season P. diet composition prey size. calculated frequency occurrence, relative...
The giant otter (Pteronura brasiliensis) is a semiaquatic carnivore and top predator in the trophic chain, considered sentinel of freshwater ecosystems. Ticks are common ectoparasites worldwide distribution potential vectors diseases. In this study, we report ectoparasitism by ticks on carcass found during monitoring activity at Negro River, that holds viable population endangered species Brazilian Pantanal. A total three tick specimens were collected: two adults identified as Amblyomma...
Ariranhas, Pteronura brasiliensis , sao sociais, vivendo em grupos monogâmicos sob cooperacao reprodutiva, o que restringe tamanho populacional efetivo da especie aos casais dominantes. Individuos tornam-se maduros a partir de dois anos vida, sendo femeas na natureza reproduzem ate os 11 idade aproximadamente e machos podem reproduzir 15. Dessa forma, estima-se ciclo tres geracoes represente um periodo aproximado 20 anos. A especie, ocorria nos biomas Cerrado, Mata Atlântica, Pantanal...