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Registros recuperados: 7
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Riqueza e composição de vertebrados em latrinas ativas e inativas de Pteronura brasiliensis (Carnivora, Mustelidae) na Amazônia Oriental, Brasil Iheringia, Sér. Zool.
Togura,Cintia M.; Norris,Darren; Michalski,Fernanda.
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 obtidos registros de 22 espécies de...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Armadilha-fotográfica; Interações interespecíficas; Recurso alimentar.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000100010
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Dogs can detect scat samples more efficiently than humans: an experiment in a continuous Atlantic Forest remnant Rev. Bras. Zool.
Oliveira,Márcio L. de; Norris,Darren; Ramírez,José F. M.; Peres,Pedro H. de F.; Galetti,Mauro; Duarte,José M. B..
Scat-detection dogs have been used to locate feces of rare and elusive species across tropical biomes. However their detection efficiency in relation to human observers has rarely been evaluated. In this study, we evaluated the ability of a scat detection dog to locate feces in comparison with human researchers. Human researchers and a scat detection dog surveyed for deer (Mazama spp.) feces in dense ombrofilous Atlantic forest in the Paranapiacaba continuum, SP, Brazil. A controlled experiment was used to assess the maximum effective perpendicular distance from a transect search line that the dog could detect a Mazama spp fecal sample. Results from a linear regression model revealed that the maximum effective perpendicular distance from a transect search...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Deer; Fecal samples; Mazama; Sampling.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000200012
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Activity pattern of Cuniculus paca (Rodentia: Cuniculidae) in relation to lunar illumination and other abiotic variables in the southern Brazilian Amazon Rev. Bras. Zool.
Michalski,Fernanda; Norris,Darren.
Understanding what influences the activity of organisms is important for both ecological understanding and species conservation. Using data from 2,707 camera trap days distributed across 24 forest sites, we present quantitative analyses of the activity pattern of Cuniculus paca (Linnaeus, 1766) in southern Amazonia. We compared the activity pattern of this species across four designated subsets of the 24-hours diel cycle (dawn, dusk, day and night). Using linear regression models we tested the influence of season, temperature and rainfall on the activity patterns of C. paca (paca). We also evaluated the nocturnal photos of paca (N = 111) as a function of the degree of lunar illumination in order to test the prediction that pacas minimize their activity...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Behavioral flexibility; Camera trapping; Lunar phobia; Moon phase; Temporal activity.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000600002
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Abiotic modulators of Podocnemis unifilis (Testudines: Podocnemididae) abundances in the Peruvian Amazon Rev. Bras. Zool.
Norris,Darren; Pitman,Nigel C.A.; Martínez Gonzalez,Jerry; Torres,Eriberto; Pinto,Fernando; Collado,Hernán; Concha,Wilberth; Thupa,Raúl; Quispe,Edwin; Pérez,Jorge; Flores del Castillo,Juan Carlos.
Previous studies have demonstrated that river-based surveys can provide an inexpensive source of information for neotropical zoologists, yet little information is available to inform the application of this technique for the long term monitoring of neotropical turtle species. We aimed to fill this gap by presenting an assessment of data collected during 333 river surveys over 50 months along rivers in a newly protected area in the Peruvian Amazon. A total of 14,138 basking Podocnemis unifilis Troschel, 1848 were recorded during 13,510 km of river-based surveys. We used generalized additive models (GAMs) to explore the influence of a series of abiotic and seasonal variables on the recorded abundances at two temporal scales: monthly and per trip. Our...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Basking survey; Conservation; Population monitoring; River turtles; Sighting rates.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000300008
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Socio-economic and spatial determinants of anthropogenic predation on Yellow-spotted River Turtle, Podocnemis unifilis (Testudines: Pelomedusidae), nests in the Brazilian Amazon: Implications for sustainable conservation and management Rev. Bras. Zool.
Norris,Darren; Michalski,Fernanda.
Human expansion has drastically affected wildlife species across Amazonian waterways and the continued increase in rural populations across Amazonia is likely to increase pressure on widely exploited chelonian species. The lack of information evaluating determinants of human consumption patterns limits the effective implementation of conservation strategies. Our objective was to determine the relative importance of social, economic, and spatial variables on human exploitation of Podocnemis unifilis Troschel, 1848 around a sustainable-use protected area in the eastern Brazilian Amazon. We conducted interviews with 51 riverine residents to evaluate attitudes towards and exploitation of P. unifilis. We used multimodel inference to evaluate 12 working...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Egg consumption; Human impact; Management programmes; Nest predation; Turtle conservation.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000500003
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Artificial nest predation rates vary depending on visibility in the eastern Brazilian Amazon Acta Amazonica
Michalski,Fernanda; Norris,Darren.
Observational and experimental studies have shown that increased concealment of bird nests reduces nest predation rates. The objective of the present study was to evaluate differences in predation rates between two experimental manipulations of artificial ground nests (i.e., clearing an area around the artificial nest or leaving it as natural as possible), and test whether environmental variables also affected nest predation in an undisturbed area of Amazonian forest in eastern Brazil. A generalized linear model was used to examine the influence of five variables (manipulation type, perpendicular distance from the main trail, total basal area of trees surrounding the nest site, understorey density, and liana quantity) on nest predation rates. Model...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Experimental manipulation; Potential biases; Quail egg.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000300013
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A Survey of mid and large bodied mammals in Núcleo Caraguatatuba, Serra do Mar State Park, Brazil Biota Neotropica
Norris,Darren; Ramírez,José Moreira; Zacchi,Carlos; Galetti,Mauro.
We applied complementary survey techniques to obtain a baseline species list of mid and large bodied mammals in Núcleo Caraguatatuba, Serra do Mar State park, Brazil. Between May and September 2011 we surveyed the community of mid and large bodied mammals using diurnal line transect census (212.4 km), camera-traps (223.2 camera-trap days) and track-stations (478 track-station days). A total of 18 species were recorded from 14 families in eight orders. We recorded the presence of seven species considered threatened in the State of São Paulo, including Primates (Brachyteles arachnoides), Artiodactyla (Mazama cf. americana and Tayassu pecari), Carnivora (Leopardus pardalis, Leopardus tigrinus and Puma concolor) and Perissodactyla (Tapirus terrestris). Based...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic forest; Inventory; Mammals; Protected area.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000200013
Registros recuperados: 7
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