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| Registros recuperados: 66 | |
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| Seiler, M.; Schwitzer, C.; Holderied, M.. |
| In response to predation pressure by raptors, snakes, and carnivores, primates employ anti-predator behaviours such as avoiding areas of high predation risk, cryptic behaviour and camouflage, vigilance and group formation (including mixedspecies associations), and eavesdropping on other species’ alarm calls. After detecting a predator, primates can produce alarm calls, show predator-specific escape strategies or even mob the predator. It remains unclear how solitary nocturnal primates respond to diurnal predation pressure while they sleep or rest. The aim of this study was to investigate the diurnal anti-predator behaviour of the nocturnal and solitary Sahamalaza sportive lemur, Lepilemur sahamalazensis, which regularly rests in exposed locations. We... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Critically endangered; Nocturnal primates; Fragmentation; Playback experiments; Predator-specific strategy; 42.84. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/475370 |
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| Andrade, Fabiano Timóteo de; Fisch, Simey Thury Vieira; Fortes Neto, Paulo; Batista, Getulio Teixeira. |
| As florestas tropicais brasileiras em especial a floresta Atlântica e Amazônica foram e continuam sendo alvos constantes de diversas ações antrópicas humanas, que ocasionaram a redução de seus territórios ou ainda sua total fragmentação. Um dos dados mais alarmantes é a perda de sua biodiversidade, que em muitas situações sequer foi conhecida, o que demanda a preocupação com a manutenção sustentável, de forma que várias espécies ainda possam sobreviver. Através de levantamentos na literatura especializada com o tema “o uso de biondicadores na qualidade ambiental em florestas tropicais”, foram elencados os mais utilizados para esse tipo de avaliação com enfoque na avifauna, uma vez que a mesma responde positiva ou negativamente a qualquer fator que altere... |
| Tipo: Article |
Palavras-chave: Fragmentação; Biodiversidade; Ambientes antroporizados; Biodiversity; Fragmentation. |
| Ano: 2011 |
URL: http://hdl.handle.net/2315/171 |
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| Eschmann, C.; Moore, R.; Nekaris, K.A.I.. |
| The study of calling patterns is a useful non-invasive method for determining population densities and the taxonomic relationships of rare or cryptic animal species. The Western purple-faced langur Trachypithecus vetulus nestor, endemic to Sri Lanka’s lowland rainforests, is severely impacted by forest fragmentation, with most remaining populations living almost completely in home gardens. Due to their shy nature, little is known about the behaviour of this subspecies; analysing the regular loud calls emitted by these langurs could allow for improvement of census techniques, clarification of their taxonomy, and an understanding of the impact of forest destruction on their behaviour. In 2007, we recorded the calling patterns of five male T. v. nestor at... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bioacoustics; Taxonomy; Colobinae; South Asia; Fragmentation; 42.84. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/280454 |
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| CHIARELLO,A. G.. |
| A survey of mammals and birds was carried out in a semi-deciduous forest fragment of 150 ha located in a zone of intensive agriculture in Ribeirão Preto, State of São Paulo, south-eastern Brazil. Line transect sampling was used to census mammals and birds during six days, totalling 27.8 km of trails and 27.8 hours of observation. Twenty mammal species were confirmed in the area (except bats and small mammals), including rare or endangered species, such as the mountain lion (Puma concolor), the maned wolf (Chrysocyon brachyurus), and the ocelot (Leopardus pardalis). The brown capuchin monkey (Cebus apella) and the black-tufted-ear marmoset (Callithrix penicillata) were found frequently, suggesting high population density in the fragment. Regarding the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avifauna; Conservation; Fragmentation; Mammals; São Paulo. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000200007 |
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| Castilheiro,Welvis Felipe Fernandes; Santos Filho,Manoel dos. |
| The current study aimed to evaluate the diet of Monodelphis glirina (Wagner, 1842) in forest fragments of Alta Floresta, located in the south of the Amazon, state of Mato Grosso. The diet was determined by the analysis of the stomach contents from 57 subjects sampled between May and September 2009. Nine food categories were present: Coleoptera, Orthoptera, Hymenoptera, Diplopoda, Nematoda, seeds, miscellaneous, hair and bait leftovers (banana and peanut butter). Coleoptera was the category eaten most frequently, rating 50% of abundance and 91.22% of occurrence. "Seeds" were the least abundant (0.11%) and rated 1.75% in occurrence, probably because seeds are easy to digest. The size of the fragments negatively and significantly influenced the amount of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coleoptera; Food items; Fragmentation; Insectivore. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000300001 |
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| Barbosa,Veralucia S.; Leal,Inara R.; Iannuzzi,Luciana; Almeida-Cortez,Jarcilene. |
| In this study we selected three habitats that correspond to a light gradient, and consequently a proportion of pioneer plant species gradient edges, trails and forest core and described their herbivorous insect assemblage. We tested five hypothesis about the herbivorous assemblage: (1) there is a different distribution of abundance and richness of order between habitats, (2) species similarity between habitats is smaller than within habitat, (3) in forest edge the herbivores are more abundant than in trails and interior of the forest, (4) in nuclear areas herbivore richness and diversity are higher than in the trails and edge, and (5) the abundance and richness of herbivores are different between seasons. Herbivorous were sampled during November 2000 - May... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragmentation; Herbivorous insect assemblage; Herbivory; Insect diversity; Plant defense; Plant-insect interaction. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000500001 |
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| Salomão,Renato P.; Iannuzzi,Luciana. |
| Human activities in tropical forests are the main causes of forest fragmentation. According to historical factor in deforestation processes, forest remnants exhibit different sizes and shapes. The aim of the present study was to evaluate the dung beetle assemblage on fragments of different degree of sizes. Sampling was performed during rainy and dry season of 2010 in six fragments of Atlantic forest, using pitfall traps baited with excrement and carrion. Also, we used two larger fragments as control. We used General Linear Models to determine whether the fragments presented distinguished dung beetle abundance and richness. Analysis of Similarities and Non-Metric Multidimensional Scaling were used to determine whether the dung beetle assemblage was grouped... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragmentation; Habitat change; Scarabaeidae. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000200126 |
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| BUSTAMANTE-SÁNCHEZ,MARCELA A.; GREZ,AUDREY A.; SIMONETTI,JAVIER A.. |
| Habitat fragmentation may result in changes in species number and population abundance among habitats that differ in area, structure, or edge characteristics. These changes, in turn, may result in alterations in ecosystem process such as decomposition of organic matter. Through an experimental approach, we compared the beetles assemblages associated with dung and decomposition of cow feces in a continuous portion of Maulino forest, forest fragments and in pine plantations that surround this forest and forest remnants. Abundance and richness of dung-associated beetles were lower in forest fragments compared to the continuous forest and pine plantations. However, dung decomposition was similar in these three habitats. Beetle abundance, species richness and... |
| Tipo: Journal article |
Palavras-chave: Temperate forest; Fragmentation; Insects; Decomposition. |
| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000100009 |
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| Registros recuperados: 66 | |
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