Line Transects
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Severe population decline of marsh deer, Blastocerus dichotomus (Cetartiodactyla: Cervidae), a threatened species, caused by flooding related to a hydroelectric power plant
Balancing power production and environmental conservation can be problematic. The objective of this study was to investigate the abundance of marsh deer in the Paraná River Basin, above the Sergio Motta (Porto Primavera) Dam, before and after the impact of the dam closure. A fixed-wing, flat window aircraft was used to survey study transects. Observations w
Zoologia (Curitiba). Publicado em: 20/12/2013
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2. Evaluation of natural foci of Panstrongylus megistus in a forest fragment in Porto Alegre, State of Rio Grande do Sul, Brazil
Introduction Panstrongylus megistus is commonly found in wild environments of the State of Rio Grande do Sul, Brazil. The aim of this study was to characterize the network of refuges used by triatomine in a forest fragment of Porto Alegre and to identify Trypanosoma cruzi infection, associated hosts and the epidemiological importance of both hosts and tria
Rev. Soc. Bras. Med. Trop.. Publicado em: 2013-09
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3. How much effort should be employed for surveying a low-diversity Amazonian mammal assemblage using line-transects?
Line-transect surveys are commonly used for sampling large mammals, but estimates of the effort needed to reliably surveying low-diversity assemblages of mammals are scarce. Using data from line-transects and species accumulation curves, I examined whether or not a sampling effort previously suggested to survey mammals elsewhere (ca. 85-100 km) would be sati
Zoologia (Curitiba). Publicado em: 2013-02
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4. Qualitative improvements in the modeling of bathymetric survey in reservoirs through computational tool \"CAV-NH\" / Melhorias qualitativas na modelagem de levantamentos batimétricos em reservatórios por meio da ferramenta computacional \"CAV-NH\"
Freshwater is a finite mineral resource and essential for sustaining life on earth. For proper water resource management in the watershed, it is important to know the reservoirs Elevation-Area-Volume (EAV) curve. Energy companies and government agencies use this curve for their decision-making, considering the multiple uses of the reservoirs. Due to the rese
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/08/2012
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5. Estrutura e riqueza de hepáticas (Marchantiophyta) epifíticas em áreas fragmentadas de Cerrado com borda natural e antrópica / Estrutura e riqueza de hepáticas (Marchantiophyta) epifíticas em áreas fragmentadas de Cerrado com borda natural e antrópica / Structure and richness of the epiphytic liverworts (Marchantiophyta) in fragmented areas of Cerrado with natural edge and anthropogenic / Structure and richness of the epiphytic liverworts (Marchantiophyta) in fragmented areas of Cerrado with natural edge and anthropogenic
The damage caused by the proliferation of edge in forest cover, referred to as edge effects are extensive, may occur over large spatial scales influencing species composition, structure and ecological processes in boundaries of ecosystems. However, studies have shown highly variable response patterns of the taxonomic group studied in relation to the landscap
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/06/2010
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6. Estimativa de densidade de aves utilizando amostragem por distâncias em uma área verde urbana / Estimation of bird density through distance sampling in an urban green area
O monitoramento de populações de aves em ambientes urbanos pode ser difícil devido à alta heterogeneidade, estrutura complexa e às vezes baixa visibilidade. Diferentes metodologias podem ser usadas para contagem de aves, mas, para monitoramentos, é interessante que metodologias robustas que reflitam mudanças reais em populações sejam usadas. Contage
Publicado em: 2010
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7. Habitat use by Callicebus coimbrai (Primates: Pitheciidae) and sympatric species in the fragmented landscape of the Atlantic Forest of southern Sergipe, Brazil
Anthropogenic habitat fragmentation is a chronic problem throughout the Brazilian Atlantic Forest biome. In the present study, four forest fragments of 60-120 ha were surveyed on a rural property in southern Sergipe, where two endangered primate species, Callicebus coimbrai Kobayashi & Langguth, 1999 and Cebus xanthosternos Wied-Neuwied, 1826, are found. Two
Zoologia (Curitiba). Publicado em: 2010
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8. Mamíferos de médio e grande porte em uma área alterada no cerrado : estrutura da comunidade, sobreposição de nicho e densidade
Medium and large sized mammals in a disturbed area in the Cerrado: community structure, niche overlap and density. Medium and large sized mammals are affected by fragmentation and habitat changes, and in Cerrado this group corresponds to species preferentially nocturnal, generalist in habitat use and with scarce information about density in modified environm
Publicado em: 2010
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9. DISTRIBUIÇÃO E ESTIMATIVAS POPULACIONAIS DO BOTO Inia geoffrensis (DE BLAINVILLE, 1817) (INIIDAE) NO MÉDIO RIO ARAGUAIA (BRASIL CENTRAL)
This is the first study about the abundance and density of the boto Inia geoffrensis using Distance sampling in the Araguaia River (Central Brazil). The study was carried out along a 530 km section of the Middle Araguaia River. The surveys were conducted in May and September 2009 (during falling and dry water seasons), where strip and line transects were emp
Publicado em: 2010
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10. LEVANTAMENTO DAS POPULAÇÕES DE CALLICEBUS COIMBRAI KOBAYASHI &LANGGUTH, 1999 EM FRAGMENTOS DE MATA ATLÂNTICA NO SUL DO ESTADO DE SERGIPE, BRASIL. / SURVEY OF THE POPULATIONS OF CALLICEBUS COIMBRAI KOBAYASHI &LANGGUTH, 1999 IN FRAGMENTS OF THE ATLANTIC FOREST IN THE SOUTH OF THE BRAZILIAN STATE OF SERGIPE.
Coimbra-Filhos titi monkey (Callicebus coimbrai Kobayashi &Langguth, 1999) is an endangered, but poorly-known primate that inhabits remnants of the Atlantic Forest in the Brazilian states of Sergipe and Bahia (northern coast). The present study aimed to evaluate the effects of habitat fragmentation on the ecological characteristics and provide information on
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2009
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11. Ant community structure in Neotropical savannas: a test of generality contrasting Brazil and Australia / Estrutura de comunidades de formigas em savanas arbóreas tropicais: um teste da generalidade de padrões ecológicos contrastando Brasil e Austrália
The aim of this study was to compare ant community structure between the savannas of Brazil and Australia. The study was conducted in woodland savanna areas nearby Darwin, in northern Australia, and Uberlândia and Caldas Novas in central Brazil. The sampling design consisted of eight 400 m line transects, four in each continent, with eight pitfall traps and
Publicado em: 2009
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12. Técnicas de amostragem e a detecção de mamíferos terrestres na Floresta Amazônica.
Though used extensively the diurnal line-transect census method does not provide high quality information on the occurrence and abundance of many mammal species in the Amazonian forest, especially for larger and less abundant species. This study evaluated the effectiveness of diurnal line-transects with nocturnal line-transects and camera traps to detect ter
Publicado em: 2008