Line Transect
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Mineralogical and chemical attributes of soils from the Brazilian Atlantic Forest domain
ABSTRACT: The Atlantic Forest is one of the most important and yet the most devastated Brazilian biome, occupying in the past the majority of the East Atlantic Coast. Therefore, a detailed knowledge of the soils near the coastal line influenced by this biome is essential for land use and management of these environments. The aim of this study was to acquire
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-02
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2. Humpback whale Megaptera novaeangliae (Cetartiodactyla: Balaenopteridae) group sizes in line transect ship surveys: An evaluation of observer errors
ABSTRACT Accurate estimates of group sizes through line transect sampling methods are important to correctly ascertain the abundance of animals that occur in groups. Since the average observed group size is a component of the distance sampling formula, bias in these data leads to biased abundance estimates. This study aimed to evaluate the potential errors i
Zoologia (Curitiba). Publicado em: 06/05/2016
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3. Missing for the last twenty years: the case of the southernmost populations of the Tropical Mockingbird Mimus gilvus (Passeriformes: Mimidae)
The Tropical Mockingbird Mimus gilvus (Vieillot, 1808) is a widespread species in the Neotropics, but its southernmost populations in Brazil are ecologically (and possibly taxonomically) distinct, occurring only along the coast in restinga vegetation. Once considered the most common bird in restinga, it is becoming increasingly rare, likely due to habitat lo
Zoologia (Curitiba). Publicado em: 2015-02
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4. 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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5. 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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6. Dogs can detect scat samples more efficiently than humans: an experiment in a continuous Atlantic Forest remnant
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 sur
Zoologia (Curitiba). Publicado em: 2012-04
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7. DISTRIBUIÇÃO E DENSIDADE DE POPULACÕES DE CALLICEBUS COIMBRAI KOBAYASHI &LANGGUTH 1999, NA REGIÃO DO REFÚGIO DE VIDA SILVESTRE MATA DO JUNCO, SERGIPE. / DISTRIBUTION AND DENSITY OF POPULATIONS CALLICEBUS COIMBRÃO KOBAYASHI &LANGGUTH 1999, IN THE REGION OF ESCAPE OF LIFE WILD FOREST OF JUNK, SERGIPE.
O guigó, Callicebus coimbrai, é um primata ameaçado de extinção, endêmico do Nordeste Brasileiro (Sergipe e Bahia) e tem sua distribuição geográfica caracterizada por níveis críticos de desmatamento e fragmentação de hábitat. O Refúgio de Vida Silvestre Mata do Junco, situa-se no município de Capela, Estado de Sergipe, Brasil e representa uma
Publicado em: 2011
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8. Distribution and relative abundance of large whales in a former whaling ground off eastern South America
Ship-based sighting surveys for cetaceans were conducted in the former whaling ground off the northeastern coast of Brazil. The cruises took place in winter and spring of 1998-2001 with the objectives of investigating current distribution and abundance of cetaceans, particularly large whale species taken during whaling. In 1998 the survey were conducted betw
Zoologia (Curitiba). Publicado em: 2010-10
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9. 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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10. 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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11. 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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12. 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