Tocantins River
Mostrando 13-24 de 60 artigos, teses e dissertações.
-
13. Feeding ecology of stream-dwelling Characidae (Osteichthyes: Characiformes) from the upper Tocantins River, Brazil
In this contribution we studied the trophic ecology of four Characidae species from the Cavalo Stream, upper Tocantins River, considering diet overlap and trophic niche breadth. The diet of the four species was composed of adult and immature insects, both autochthonous and allochthonous in origin. Autochthonous items dominated the diet of Moenkhausia dichrou
Zoologia (Curitiba). Publicado em: 06/12/2013
-
14. Arqueologia na região dos interflúvios Xingu-Tocantins: a ocupação tupi no Cateté. / Archaeology in the watershed Xingu-Tocantins region: the ocupation of Tupi in the Cateté River
Located in the Xingu, Araguaia and Tocantins Rivers watershed, the Cateté River region has a longstanding history of indigenous settlements. Such history was recorded through archaeological sites where fragments of pottery connected to the Incised Rim and Barrancoid traditions were found - the sites date back as far as 190 AD, and are related to the expansi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/03/2012
-
15. Deficient downstream passage through fish ladders: the case of Peixe Angical Dam, Tocantins River, Brazil
A passagem descendente de peixes em mecanismos de transposição permanece pouco investigada na América do Sul. Inspirado nessa falha, o presente estudo monitorou a escada de peixes instalada na barragem da UHE Peixe Angical, alto rio Tocantins, entre setembro de 2009 e agosto de 2010. Para investigar a extensão da passagem rio abaixo, a fauna de peixes fo
Neotrop. ichthyol.. Publicado em: 2012-10
-
16. Application of shallow seismic profiling to study riverbed architectural facies: a case study of the Tocantins river (Pará - Brazil)
Até hoje, a maior parte dos estudos de sedimentologia fluvial tem adotado dois principais métodos de investigação: observação direta de trincheiras, faces expostas e testemunhos, ou levantamento geofísico nas regiões emersas ou rasas das barras fluviais. Neste estudo, um perfilador acústico de subfundo foi utilizado para investigar a estratigrafia d
Anais da Academia Brasileira de Ciências. Publicado em: 2012-09
-
17. Diversity and microdistribution of black fly (Diptera: Simuliidae) assemblages in the tropical savanna streams of the Brazilian cerrado
We describe the abiotic factors affecting the distribution of black flies at a microhabitat scale, rather than at the regional scale usually present in the literature on the Neotropics. Black fly larvae were sampled from the Tocantins River and three tributaries, located in the Brazilian savanna (state of Tocantins, Brazil) during six bi-monthly sampling per
Memórias do Instituto Oswaldo Cruz. Publicado em: 2012-05
-
18. Caracterização, diagnóstico e zoneamento ambiental: o exemplo da Bacia Hidrográfica do Rio Formiga-TO
This thesis proposes na Environmental Zoning of watershed under the perspective of the landscape, the Geography category of analysis, adopting as studied area the River Basin of Formiga River in the state of Tocantins. This Basin covers the land area of the municipalities of Ipueiras, Santa Rosa do Tocantins, Silvanópolis and Pindorama do Tocantins. It also
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/12/2011
-
19. Patterns of richness and diversity of stream fish and local-regional relationship, Tocantins-Araguaia basin, center-west region / Padrões de riqueza e diversidade de peixes de riacho e a relação local-regional, bacia Tocantins-Araguaia, região Centro-Oeste
This research aims to assess the fish biodiversity of the streams of the Tocantins and Araguaia basin and test the relative influence of local and regional processes in determining local species richness by examining the relationship between local species richness and regional species richness. For this purpose were sampled 18 streams in the basin of the Ara
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/04/2011
-
20. Geographic distribution of Hemigrammus ora (Ostariophysi: Characiformes: Characidae) in the Amazon basin, Brazil
New records of Hemigrammus ora Zarske, Le Bail & Géry, 2006, previously believed to be endemic to the French Guiana drainages, are confirmed for Brazilian drainages. The species is reported from the Tocantins-Araguaia system and lower Amazon River. Morphometric and meristic data, previously undescribed morphological traits related to caudal-fin squamation a
Zoologia (Curitiba). Publicado em: 2011-08
-
21. Hot spots for diversity of Magnaporthe oryzae physiological races in irrigated rice fields in Brazil.
Abstract ? The objective of this work was to evaluate the Magnaporthe oryzae pathotype diversity in new commercial irrigated rice fields in the Araguaia River Valley, state of Tocantins, Brazil. The causal agent of rice blast has heavily affected rice production in the region. Despite the efforts of breeding programs, blast resistance breakdown has been reco
Pesquisa Agropecuária Brasileira. Publicado em: 2011
-
22. Mapa de classes de erodibilidade de parte da regiao do Rio Taquari baseado em imagens TM-Landsat.
O trabalho apresenta a contribuicao dos estudos geologicos complementados com dados geomorfologicos para a obtencao de mapas de classes de erodibilidade. Faz parte do Projeto Mulpan (dados multissensores para levantamentos do meio fisico no Pantanal), desenvolvido dentro do Convenio de Cooperacao Tecnico-Cientifica INPE/Embrapa. Escolheu-se como exemplo a Fo
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
-
23. Impacto de condicionantes hidrológicas na definição de traçados rodoviários : aplicação na rodovia TO-247
The contribution of this research is given by the design of effective impacts of highways, through the expansion of the influence areas beyond the linear tracks, adding the assessment of the environmental sensitivity of watersheds in order to optimize the layout of road projects. It was produced an orderly and systematic approach of the cause and consequence
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
-
24. Estrutura populacional e alometria reprodutiva de Podocnemis expansa (Testudines, Podocnemididae) no entorno do Parque Nacional do Araguaia, Tocantins / Population structure and reproductive allometry of Podocnemis expansa (Testudines, Podocnemididae) around the Parque Nacional do Araguaia, Tocantins
Among the reptiles found in the Amazon, the turtles stand out because of its diversity and economic importance. Podocnemis expansa, popularly known as Amazon river turtle, is considered the largest freshwater turtle in South America and has been heavily exploited for centuries by many indigenous and riverine communities. This study aimed to expand the knowle
Publicado em: 2010