7 documents found, page 1 of 1

The potential impact of new Andean dams on Amazon fluvial ecosystems

Increased energy demand has led to plans for building many new dams in the western Amazon, mostly in the Andean region. Historical data and mechanistic scenarios are used to examine potential impacts above and below six of the largest dams planned for the region, including reductions in downstream sediment and nutrient supplies, changes in downstream flood pulse, changes in upstream and downstream fish yields, ...

An explicit GIS-based river basin framework for aquatic ecosystem conservation ...

Despite large-scale infrastructure development, deforestation, mining and petroleum exploration in the Amazon Basin, relatively little attention has been paid to the management scale required for the protection of wetlands, fisheries and other aspects of aquatic ecosystems. This is due, in part, to the enormous size, multinational composition and interconnected nature of the Amazon River system, as well as to t...

Goliath catfish spawning in the far western Amazon confirmed by the distributio...

We mapped the inferred long-distance migrations of four species of Amazonian goliath catfishes (Brachyplatystoma rousseauxii, B. platynemum, B. juruense and B. vaillantii) based on the presence of individuals with mature gonads and conducted statistical analysis of the expected long-distance downstream migrations of their larvae and juveniles. By linking the distribution of larval, juvenile and mature adult siz...

Shrimp-eating fishes and a case of prey-switching in Amazon reivers.

Ecosystem-based management of Amazon fisheries and wetlands

Infrastructure development and overfishing in the Amazon make it imperative to define adequate scales for the ecosystem-based management of commercial fisheries and the wetlands on which they depend. We mapped fisheries and fish ecology data from Brazil, Peru, Bolivia and Colombia to an explicit GIS framework of river basins and mainstems. Migratory species account for more than 80% of the known maximum catches...

Goliath catfish spawning in the far western Amazon confirmed by the distributio...

Nós mapeamos as migrações de longa distância inferidas de quatro espécies de bagres da Amazônia (Brachyplatystoma rousseauxii, B. platynemum, B. juruense e B. vaillantii) com base na presença de indivíduos com gônadas maduras e realizamos análises estatísticas da distância longa esperada. migrações a jusante de suas larvas e juvenis. Ao ligar a distribuição das classes de tamanho adulto, larval, juvenil e adult...

The potential impact of new Andean dams on Amazon fluvial ecosystems

O aumento da demanda de energia levou a planos para a construção de muitas novas barragens na Amazônia Ocidental, principalmente na região andina. Dados históricos e cenários mecanicistas são usados para examinar os impactos potenciais acima e abaixo de seis das maiores barragens planejadas para a região, incluindo reduções nos estoques a jusante de sedimentos e nutrientes, mudanças no pulso de inundação a jusa...