Data/hora: 23/09/2024 10:37:02

Biblioteca(s): 	Embrapa Pantanal.	
Data corrente: 	20/07/2004	
Data da última atualização: 	27/03/2017	
Autoria: 	RESENDE, E. K. de.	
Afiliação: 	Embrapa Pantanal (Corumbá, MS).	
Título: 	Migratory fishes of the Paraguay-Paraná basin excluding the upper Paraná basin.	
Ano de publicação: 	2003	
Fonte/Imprenta: 	In: CAROLSFELD, J.; HARVEY, B.; ROSS, C.; BAER, A. (Ed.). Migratory fishes of South America: biology, fisheries and conservation status. Victoria: World Fisheries Trust; Washington: The World Bank; Ottawa: International Development Research Centre, 2003. p.99-155.	
Idioma: 	Inglês	
Conteúdo: 	The Parana-Paraguay Basin encompasses most of southeastern Brazil, Paraguay, eastern Bolivia, and northern Argentina. As such, together with the smaller Uruguay River, ir drains most of the central part of the continent southward into the Rio de La Plata estuary on the east coast (Figure 1). In size, it covers 2,800,000 square kilometers, second only to the Amazon Basin in South America. The Brazilian highlands and adjacent plateaus of the center of the continent are drained to the south by Paraguay and Parana rivers; the Sao Francisco drains these to the northeast and the amazon to the north. These highlands were worn down to sea level during the Paleozoic Era but were then uplifted again to their present elevations as the Andes formed, variously stagnatinag water drainage in temporary saline lakes and seways and changing directions and connectivity of river systems in the process. The present topography ranges from level plateaus to rolling hills and deeply cut valleys. Most of the drainage system of the Parana-Paraguay Basin is hot and humid throughout the year, but with rains during the wet season primarily from October to March. Fifty percent more rain falls in the highlands than on the plains (respectively 1200 mm and 800 mm per annum), leading to substantial seasonal floods that are important to the biology of the basin. The Parana River originates at the confluence of the Grande and Paranaiba rivers in southern Brazil, and then runs generally southwest for 3,998 km before draining into the Rio de La Plata estuary. Eastern tributaries in the upper poart, such as the Tiete, Paranapanema, and Iguacurivers, originate in the coastal mountains a short distance from the Atlantic but drain inland to contribute to the Parana system. In some cases, as with the Tiete, the headwaters are situated in some of the most densely populated areas of the continent, and the upper reaches of the Parana are the areas most intensively developed for hydroeletric generation. The Parana River can be divided into upper, high, midle, and lower sections, each with distinctive geographic, social or biological charcters. Of these, the Upper Parana has historically been adequately separated from the rest of the basin by the falls of Sete Quedas to be recognized as a distinct ictiofaunistic "province". This portion of the basin is also sufficiently distinct in terms of social character that it is treated separately in the previous chapter, whereas the remainder of the basin is discussed here. The Paraguay River originates west of the Mato Grosso plain in south-central Brazil, at 298 m above sea level. It is the fifth longest river in South America (2,550 km), and is the principal western tributary of the Parana. Its basin spreads over more than 973,000 sqaures kilometers, including large parts of Brazil, Paraguay, and Bolivia. Throughout the basin, elevations rarely exceed 200 meters above sea level. The river is accessible to ocean-going ships and is plied mainly by local steamers travelling between the capitals of Argentina and Paraguay. The Paraguay River has also been described in four sections by some authors, with the Upper and High Paraguay together constituting an ictiofaunistic province distinct from the rest of the basin. However, the distinction of the subdivision of the halves of the river are not as clear in the Paraguay as in the Parana, so I have opted to use the more common terminology of simply the Upper and Lower Paraguay.	
Palavras-Chave: 	Bacia Rio Paraguai-Paraná; Conservation; Impact; Impacto; Management; Migração; Migration; Migratory fishes; Paraguay-Paraná basin; Peixe migratório.	
Thesagro: 	Conservação; Manejo; Peixe.	
Thesaurus Nal: 	fish.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Pantanal (CPAP)	
Exemplares: 	CPAP - (53955-1) - UPC - SP - PP - SP16543 -  - 16543 - DIS