By Brian Harvey, Anton Baer, Joachim Carolsfeld, Carmen Ross
Fish species that migrate in the nice rivers of South the US aid vital neighborhood fisheries yet are little recognized outdoor their local variety. This publication, written specially for the realm financial institution and the foreign improvement study Centre, represents the 1st choice of medical specialists on those amazing fish. The authors hide the higher Parana, Paraguay-Parana, Uruguay and Sao Francisco basins in Brazil, in addition to the Brazilian and Colombian Amazon. They talk about not just the valuable migratory species and their attention-grabbing dating with the water cycle within the rivers and wetlands, but additionally the fisheries they aid, and their usually precarious conservation prestige.
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Additional info for Migratory Fishes of South America: Biology, Fisheries and Conservation Status
On the eastern margin, the main tributaries are the Tiête, Paranapanema, Ivai, Piquiri and Iguaçu rivers (Figure 1). Water Uses In São Paulo State the estimated urban demand for water is 87 m3/s, with 50% returned to rivers. Only 8% of this water receives treatment. Industrial water demand in São Paulo State is 113 m3/s, with 68% returned to rivers. , 2000 CERH-SP, 1990 MIGRATORY FISHES OF SOUTH AMERICA 25 cattle, the intense use of pesticides and fertilizers and the removal of riparian vegetation have all worsened water quality in the main tributaries and in the Paraná itself.
Conceptual model representing the behaviour of Prochilodus lineatus in the Upper Paraná River Basin (A) and environments used during its life cycle (B) .................................................................. 43 Figure 9. Annual catches of large migratory species in the artisanal fisheries of the Itaipu Reservoir as total yield (bar graph) and CPUE (line graph) ...................................................................................................................................
Data on growth of migratory species in the Upper Paraná are limited to four species (P. lineatus, P. maculatus, R. vulpinus and R. aspera). Two further species (P. corruscans and S. maxillosus) were studied in other regions of the basin (Table 2). The maximum lengths registered for other species in the Upper Paraná are also listed in Table 2. P. luetkeni is the heaviest fish in the basin and may grow up to 150 kg. 4 P. mesopotamicus P. pirinampu P. maculatus P. lineatus P. corruscans P. granulosus R.