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Fish Abundance Related to Organic Matter in the Plata River Basin, South America

QUIROS, R ; BAIGUN, C

Transactions of the American Fisheries Society (1900), 1985-01, Vol.114 (3), p.377-387 [Periódico revisado por pares]

Bethesda, MD: Taylor & Francis Group

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  • Título:
    Fish Abundance Related to Organic Matter in the Plata River Basin, South America
  • Autor: QUIROS, R ; BAIGUN, C
  • Assuntos: Animal and plant ecology ; Animal, plant and microbial ecology ; Animals ; Autoecology ; Biological and medical sciences ; Freshwater ; Fundamental and applied biological sciences. Psychology ; Pisces ; Vertebrata
  • É parte de: Transactions of the American Fisheries Society (1900), 1985-01, Vol.114 (3), p.377-387
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
    ObjectType-Article-1
    ObjectType-Feature-2
  • Descrição: The ichthyofauna of the Plata River Basin (Argentina, Uruguay, Paraguay, Brazil, Bolivia) consists mainly of illiophagous (mud‐eating) and detritivorous species. The primary productivity of phytoplankton is generally low. Regressions of ichthyomass and catch per unit effort against total organic nitrogen, total organic carbon, and other variables indicate that much of the spatial variability in fish abundance is explained by the content of the organic matter in the water column. These relationships are demonstrated for the Middle Paraná River and for the Salto Grande Reservoir on the Uruguay River. More limited evidence suggests that water column organic matter influences fish distribution elsewhere in the basin as well, and may account for the higher average fish abundance at the mouths of tributary rivers and streams of the Paraná and Uruguay rivers. Received February 29, 1984 Accepted February 28, 1985
  • Editor: Bethesda, MD: Taylor & Francis Group
  • Idioma: Inglês
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