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Acta Amazonica
Article . 1978 . Peer-reviewed
Data sources: Crossref
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Acta Amazonica
Article
License: CC BY
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Acta Amazonica
Article . 1978
Data sources: DOAJ
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A Amazônia Central e seus peixes

Authors: Sara V. Fink; William I. Fink;

A Amazônia Central e seus peixes

Abstract

Resumo O sistema do rio Amazonas é caracterizado pela sua grande extensão (ele drena uma área de cerca de 6,5 milhões de quilômetros quadrados), sua grande profundidade (de 90 m ou mais em alguns lugares), a topografia plana de sua bacia de drenagem, os ciclos anuais de períodos de cheia e seca, e a estrutura geológica da área de drenagem. O ecossistema da Amazônia Central é complexo e os tipos de "habitat" dentro dele são numerosos, com ampla sobreposição e intergradação de categorias. Um fator especialmente importante no "habitat" aquático é o tipo de água ("branca", "preta" ou "clara"), uma característica que está relacionada ao caráter geológico e a flora da área de drenagem. Mudanças cíclicas no nível da água e flutuações associadas à disponibilidade de oxigênio são dois fatores que exercem considerável influência sobre a biologia dos peixes da Amazônia Central Os locais de coleta do "Alpha Helix" Fase IV são sucintamente descritos. A sistemática e evolução da maioria dos grupos de peixes do Amazonas são muito pouco conhecidas; a incapacidade para identificar todos os peixes examinados e a falta de hipóteses evolucionárias de parentesco bem demonstradas para basear as comparações apresentam problemas para o biólogo comparativo. Um breve estudo dos aspectos gerais da filogenia e da história natural dos peixes examinados pela Fase IV é apresentado, incluindo, quando possível, informação sobre preferência de habitat, alimento, e outros aspectos da biologia dos peixes.

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Keywords

Q1-390, Science (General)

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
15
Average
Top 10%
Average
gold