Artigo

Impactos Da Hidrelétrica Samuel Sobre As Comunidades De Peixes Do Rio Jamari (Rondônia, Brasil)

The Samuel dam is located 50Km from Porto Velho, Rondônia, on the Jamari river, the first right margintributary of Madeira river, in Brazil. Construction began in April, 1982 and the turbines went on line seven years later. A comparative study of the ichthyofauna was undertaken in the water bodies i...

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Autor principal: Santos, Geraldo Mendes dos
Grau: Artigo
Idioma: pt_BR
Publicado em: Acta Amazonica 2020
Assuntos:
Amazon
Fisheries
Hydroelectric Dam
Environmental Impacts
Ichthiofauna
Rondonia
Amazônia
Pesca
Hidrelétrica
Impacto Ambiental
Letiofauna
Rondônia
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/13099
id oai:repositorio:1-13099
recordtype dspace
spelling oai:repositorio:1-13099 Impactos Da Hidrelétrica Samuel Sobre As Comunidades De Peixes Do Rio Jamari (Rondônia, Brasil) Impacts of the Samuel Hydroelectric Dam on the Fish Communities of the Jamari River, in Rondônia, Brazil Santos, Geraldo Mendes dos Amazon Fisheries Hydroelectric Dam Environmental Impacts Ichthiofauna Rondonia Amazônia Pesca Hidrelétrica Impacto Ambiental Letiofauna Rondônia The Samuel dam is located 50Km from Porto Velho, Rondônia, on the Jamari river, the first right margintributary of Madeira river, in Brazil. Construction began in April, 1982 and the turbines went on line seven years later. A comparative study of the ichthyofauna was undertaken in the water bodies influenced by the dam, during both pre and pos impoundment phases. The study shows that ichthyofauna was seriously affected by the dam: there was an overall decrease in fish diversity, while a few species increased their numbers, including: Cichlasp. (tucunare), Schizodon fasciatus(aracu comum), Hypophthalmus marginatus(mapará) and Serrasalmus rhombeus(piranha preta). Just below the dam, the population of a small Pimeloclusspecies (mandi) increased. Reduction on dctrilivorous and frugivorous fishes and increase in piscivorous was also observed, The fish communities in the main chanci appear to have been more affected by the dam than the communities of the river marginal lakes. Fishing activity, previously restricted to the Jamari's mouth, now occors intensively in the reservoir, as well, where it constitutesa serious problem for fishery management. These aspects are briefly commented and some options are proposed to guarantee the fish sustainability harvests in the area.", 'en A Usina Hidrelétrica de Samuel está localizada no rio Jamari, primeiro afluente da margem direita do rio Madeira, cerca de 56 km abaixo de Porto Velho-RO. A hidrelétrica teve sua construção iniciada em abril/1982 e entrou em operação a partir de abril/89. O estudo comparativo da ictiofauna, na área de influência daquela hidrelétrica, nas fases de pré e pós-enchimento do reservatório, mostra que as comunidades de peixes sofreram profundas alterações pelo represamentohouve redução da diversidade no reservatório, bem como o aumento de pira-nha-preta (Serrasalmuts rhombeus),tucunaré (Cichla monoculus),aracu-comum (Schizodon fasciatus)e mapará (Hypophthalmus edentatus);imediatamente à jusante da represa houve um aumento de mandi (Pimelodus blochii)\\além disso, houve redução dos peixes detritívoros e frugívoros e aumento dos piscivoros.As comunidades de peixes do canal principal do Jamari parecem ter sido mais influenciadas pelo represamento do rio do que aquelas dos lagos marginais. A atividade pesqueira, antes restrita à foz do Jamari, foi intensificada na área do reservatório e isso vem constituindo-se num sério obstáculo para o manejo da pesca. Estes aspectos são comentados e algumas ações são propostas para melhor gerenciamento da pesca c sustentabilidade dos recursos pesqueiros. 2020-04-24T15:14:24Z 2020-04-24T15:14:24Z 1995 Artigo https://repositorio.inpa.gov.br/handle/1/13099 10.1590/1809-43921995253280 pt_BR Volume 25, Número 3-4, Pags. 247-280 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Acta Amazonica
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language pt_BR
topic Amazon
Fisheries
Hydroelectric Dam
Environmental Impacts
Ichthiofauna
Rondonia
Amazônia
Pesca
Hidrelétrica
Impacto Ambiental
Letiofauna
Rondônia
spellingShingle Amazon
Fisheries
Hydroelectric Dam
Environmental Impacts
Ichthiofauna
Rondonia
Amazônia
Pesca
Hidrelétrica
Impacto Ambiental
Letiofauna
Rondônia
Santos, Geraldo Mendes dos
Impactos Da Hidrelétrica Samuel Sobre As Comunidades De Peixes Do Rio Jamari (Rondônia, Brasil)
topic_facet Amazon
Fisheries
Hydroelectric Dam
Environmental Impacts
Ichthiofauna
Rondonia
Amazônia
Pesca
Hidrelétrica
Impacto Ambiental
Letiofauna
Rondônia
description The Samuel dam is located 50Km from Porto Velho, Rondônia, on the Jamari river, the first right margintributary of Madeira river, in Brazil. Construction began in April, 1982 and the turbines went on line seven years later. A comparative study of the ichthyofauna was undertaken in the water bodies influenced by the dam, during both pre and pos impoundment phases. The study shows that ichthyofauna was seriously affected by the dam: there was an overall decrease in fish diversity, while a few species increased their numbers, including: Cichlasp. (tucunare), Schizodon fasciatus(aracu comum), Hypophthalmus marginatus(mapará) and Serrasalmus rhombeus(piranha preta). Just below the dam, the population of a small Pimeloclusspecies (mandi) increased. Reduction on dctrilivorous and frugivorous fishes and increase in piscivorous was also observed, The fish communities in the main chanci appear to have been more affected by the dam than the communities of the river marginal lakes. Fishing activity, previously restricted to the Jamari's mouth, now occors intensively in the reservoir, as well, where it constitutesa serious problem for fishery management. These aspects are briefly commented and some options are proposed to guarantee the fish sustainability harvests in the area.", 'en
format Artigo
author Santos, Geraldo Mendes dos
title Impactos Da Hidrelétrica Samuel Sobre As Comunidades De Peixes Do Rio Jamari (Rondônia, Brasil)
title_short Impactos Da Hidrelétrica Samuel Sobre As Comunidades De Peixes Do Rio Jamari (Rondônia, Brasil)
title_full Impactos Da Hidrelétrica Samuel Sobre As Comunidades De Peixes Do Rio Jamari (Rondônia, Brasil)
title_fullStr Impactos Da Hidrelétrica Samuel Sobre As Comunidades De Peixes Do Rio Jamari (Rondônia, Brasil)
title_full_unstemmed Impactos Da Hidrelétrica Samuel Sobre As Comunidades De Peixes Do Rio Jamari (Rondônia, Brasil)
title_sort impactos da hidrelétrica samuel sobre as comunidades de peixes do rio jamari (rondônia, brasil)
publisher Acta Amazonica
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/13099
_version_ 1787141607186759680
score 11.653393

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