Mercury levels in fish of Trombetas River, lower Amazon: an area out of gold mining influence
The bioaccumulation of Hg in fish of different feeding habits was evaluated in the Trombetas River, tributary of the Amazon River, in an area without records of gold mining. The objectives of the present study was to generate information on Hg concentrations in the main fish species consumed in t...
| Autor principal: | Faial, Kleber Raimundo Freitas |
|---|---|
| Outros Autores: | Santos, Elisabeth Concei??o de Oliveira, Brabo, Edilson da Silva, S? Filho, Greg?rio Carrera, Jesus, Iracina Maura de, Lima, Marcelo de Oliveira, Rocha, Carmen Silvia G |
| Grau: | Resumo Apresentado em Evento |
| Idioma: | eng |
| Publicado em: |
2016
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| Assuntos: | |
| Acesso em linha: |
http://patua.iec.gov.br/handle/iec/1427 |
| id |
ir-iec-1427 |
|---|---|
| recordtype |
dspace |
| spelling |
ir-iec-14272018-12-11T19:18:48Z Mercury levels in fish of Trombetas River, lower Amazon: an area out of gold mining influence Faial, Kleber Raimundo Freitas Santos, Elisabeth Concei??o de Oliveira Brabo, Edilson da Silva S? Filho, Greg?rio Carrera Jesus, Iracina Maura de Lima, Marcelo de Oliveira Rocha, Carmen Silvia G Intoxica??o por Merc?rio / complica??es Intoxica??o por Merc?rio / preven??o & controle Peixes Rio Trombetas (PA) The bioaccumulation of Hg in fish of different feeding habits was evaluated in the Trombetas River, tributary of the Amazon River, in an area without records of gold mining. The objectives of the present study was to generate information on Hg concentrations in the main fish species consumed in this area, provide a database with information from other Amazonian basins, and to establish normal values for the region. The fish samples were obtained and identified with popular and scientific names with the aid of local fishermen. The Hg analyses were carried out by atomic absorption spectrometry with generation system of Hg cold vapor after acid digestion. The species were divided in five groups and the Hg concentrations varied widely with the position occupied in the trophic chain and the food habito Higher values were found in the carnivorous and piscivorous fish with Hg mean concentrations of 0.218 ug/g (muge 0.047-0.875 ug/g) and 0.357 ug/g (range 0.036-1.336 ug/g), respectively. To elucidate the origin ofHg in this fish species and the possibility of exposure of resident populations in this area is necessary to consider, among other factors, the migratory characteristics of different fish species and aspects of the aquatic ecosystem, including bottom sediments, suspense particles, water, and geological substratum. In this study, it was found Hg levels in fish above the expected, indicating that an extensive search for the origins ofthis metal should be carried in Amazon ecosystems. These studies should clarify to Amazon populations if they are or not exposed to Hg. Moreover, it is necessary to include the monitoring of Hg concentrations in fish consumed by the Amazon populations in surveillance health programs and to implement programs of environmental education comprising the selective consumption of fish. 2016-01-26T13:36:09Z 2016-01-26T13:36:09Z 2003 Resumo Apresentado em Evento FAIAL, Kleber Raimundo F. et al. Mercury levels in fish of Trombetas River, lower Amazon: an area out of gold mining influence. In: INTERNATIONAL WORKSHOP ON HEALTH AND ENVIRONMENTAL EFFECTS OF MERCURY - Impacts of Mercury in South and Central America, 2003, Bel?m. Proceedings... Bel?m: Universidade Federal do Par?, 2003. p. 239-249. http://patua.iec.gov.br/handle/iec/1427 eng Acesso Aberto application/pdf application/pdf |
| institution |
Instituto Evandro Chagas (IEC) |
| collection |
PATUA |
| language |
eng |
| topic |
Intoxica??o por Merc?rio / complica??es Intoxica??o por Merc?rio / preven??o & controle Peixes Rio Trombetas (PA) |
| spellingShingle |
Intoxica??o por Merc?rio / complica??es Intoxica??o por Merc?rio / preven??o & controle Peixes Rio Trombetas (PA) Faial, Kleber Raimundo Freitas Mercury levels in fish of Trombetas River, lower Amazon: an area out of gold mining influence |
| topic_facet |
Intoxica??o por Merc?rio / complica??es Intoxica??o por Merc?rio / preven??o & controle Peixes Rio Trombetas (PA) |
| description |
The bioaccumulation of Hg in fish of different feeding habits was evaluated in the Trombetas
River, tributary of the Amazon River, in an area without records of gold mining. The objectives of
the present study was to generate information on Hg concentrations in the main fish species
consumed in this area, provide a database with information from other Amazonian basins, and to
establish normal values for the region. The fish samples were obtained and identified with popular
and scientific names with the aid of local fishermen. The Hg analyses were carried out by atomic
absorption spectrometry with generation system of Hg cold vapor after acid digestion. The species
were divided in five groups and the Hg concentrations varied widely with the position occupied in
the trophic chain and the food habito Higher values were found in the carnivorous and piscivorous
fish with Hg mean concentrations of 0.218 ug/g (muge 0.047-0.875 ug/g) and 0.357 ug/g (range
0.036-1.336 ug/g), respectively. To elucidate the origin ofHg in this fish species and the possibility
of exposure of resident populations in this area is necessary to consider, among other factors, the
migratory characteristics of different fish species and aspects of the aquatic ecosystem, including
bottom sediments, suspense particles, water, and geological substratum. In this study, it was found
Hg levels in fish above the expected, indicating that an extensive search for the origins ofthis metal
should be carried in Amazon ecosystems. These studies should clarify to Amazon populations if
they are or not exposed to Hg. Moreover, it is necessary to include the monitoring of Hg
concentrations in fish consumed by the Amazon populations in surveillance health programs and to
implement programs of environmental education comprising the selective consumption of fish. |
| format |
Resumo Apresentado em Evento |
| author |
Faial, Kleber Raimundo Freitas |
| author2 |
Santos, Elisabeth Concei??o de Oliveira Brabo, Edilson da Silva S? Filho, Greg?rio Carrera Jesus, Iracina Maura de Lima, Marcelo de Oliveira Rocha, Carmen Silvia G |
| author2Str |
Santos, Elisabeth Concei??o de Oliveira Brabo, Edilson da Silva S? Filho, Greg?rio Carrera Jesus, Iracina Maura de Lima, Marcelo de Oliveira Rocha, Carmen Silvia G |
| title |
Mercury levels in fish of Trombetas River, lower Amazon: an area out of gold mining influence |
| title_short |
Mercury levels in fish of Trombetas River, lower Amazon: an area out of gold mining influence |
| title_full |
Mercury levels in fish of Trombetas River, lower Amazon: an area out of gold mining influence |
| title_fullStr |
Mercury levels in fish of Trombetas River, lower Amazon: an area out of gold mining influence |
| title_full_unstemmed |
Mercury levels in fish of Trombetas River, lower Amazon: an area out of gold mining influence |
| title_sort |
mercury levels in fish of trombetas river, lower amazon: an area out of gold mining influence |
| publishDate |
2016 |
| url |
http://patua.iec.gov.br/handle/iec/1427 |
| _version_ |
1717584387091988480 |
| score |
11.755432 |