Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea)

Detalhes bibliográficos
Autor(a) principal: Leão, Janaina de Castro
Data de Publicação: 2010
Outros Autores: Giordano, Sheila Bueno, Yunes, João Sarkis
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da FURG (RI FURG)
Texto Completo: http://repositorio.furg.br/handle/1/447
Resumo: Microcystins (MCYST), common cyanobacterial hepatotoxins, have been observed in the Patos Lagoon and the estuary over the last three decades. Anthropogenic pollution associated to the environmental features has promoted the frequent occurrence of cyanobacterial blooms in this environment. The present work aimed to evaluate the MCYST uptake by the filter-feeding mollusk Mesodesma mactroides Deshayes, 1854, which occurs in the nearby coasts of the Patos Lagoon estuary, Brazil. Bioassays were carried out using the toxic strain Microcystis aeruginosa RST9501, isolated from the Patos Lagoon estuary. Clams were exposed to live cells of this toxic cyanobacterium for 12 days, taking up MCYST to a maximum of 5.27±0.23 μg MCYST.g-1 (dry hepatopancreas weight). Since several blooms reaching the Patos Lagoon estuary and the nearby areas are observed, these results indicate that the toxins from M. aeruginosa blooms can be accumulated by this filter-feeding animal, making it a potential vector to the local trophic web
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spelling Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea)Retenção de microcistinas pelo marisco Mesodesma mactroides (Bivalvia, Mactroidea)Patos LagoonMicrocystisMicrocystinMesodesmaBioaccumulationLagoa dos PatosBioacumulaçãoMicrocistinaMesodesmaMicrocystins (MCYST), common cyanobacterial hepatotoxins, have been observed in the Patos Lagoon and the estuary over the last three decades. Anthropogenic pollution associated to the environmental features has promoted the frequent occurrence of cyanobacterial blooms in this environment. The present work aimed to evaluate the MCYST uptake by the filter-feeding mollusk Mesodesma mactroides Deshayes, 1854, which occurs in the nearby coasts of the Patos Lagoon estuary, Brazil. Bioassays were carried out using the toxic strain Microcystis aeruginosa RST9501, isolated from the Patos Lagoon estuary. Clams were exposed to live cells of this toxic cyanobacterium for 12 days, taking up MCYST to a maximum of 5.27±0.23 μg MCYST.g-1 (dry hepatopancreas weight). Since several blooms reaching the Patos Lagoon estuary and the nearby areas are observed, these results indicate that the toxins from M. aeruginosa blooms can be accumulated by this filter-feeding animal, making it a potential vector to the local trophic webAs microcistinas (MCYST), hepatotoxinas produzidas por cianobactérias, tem sido encontradas na Lagoa dos Patos e seu estuário ao longo dos últimos trinta anos. A poluição antropogênica associada com as características ambientais locais tem favorecido a ocorrência de florações de cianobactérias nesse ambiente. O presente trabalho teve como objetivo avaliar a assimilação de MCYST pelo molusco filtrador Mesodesma mactroides Deshayes,1854, que ocorre na costa adjacente ao estuário da Lagoa dos Patos, Brasil. Experimentos em laboratório foram realizados utilizando uma cepa tóxica da espécie Microcystis aeruginosa RST9501, isolada do estuário da lagoa dos Patos. Os mariscos foram expostos a células vivas da cianobactéria tóxica durante 12 dias, apresentando um valor máximo de retenção de 5,27±0,23 μg MCYST.g-1 (peso seco do hepatopâncreas). Uma vez que diversas florações contendo M. aeruginosa atingindo o estuário da Lagoa dos Patos e áreas costeiras são observadas, os resultados indicam que essas toxinas, comuns nessas florações, podem ser acumuladas por esse animal filtrador, tornando-o um potencial vetor para a teia trófica local2011-04-20T16:46:41Z2011-04-20T16:46:41Z2010info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfLEÃO, Janaina de Castro; GIORDANO, Sheila Bueno; YUNES , João Sarkis. Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea). Rio Grande, v. 32, n. 1, p. 79-85, 2010. Disponível em: < http://www.seer.furg.br/ojs/index.php/atlantica/article/view/1554/691> Acesso em: 19 abr 2011.0102-1656http://repositorio.furg.br/handle/1/447engLeão, Janaina de CastroGiordano, Sheila BuenoYunes, João Sarkisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURG2011-08-05T04:32:23Zoai:repositorio.furg.br:1/447Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2011-08-05T04:32:23Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false
dc.title.none.fl_str_mv Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea)
Retenção de microcistinas pelo marisco Mesodesma mactroides (Bivalvia, Mactroidea)
title Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea)
spellingShingle Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea)
Leão, Janaina de Castro
Patos Lagoon
Microcystis
Microcystin
Mesodesma
Bioaccumulation
Lagoa dos Patos
Bioacumulação
Microcistina
Mesodesma
title_short Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea)
title_full Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea)
title_fullStr Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea)
title_full_unstemmed Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea)
title_sort Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea)
author Leão, Janaina de Castro
author_facet Leão, Janaina de Castro
Giordano, Sheila Bueno
Yunes, João Sarkis
author_role author
author2 Giordano, Sheila Bueno
Yunes, João Sarkis
author2_role author
author
dc.contributor.author.fl_str_mv Leão, Janaina de Castro
Giordano, Sheila Bueno
Yunes, João Sarkis
dc.subject.por.fl_str_mv Patos Lagoon
Microcystis
Microcystin
Mesodesma
Bioaccumulation
Lagoa dos Patos
Bioacumulação
Microcistina
Mesodesma
topic Patos Lagoon
Microcystis
Microcystin
Mesodesma
Bioaccumulation
Lagoa dos Patos
Bioacumulação
Microcistina
Mesodesma
description Microcystins (MCYST), common cyanobacterial hepatotoxins, have been observed in the Patos Lagoon and the estuary over the last three decades. Anthropogenic pollution associated to the environmental features has promoted the frequent occurrence of cyanobacterial blooms in this environment. The present work aimed to evaluate the MCYST uptake by the filter-feeding mollusk Mesodesma mactroides Deshayes, 1854, which occurs in the nearby coasts of the Patos Lagoon estuary, Brazil. Bioassays were carried out using the toxic strain Microcystis aeruginosa RST9501, isolated from the Patos Lagoon estuary. Clams were exposed to live cells of this toxic cyanobacterium for 12 days, taking up MCYST to a maximum of 5.27±0.23 μg MCYST.g-1 (dry hepatopancreas weight). Since several blooms reaching the Patos Lagoon estuary and the nearby areas are observed, these results indicate that the toxins from M. aeruginosa blooms can be accumulated by this filter-feeding animal, making it a potential vector to the local trophic web
publishDate 2010
dc.date.none.fl_str_mv 2010
2011-04-20T16:46:41Z
2011-04-20T16:46:41Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv LEÃO, Janaina de Castro; GIORDANO, Sheila Bueno; YUNES , João Sarkis. Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea). Rio Grande, v. 32, n. 1, p. 79-85, 2010. Disponível em: < http://www.seer.furg.br/ojs/index.php/atlantica/article/view/1554/691> Acesso em: 19 abr 2011.
0102-1656
http://repositorio.furg.br/handle/1/447
identifier_str_mv LEÃO, Janaina de Castro; GIORDANO, Sheila Bueno; YUNES , João Sarkis. Microcystins uptake by the yellow clam Mesodesma mactroides (Bivalvia, Mactroidea). Rio Grande, v. 32, n. 1, p. 79-85, 2010. Disponível em: < http://www.seer.furg.br/ojs/index.php/atlantica/article/view/1554/691> Acesso em: 19 abr 2011.
0102-1656
url http://repositorio.furg.br/handle/1/447
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da FURG (RI FURG)
instname:Universidade Federal do Rio Grande (FURG)
instacron:FURG
instname_str Universidade Federal do Rio Grande (FURG)
instacron_str FURG
institution FURG
reponame_str Repositório Institucional da FURG (RI FURG)
collection Repositório Institucional da FURG (RI FURG)
repository.name.fl_str_mv Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)
repository.mail.fl_str_mv
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