Preliminary investigations of toxicity in the Georges Bay catchment, Tasmania, Australia
North-eastern Tasmania, Australia has been an area of major production for Pacific oysters (Crassostrea gigas) for over 25 years. Since the mid-1990s, increased oyster mortality has been observed. The purpose of the present study was to identify the agent causing aquatic toxicity and to investigate...
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ftpubmed:oai:pubmedcentral.nih.gov:4337740 2023-05-15T15:58:38+02:00 Preliminary investigations of toxicity in the Georges Bay catchment, Tasmania, Australia Bleaney, Alison Hickey, Christopher W. Stewart, Michael Scammell, Marcus Senjen, Rye 2015-01-02 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4337740 https://doi.org/10.1080/00207233.2014.988550 en eng Routledge http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://dx.doi.org/10.1080/00207233.2014.988550 © 2015 The Author(s). Published by Routledge This is an Open Access article. Non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly attributed, cited, and is not altered, transformed, or built upon in any way, is permitted. The moral rights of the named author(s) have been asserted. Articles Text 2015 ftpubmed https://doi.org/10.1080/00207233.2014.988550 2015-03-08T01:17:59Z North-eastern Tasmania, Australia has been an area of major production for Pacific oysters (Crassostrea gigas) for over 25 years. Since the mid-1990s, increased oyster mortality has been observed. The purpose of the present study was to identify the agent causing aquatic toxicity and to investigate whether there is a chemical and/or toxicological link between river foam and monoculture timber plantation forests of exotic eucalypts (Eucalyptus nitens) present in the catchment area. Foam samples from the George River catchment demonstrated high toxicity to a freshwater cladoceran and larvae of a marine blue mussel species. After filtration to remove most particulates, foam samples also demonstrated a marked reduction in toxicity to blue mussels, which suggested that the toxicity is particle associated. Foam and leaf extracts of E. nitens were then fractionated using HPLC and size exclusion chromatography and the resulting fractions were screened for cladoceran and blue mussel toxicity. Toxicity was detected in fractions common to both the foam and the leaf extracts. This study suggests that there may be a chemical and toxicological relationship between foam and E. nitens leaf components. Text Crassostrea gigas PubMed Central (PMC) Pacific International Journal of Environmental Studies 72 1 1 23 |
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Articles Bleaney, Alison Hickey, Christopher W. Stewart, Michael Scammell, Marcus Senjen, Rye Preliminary investigations of toxicity in the Georges Bay catchment, Tasmania, Australia |
topic_facet |
Articles |
description |
North-eastern Tasmania, Australia has been an area of major production for Pacific oysters (Crassostrea gigas) for over 25 years. Since the mid-1990s, increased oyster mortality has been observed. The purpose of the present study was to identify the agent causing aquatic toxicity and to investigate whether there is a chemical and/or toxicological link between river foam and monoculture timber plantation forests of exotic eucalypts (Eucalyptus nitens) present in the catchment area. Foam samples from the George River catchment demonstrated high toxicity to a freshwater cladoceran and larvae of a marine blue mussel species. After filtration to remove most particulates, foam samples also demonstrated a marked reduction in toxicity to blue mussels, which suggested that the toxicity is particle associated. Foam and leaf extracts of E. nitens were then fractionated using HPLC and size exclusion chromatography and the resulting fractions were screened for cladoceran and blue mussel toxicity. Toxicity was detected in fractions common to both the foam and the leaf extracts. This study suggests that there may be a chemical and toxicological relationship between foam and E. nitens leaf components. |
format |
Text |
author |
Bleaney, Alison Hickey, Christopher W. Stewart, Michael Scammell, Marcus Senjen, Rye |
author_facet |
Bleaney, Alison Hickey, Christopher W. Stewart, Michael Scammell, Marcus Senjen, Rye |
author_sort |
Bleaney, Alison |
title |
Preliminary investigations of toxicity in the Georges Bay catchment, Tasmania, Australia |
title_short |
Preliminary investigations of toxicity in the Georges Bay catchment, Tasmania, Australia |
title_full |
Preliminary investigations of toxicity in the Georges Bay catchment, Tasmania, Australia |
title_fullStr |
Preliminary investigations of toxicity in the Georges Bay catchment, Tasmania, Australia |
title_full_unstemmed |
Preliminary investigations of toxicity in the Georges Bay catchment, Tasmania, Australia |
title_sort |
preliminary investigations of toxicity in the georges bay catchment, tasmania, australia |
publisher |
Routledge |
publishDate |
2015 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4337740 https://doi.org/10.1080/00207233.2014.988550 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://dx.doi.org/10.1080/00207233.2014.988550 |
op_rights |
© 2015 The Author(s). Published by Routledge This is an Open Access article. Non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly attributed, cited, and is not altered, transformed, or built upon in any way, is permitted. The moral rights of the named author(s) have been asserted. |
op_doi |
https://doi.org/10.1080/00207233.2014.988550 |
container_title |
International Journal of Environmental Studies |
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72 |
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1 |
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1 |
op_container_end_page |
23 |
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1766394400254984192 |