dc.contributor.author |
Gregory, MA
|
en_US |
dc.contributor.author |
George, RC
|
en_US |
dc.contributor.author |
Marshall, DJ
|
en_US |
dc.contributor.author |
Anandraj, A
|
en_US |
dc.contributor.author |
McClurg, TP
|
en_US |
dc.date.accessioned |
2007-01-20T12:41:16Z |
en_US |
dc.date.accessioned |
2007-06-07T10:02:54Z |
|
dc.date.available |
2007-01-20T12:41:16Z |
en_US |
dc.date.available |
2007-06-07T10:02:54Z |
|
dc.date.copyright |
|
en_US |
dc.date.issued |
1999-01 |
en_US |
dc.identifier.citation |
Gregory, MA, et al. 1999. The effects of mercury exposure on the surface morphology of gill filaments in Perna perna (Mollusca: Bivalvia). Marine Pollution Bulletin, vol. 39, 12 January, pp 116-121 |
en_US |
dc.identifier.issn |
0025-326X |
en_US |
dc.identifier.uri |
http://hdl.handle.net/10204/1430
|
en_US |
dc.identifier.uri |
http://hdl.handle.net/10204/1430
|
|
dc.description.abstract |
This study investigated the possibility that changes in the surface morphology of mussel (Perna perna) gill filaments may be used to indicate the relative toxicity of pollutants in the marine environment. Healthy, adult P. perna were collected and immersed in 2 free-flow tanks. Mercury was added to seawater as it entered tank 1 to achieve a constant level of 50 mu g/1(-1) over 24 days. Uncontaminated sea, water was circulated over the mussels in tank 2 (control) for the same period. A 25 mm (2) area of gill filament was removed from each of the 5 specimens before and after 24 days immersion in tank 2, and after immersion for 1, 2, 4, 8, 16 and 24 days in tank I. These were examined using a scanning electron microscope. The remaining soft tissues from each animal were analysed for mercury using an atomic absorption spectrometer. Mercury concentration increased from 0.13 (pre-immersion) to 87 mu g/g after day 24. Surface morphology remained normal for all animals in tank 2 and for those exposed to Hg for up to 8 days, However, from 16 to 24 days exposure there was a gradual increase in the diameters of microvilli, a depletion of abfrontal cilia, an increase in abnormal, perhaps necrotic cells and an unusual increase in the number of cilia on the lateral surfaces. These results confirm that P. perna is an efficient bio-accumulator and suggest that their gill pathomorphology mag be a useful indicator of toxicity. |
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dc.format.extent |
1676788 bytes |
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dc.format.mimetype |
application/pdf |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Pergamon-Elsevier Science Ltd |
en_US |
dc.rights |
Copyright: 1999 Pergamon-Elsevier Science Ltd |
en_US |
dc.source |
|
en_US |
dc.subject |
Mussels |
en_US |
dc.subject |
Mercury accumulation |
en_US |
dc.subject |
Perna perna |
en_US |
dc.subject |
Scanning electron microscopy |
en_US |
dc.subject |
Surface morphology |
en_US |
dc.subject |
Environmental sciences |
en_US |
dc.title |
The effects of mercury exposure on the surface morphology of gill filaments in Perna perna (Mollusca: Bivalvia) |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Gregory, M., George, R., Marshall, D., Anandraj, A., & McClurg, T. (1999). The effects of mercury exposure on the surface morphology of gill filaments in Perna perna (Mollusca: Bivalvia). http://hdl.handle.net/10204/1430 |
en_ZA |
dc.identifier.chicagocitation |
Gregory, MA, RC George, DJ Marshall, A Anandraj, and TP McClurg "The effects of mercury exposure on the surface morphology of gill filaments in Perna perna (Mollusca: Bivalvia)." (1999) http://hdl.handle.net/10204/1430 |
en_ZA |
dc.identifier.vancouvercitation |
Gregory M, George R, Marshall D, Anandraj A, McClurg T. The effects of mercury exposure on the surface morphology of gill filaments in Perna perna (Mollusca: Bivalvia). 1999; http://hdl.handle.net/10204/1430. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Gregory, MA
AU - George, RC
AU - Marshall, DJ
AU - Anandraj, A
AU - McClurg, TP
AB - This study investigated the possibility that changes in the surface morphology of mussel (Perna perna) gill filaments may be used to indicate the relative toxicity of pollutants in the marine environment. Healthy, adult P. perna were collected and immersed in 2 free-flow tanks. Mercury was added to seawater as it entered tank 1 to achieve a constant level of 50 mu g/1(-1) over 24 days. Uncontaminated sea, water was circulated over the mussels in tank 2 (control) for the same period. A 25 mm (2) area of gill filament was removed from each of the 5 specimens before and after 24 days immersion in tank 2, and after immersion for 1, 2, 4, 8, 16 and 24 days in tank I. These were examined using a scanning electron microscope. The remaining soft tissues from each animal were analysed for mercury using an atomic absorption spectrometer. Mercury concentration increased from 0.13 (pre-immersion) to 87 mu g/g after day 24. Surface morphology remained normal for all animals in tank 2 and for those exposed to Hg for up to 8 days, However, from 16 to 24 days exposure there was a gradual increase in the diameters of microvilli, a depletion of abfrontal cilia, an increase in abnormal, perhaps necrotic cells and an unusual increase in the number of cilia on the lateral surfaces. These results confirm that P. perna is an efficient bio-accumulator and suggest that their gill pathomorphology mag be a useful indicator of toxicity.
DA - 1999-01
DB - ResearchSpace
DP - CSIR
KW - Mussels
KW - Mercury accumulation
KW - Perna perna
KW - Scanning electron microscopy
KW - Surface morphology
KW - Environmental sciences
LK - https://researchspace.csir.co.za
PY - 1999
SM - 0025-326X
T1 - The effects of mercury exposure on the surface morphology of gill filaments in Perna perna (Mollusca: Bivalvia)
TI - The effects of mercury exposure on the surface morphology of gill filaments in Perna perna (Mollusca: Bivalvia)
UR - http://hdl.handle.net/10204/1430
ER -
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en_ZA |