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Histological alterations in the Antarctic cod, Trematomus bernacchii from Davis Station, East Antarctica
conference contribution
posted on 2011-01-01, 00:00 authored by Trish Corbett, Julie MondonJulie Mondon, C KingDuring the summer season 2009/10, a comprehensive environmental impact assessment of the sewage discharge was conducted at Davis Station in the Vestfold Hills region of East Antarctica. As part of this project, a survey of the histology of liver, gill, gonad and muscle tissues in the Antarctic rock cod Trematomus bernacchii from nearshore sites in the receiving environment close to Davis Station in was completed. Fish from 4 sites were examined; 1 site adjacent to the Davis Station sewage outfall (within 500 m of the point of discharge), 2 sites approximately 2 km from the outfall (Anchorage Island and Antennae farm), and 1 site approximately 10 km away from the outfall and adjacent to an Adelie penguin population (Kazak Island). All fish sampled from the sewage outfall site exhibited significant histological alterations in all major tissues. Fish from the other 3 sites showed some alterations in either gill and/or liver tissues. Pathological abnormalities present in all fish collected near the sewage outfall included: extensive multifocal cysts of unknown etiology with necrotic liquification; multifocal granuloma with associated inflammation; coagulative necrosis in the liver; and lamellar hyperplasia with associated proliferation and lamella fusion of the gills. Results of this work form part of a weight of evidence approach alongside ecological monitoring, chemical analysis, ecotoxicological testing and dispersal modelling of the discharge plume which is being used to inform and direct upgrades to the Australian Antarctic Divisions operations and current sewage discharge practises at Davis Station.
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Event
Enviro Tox (2011 : Darwin, N.T.)Pagination
61 - 62Publisher
SETAC-AULocation
Darwin, N.T.Place of publication
[Darwin, N.T.]Start date
2011-04-17End date
2011-04-20Language
engPublication classification
E2 Full written paper - non-refereed / Abstract reviewedTitle of proceedings
Enviro Tox 2011 : Sharing knowledge for a healthier environmentUsage metrics
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