Jump to main content
Jump to site search

Issue 3, 2004
Previous Article Next Article

Mobilization of aluminium and deposition on fish gills during sea salt episodes – catchment liming as countermeasure

Author affiliations

Abstract

Episodic events may be critical with respect to aluminium (Al) toxicity in moderately acidified salmon rivers. The present work demonstrates that sea salt episodes enhance the toxicity of Al in acidic rivers. The documented sea salt episode (300 µM Cl) mobilized positively charged Al species (0.4 to 1.1 µM Ali), enhanced the Al accumulation on fish gills (0.9 to 10 µmol g−1 dw) and caused increased stress responses (6 to15 mM blood glucose) in fish. Accumulated Al on gills remained high several days after the episode. The presented results are based on a six-week field study in two tributary rivers on the west coast of Norway. Changes in the river water qualities and Al speciation were followed using in situ fractionation techniques. Al accumulation on gills and stress responses were followed for Atlantic salmon (Salmo salar) kept in tanks continually exposed to the changing water quality. The potential mobilization of Al from the two catchments was studied by extracting soils with diluted seawater (salinity of 3). To counteract Al toxicity, one of the tributary catchments has been limed. The potential mobility of Al by sea salt was lower in limed soils compared to acid soils, and the Al deposition on fish gills (<3.5 µmol g−1 dw) and associated stress responses stayed low during the sea salt episode in the river draining the limed catchment. Thus, for acid river systems in coastal areas, catchment liming should be considered as a useful countermeasure for Al toxicity.

Back to tab navigation

Article information


Submitted
14 Nov 2003
Accepted
06 Jan 2004
First published
06 Feb 2004

J. Environ. Monit., 2004,6, 191-200
Article type
Paper

Mobilization of aluminium and deposition on fish gills during sea salt episodes – catchment liming as countermeasure

H. Teien, W. J. F. Standring, B. Salbu, M. Marskar, F. Kroglund and A. Hindar, J. Environ. Monit., 2004, 6, 191
DOI: 10.1039/B314708H

Search articles by author

Spotlight

Advertisements