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| 2. |
- Ek, Helene, 1976, et al.
(författare)
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Kustfisk hälsa - abborrens hälsotillstånd
- 2006
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Ingår i: Bottniska Viken -årsrapport från den marina miljöövervakningen 2005. - 1400-2760. ; 2005, s. 21-22
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 3. |
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| 4. |
- Ek, Helene, 1976, et al.
(författare)
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Tentative biomarkers for 2,4,6-trinitrotoluene (TNT) in fish (Oncorhynchus mykiss)
- 2005
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Ingår i: Aquatic Toxicology. - : Elsevier BV. - 0166-445X .- 1879-1514. ; 72:3, s. 221-230
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Tidskriftsartikel (refereegranskat)abstract
- 2,4,6-Trinitrotoluene (TNT) is the major explosive in ammunition dumped into lakes and the sea after World War II. To identify useful biomarkers of TNT-exposure for forthcoming fish monitoring studies at ammunition dumping sites, rainbow trout (Oncorhynchus mykiss) were intraperitoneal (i.p.) injected with TNT in peanut oil at doses of 0, 100, 200 or 400 mg TNT/kg body weight and sampled 72 h later. The study covered blood parameters, and hepatic antioxidant and detoxifying enzymes. Fish treated with TNT had an increased glutathione S-transferase (GST) activity and glutathione reductase (GR) activity, and a decreased percentage of oxidised glutathione (%GSSG) compared to the control group. In addition to increased methemoglobin, the increased glutathione and glutathione dependent enzyme activities indicate that TNT oxidises macromolecules and activates antioxidant defence systems which may be useful as general biomarkers of TNT-exposure. The fish bile was analysed for TNT and its metabolites by gas chromatography-mass spectrometry (GC-MS), and the toxicity of the bile was determined with the cladoceran Ceriodaphnia dubia. A dose-dependent increase in TNT, 2-amino-4,6-dinitrotoluene (2-ADNT) and 4-amino-2,6-dinitrotoluene (4-ADNT) was found in the hydrolysed bile of the TNT-treated fish. These results indicate that the fish are able to detoxify and excrete TNT and suggest that the detection of TNT, 2-ADNT and 4-ADNT in bile may be suitable as a direct marker of exposure to TNT. (c) 2005 Elsevier B.V. All rights reserved.
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| 5. |
- Larsson, Åke, 1944, et al.
(författare)
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Hälsotillståndet hos abborre och tånglake
- 2007
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Ingår i: Havet 2007 - om miljötillståndet i svenska havsområden. - 1654-6741. ; 2007, s. 100-102
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Inom den nationalla marina kustfiskövervakningen har känsliga biomarkörer använts sedan 1988 för att kartlägga hälsotillståndet hos fisk. Här redovisas undersökningar på abborre och tånglake för de områden som har de längsta tidsserierna. De flesta biomarkörerna indikerar en god hälsostatus. Några erhållna mätdata talar dock för att fisken är påverkad av en ökad exponering för något eller några miljögifter. Detta kan vara tidiga tecken på på miljöförändringar som på sikt kan få allvarliga konsekvenser för fiskpopulationer i våra kustområden.
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| 6. |
- Larsson, Åke, 1944, et al.
(författare)
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Kustfisk hälsa
- 2005
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Ingår i: Bottniska viken - årsrapport från den marina miljöövervakningen 2004. - 1400-2760. ; :2004, s. 24-26
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 7. |
- Sandstrom, O., et al.
(författare)
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Three decades of Swedish experience demonstrates the need for integrated long-term monitoring of fish in marine coastal areas
- 2005
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Ingår i: Water Quality Research Journal of Canada. - 1201-3080. ; 40:3, s. 233-250
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Tidskriftsartikel (refereegranskat)abstract
- The first attempts to monitor coastal fish in Sweden were made in the 1960s and 1970s. Ecological, physiological, biochemical and environmental chemistry data were collected in separate projects. When the National Marine Monitoring Programme was revised in 1992, a new strategy was introduced for assessments of long-term trends in coastal fish communities. Annual integrated monitoring of contaminants, biomarkers and population and community indicators of ecosystem health was started in selected areas using common sentinel species. Data from one monitoring area at the coast of the Baltic proper are analyzed in this paper. The results have shown a shift in fish community structure indicating changes in ecosystem productivity. Trends have been detected in growth rate (positive) and relative gonad size (negative) in perch (Perca fluviatilis), suggesting a metabolic disturbance according to the predictive response model developed for interpretations. One factor which may have contributed to the reduced GSI was a decrease in mean age of sampled fish during the period of study. Chemical exposure was indicated by a 3-fold increase of EROD activity during the monitored 15-year period. However, concentrations of most measured contaminants in perch have decreased during the same period. The experience of the integrated approach has shown that a tentative analysis of cause and environmental significance could be made, improving the assessment, but there still remain unsolved questions to be answered in follow-up studies. The analysis has also shown the importance of long-term monitoring at several levels of biological organization to distinguish between natural variation and low-level effects on ecosystems.
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| 8. |
- Sandström, Olof, et al.
(författare)
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Integrated fish monitoring in Sweden
- 2003
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Ingår i: Utredningsrapport till Naturvårdsverket. ; , s. 1-32
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Rapport (övrigt vetenskapligt/konstnärligt)
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