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  • 1.
    Hansson, T.
    et al.
    Department of Applied Environmental Science (ITM), Stockholm University, 10691 Stockholm, Sweden .
    Hansen, Wenche
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. Environmental Protection Unit, Länsstyrelsen Västernorrland, 87127 Härnösand, Sweden .
    Tjärnlund, U.
    Department of Applied Environmental Science (ITM), Stockholm University, 10691 Stockholm, Sweden .
    Balk, L.
    Department of Applied Environmental Science (ITM), Stockholm University, 10691 Stockholm, Sweden .
    Bengtsson, B. -E
    Department of Applied Environmental Science (ITM), Stockholm University, 10691 Stockholm, Sweden .
    Biomarker investigations in adult female perch (Perca fluviatilis) from industrialised areas in northern Sweden in 20032014In: Archives of Environmental Contamination and Toxicology, ISSN 0090-4341, E-ISSN 1432-0703, Vol. 66, no 2, p. 237-247Article in journal (Refereed)
    Abstract [en]

    Since the new millennium, a notion has developed in certain parts of society that environmental pollutants and their associated effects are under control. The primary objective of this investigation, performed in 2003, was to test whether this was actually the case in an industrialised region in the County of Västernorrland in northern Sweden with well-documented environmental pollution from past and present activities. This was performed by measuring a moderate battery of simple biomarkers in adult female perch at several stations. The point sources included sewage-treatment plants, pulp and paper mills, as well as other industries. The biomarkers included growth, somatic indices, gonad maturation status, gonad pigmentation, fin erosion, skin ulcers, and ethoxyresorufin-O-deethylase (EROD) activity in the liver. The results showed that the environmental pollutants and their associated effects were not under control. In fact, the health of the perch was impaired at all of the polluted stations. Many responses were unspecific with respect to underlying cause, whereas some effects on EROD activity and gonad maturation status were attributed to historical creosote pollution and current kraft pulp mill effluents, respectively. The data presented may also be used as reference values for future investigations of health effects in perch. © Springer Science+Business Media 2013.

  • 2.
    Pettersson, Madonna
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Ekelund, Nils GA
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Effects of the herbicides roundup and avans on Euglena gracilis2006In: Archives of Environmental Contamination and Toxicology, ISSN 0090-4341, E-ISSN 1432-0703, Vol. 50, no 2, p. 175-181Article in journal (Refereed)
    Abstract [en]

    Glyphosate is the active ingredient in a range of widely used herbicides. The aim of this work is to evaluate the effects of two commercial herbicides, Roundup and Avans, on the motility, velocity, and gravitactic orientation of the aquatic flagellate Euglena gracilis. An early warning system, called ECOTOX, has been used for monitoring the different parameters of movement. The motility was not affected by Roundup and Avans after short period tests (0, 30, and 60 s). However, gravitactic orientation of the cells was affected at concentrations of 1.25 g l(-1) and above when treated with Avans, whereas treatments with Roundup showed no specific changes after short period tests. Velocity of the cells was affected by both herbicides, but the effects of Avans were shown to occur at lower concentrations in comparison to Roundup. Avans showed lower no observable effect concentration (NOEC) values in comparison to Roundup for the different parameters after short period tests. After long period (7 days) tests, NOEC values were similar except for the upward swimming, where Avans had a NOEC value of 100 mu g l(-1) and Roundup 200 mu g l(-1). The results demonstrate that Avans containing trimethylsulfonium salt of glyphosate is more toxic to E. gracilis than Roundup, which contained isopropylamine salt of glyphosate.

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