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  • 1.
    Brodin, Tomas
    et al.
    Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
    Nordling, Johanna
    Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
    Lagesson, Annelie
    Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
    Klaminder, Jonatan
    Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
    Hellström, Gustav
    Christensen, Bent
    Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
    Fick, Jerker
    Umeå University, Faculty of Science and Technology, Department of Chemistry.
    Environmental relevant levels of a benzodiazepine (oxazepam) alters important behavioral traits in a common planktivorous fish, (Rutilus rutilus)2017In: Journal of Toxicology and Environmental Health, ISSN 1528-7394, E-ISSN 1087-2620, Vol. 80, no 16–18, p. 963-970Article in journal (Refereed)
    Abstract [en]

    Environmental pollution by pharmaceuticals is increasingly recognized as a major threat to aquatic ecosystems worldwide. A complex mix of pharmaceuticals enters waterways via treated wastewater effluent and many remain biochemically active after the drugs reach aquatic systems. However, to date little is known regarding the ecological effects that might arise following pharmaceutical contamination of aquatic environments. One group of particular concern is behaviorally modifying pharmaceuticals as seemingly minor changes in behavior may initiate marked ecological consequences. The aim of this study was to examine the influence of a benzodiazepine anxiolytic drug (oxazepam) on key behavioral traits in wild roach (Rutilus rutilus) at concentrations similar to those encountered in effluent surface waters. Roach exposed to water with high concentrations of oxazepam (280 mu g/L) exhibited increased boldness, while roach at low treatment (0.84 mu g/L) became bolder and more active compared to control fish. Our results reinforce the notion that anxiolytic drugs may be affecting fish behavior in natural systems, emphasizing the need for further research on ecological impacts of pharmaceuticals in aquatic systems and development of new tools to incorporate ecologically relevant behavioral endpoints into ecotoxicological risk assessment.

  • 2.
    Bränberg, Agneta
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Holmgren, Ulf
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Christensen, Bent
    Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
    Eklund, Robert
    Olofsson, Thomas
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Ramstedt, Madeleine
    Umeå University, Faculty of Science and Technology, Department of Chemistry.
    Undervisningens forskningsanknytning: utkast till analysmodell2014In: NU2014: Abstracts, 2014, p. 73-73Conference paper (Refereed)
  • 3. Werding, Bernd
    et al.
    Christensen, Bent
    Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
    Hiller, Alexandra
    Three way symbiosis between a goby, a shrimp, and a crab2016In: Marine Biodiversity, ISSN 1867-1616, E-ISSN 1867-1624, Vol. 46, no 4, p. 897-900Article in journal (Refereed)
    Abstract [en]

    A unique case of triple symbiosis between a goby, a pistol shrimp, and a porcellanid crab sharing the same burrow close to reef patches in Lembeh Strait, Indonesia, is described from direct observations for the first time. The burrow, typically occupied by shrimps and gobies, is shared with the porcellanid Enosteoides lobatus. In the goby-shrimp association, the fish inhabits the burrow, which is constructed and kept clean by the shrimp, and the fish warns the shrimp of potential dangers approaching their refuge. The porcellanid lives in the burrow and also benefits from living in a habitat where it could not survive without the two sentinel species. Because the limiting resource for the suspension-feeding porcellanid is protected space, this liaison is an adaptation by E. lobatus to a symbiotic life in a habitat that protects it from predation, and is optimal for filter feeding.

1 - 3 of 3
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