Ecotoxicology

, Volume 4, Issue 2, pp 91–113 | Cite as

Spatial and temporal variability in lipid dynamics of common amphipods: assessing the potential for uptake of lipophilic contaminants

  • Michael T. Arts
  • M. E. Ferguson
  • N. E. Glozier
  • R. D. Robarts
  • D. B. Donald
Papers

A three-tiered approach involving autoradiography, measurement of seasonal lipid patterns and deployment of in situ microcosms, was used to assess the potential of the moderately lipophilic herbicide triallate to accumulate in two amphipod species (Hyalella azteca and Gammarus lacustris) in two prairie lakes and one prairie pond. Autoradiography revealed that the storage sites for triallate in amphipod tissues were associated with lipid-rich tissues, in particular, with triacylglycerol storage sites and the nervous system. Seasonal lipid patterns (total lipid) of amphipods did not differ amongst sites within a waterbody, however, there were marked differences amongst water bodies. Female amphipods had higher lipid contents than males during the reproductive period in early summer but this difference diminished later in the summer. Bioaccumulation factors of triallate in amphipod tissues ranged from 72 to 80 times the nominal water concentrations in 7 day microcosm trials. Triacylglycerol content and triallate body burden were positively correlated (r2=0.58–0.91) for H. azteca in the two lakes in which the microcosms were deployed. However, no significant correlations were obtained between triacylglycerol content and triallate body burden for G. lacustris. Triacylglycerol contents in the amphipods were generally highest in spring and autumn, coinciding with application times for triallate.

Keywords

amphipods triallate lipids prairie autoradiography herbicide 

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • Michael T. Arts
    • 1
  • M. E. Ferguson
    • 1
  • N. E. Glozier
    • 1
  • R. D. Robarts
    • 1
  • D. B. Donald
    • 2
  1. 1.Environmental Sciences DivisionNational Hydrology Research InstituteSaskatoonCanada
  2. 2.Ecosystem Quality Division, Prairie and Northern RegionEnvironmental Canada Park PlazaReginaCanada

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