Sediment bioaccumulation test with Lumbriculus variegatus: effects of feeding

Archives of Environmental Contamination and Toxicology
Lawrence P BurkhardCarol B Grabanski

Abstract

Standard sediment-bioaccumulation test methods specify that Lumbriculus variegatus should not be fed during the 28-day exposure. This lack of feeding can lead to decreases in L. variegatus weight and lipid content during the 28-day exposure period. Differences in intrinsic nutritional content of sediments could lead to additional variability in organism performance and/or contaminant uptake. To evaluate the potential benefits of feeding, sediment-bioaccumulation tests were performed comparing treatments with and without supplemental feeding with tropical fish food and also comparing performance food introduced as blended slurry versus fine flakes. The ration of food provided had to be limited to 6 mg/300-mL beaker with 250 mg of L. variegatus (ww) receiving three feedings per week to maintain acceptable dissolved oxygen (DO) in the test chambers. Relative weight change during exposure varied across sediments in the absence of food from very little change to as much as a 40 % decrease from starting weight. Feeding slurry and flake foods increased the total weight of recovered organisms by 32 and 48 %, respectively, but they did not decrease variability in weight changes across sediments. Lipid contents of the organisms decreased...Continue Reading

References

Jun 1, 1996·Journal of Pharmacological and Toxicological Methods·L CaprinoG Togna
Jul 19, 2011·Environmental Science & Technology·Steven B HawthorneHans Peter H Arp

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Citations

May 12, 2016·Archives of Environmental Contamination and Toxicology·Lawrence P BurkhardTeresa J Norberg-King
Aug 29, 2018·Archives of Environmental Contamination and Toxicology·Lawrence P BurkhardTeresa J Norberg-King
Mar 18, 2021·Archives of Environmental Contamination and Toxicology·Lawrence P BurkhardTeresa J Norberg-King
Apr 14, 2021·Environmental Science and Pollution Research International·María L MartínezNoemí R Verrengia Guerrero

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