We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A field study examining the relative importance of food and water as sources of cadmium for juvenile yellow perch (Perca flavescens).
- Authors
Kraemer, Lisa D.; Campbell, Peter G. C.; Hare, Landis; Auclair, Jean-Christian
- Abstract
To determine the relative importance of water and food as cadmium (Cd) sources for juvenile yellow perch (Perca flavescens, age 1+), fish were caged for up to 30 days in either a reference (Opasatica) or a Cd-contaminated (Dufault) lake and offered prey (zooplankton) from one of these lakes. We established four Cd-exposure regimes: a control, Cd-contaminated water only, Cd-contaminated food only, Cd-contaminated food and water. The 64 µm mesh cages used allowed the free exchange of water with the surrounding lake while retaining the added zooplankton prey for the perch. Cd in the gills and kidney of caged perch was taken up largely from lake water, whereas liver and gut Cd appeared to come from both dietary and aqueous sources. At the subcellular level (liver), the majority of the background Cd in control perch was associated with metal-sensitive fractions (organelles and heat-denatured proteins), whereas in perch exposed to waterborne or diet-borne Cd, the majority of the Cd was found in a metal-detoxified fraction (heat-stable proteins, metallothionein). For perch from all treatment levels, the higher the concentration of hepatic Cd, the greater the proportion of the Cd burden in this organ that was associated with the fraction containing metallothionein-like proteins.
- Subjects
CADMIUM; YELLOW perch; FISHES; ZOOPLANKTON; PROTEINS
- Publication
Canadian Journal of Fisheries & Aquatic Sciences, 2006, Vol 63, Issue 3, p549
- ISSN
0706-652X
- Publication type
Article
- DOI
10.1139/F05-236