1. Editorial

   • David Peakall
   • Lee Shugart

   Editorial Introduction Pages: 135 - 135

2. Test Designs to Assess the Influence of Soil Characteristics on the Toxicity of Copper and Lead to the Oligochaete Enchytraeus albidus

   • Koen Lock
   • Colin R. Janssen

   OriginalPaper Pages: 137 - 144

3. Responses of Chub (Leuciscus cephalus) Populations to Chemical Stress, Assessed by Genetic Markers, DNA Damage and Cytochrome P4501A Induction

   • Valérie Larno
   • Jean Laroche
   • Alain Devaux

   OriginalPaper Pages: 145 - 158

4. The Potential Use of the South African River Crab, Potamonautes warreni, as a Bioindicator Species for Heavy Metal Contamination

   • P.-Manuela M. Schuwerack
   • John W. Lewis
   • Peter Jones

   OriginalPaper Pages: 159 - 166

5. 2,3,7,8-Tetrachlorodibenzo-p-Dioxin Affects Size and Shape, But Not Asymmetry, of Mandibles in Mice

   • Desiree E. Allen
   • Larry J. Leamy

   OriginalPaper Pages: 167 - 176

6. Why Short-Term Bioassays Are Not Meaningful—Effects of a Pesticide (Imidacloprid) and a Metal (Cadmium) on Pea Aphids (Acyrthosiphon pisum Harris)

   • Ryszard Laskowski

   OriginalPaper Pages: 177 - 183

7. Trace Metal Toxicity to Phytoplankton of Kuwait Coastal Waters

   • A. H. Bu-Olayan
   • R. Al-Hassan
   • B. V. Thomas

   OriginalPaper Pages: 185 - 189

8. Book Reviews

   BookReview Pages: 191 - 193