1. Trace elements in crayfish: Regional differences and changes induced by cooking

   • L. Jorhem
   • J. Engman
   • A. M. Thim

   OriginalPaper Pages: 137 - 142

2. Chronic toxicity of cadmium to Chironomus riparius (Diptera: Chironomidae) at different food levels

   • J. F. Postma
   • M. C. Buckert-de Jong
   • C. Davids

   OriginalPaper Pages: 143 - 148

3. Acute and chronic exposure of Dunaliella salina and Chlamydomonas bullosa to copper and cadmium: Effects on growth

   • I. Visviki
   • J. W. Rachlin

   OriginalPaper Pages: 149 - 153

4. Acute and chronic exposure of Dunaliella salina and Chlamydomonas bullosa to copper and cadmium: Effects on ultrastructure

   • I. Visviki
   • J. W. Rachlin

   OriginalPaper Pages: 154 - 162

5. Sand spiked with copper as a reference toxicant material for sediment toxicity testing: A preliminary evaluation

   • R. M. Burgess
   • B. A. Rogers
   • G. E. Morrison

   OriginalPaper Pages: 163 - 168

6. Evaluation of the critical body burden concept based on inorganic and organic mercury toxicity to rainbow trout (Oncorhynchus mykiss)

   • A. J. Niimi
   • G. P. Kissoon

   OriginalPaper Pages: 169 - 178

7. Temperature effects on cadmium and mercury kinetics in freshwater molluscs under laboratory conditions

   • L. Tessier
   • G. Vaillancourt
   • L. Pazdernik

   OriginalPaper Pages: 179 - 184

8. Spatial and temporal distributions of aromatic petroleum hydrocarbons in the coastal waters of Bahrain

   • I. M. Madany
   • A. Al-Haddad
   • E. -S. Al-Shirbini

   OriginalPaper Pages: 185 - 190

9. Stimulation of oxyradical production of hepatic microsomes of flounder (Platichthys flesus) and perch (Perca fluviatilis) by model and pollutant xenobiotics

   • P. Lemaire
   • A. Matthews
   • D. R. Livingstone

   OriginalPaper Pages: 191 - 200

10. Quantitative assessment of groundwater quality using a biological indicator: Some preliminary observations

    • R. M. Pfeil
    • J. A. Venkat
    • P. P. Nair

    OriginalPaper Pages: 201 - 207

11. The effects of polybrominated biphenyls and perchlorinated terphenyls on in vitro fertilization in the mouse

    • S. D. Kholkute
    • J. Rodriguez
    • W. R. Dukelow

    OriginalPaper Pages: 208 - 211

12. Acute and chronic toxicity of 2,3,4,6-tetrachlorophenol and pentachlorophenol to Daphnia and rotifers

    • K. Liber
    • K. R. Solomon

    OriginalPaper Pages: 212 - 221

13. Effects of organic fertilizer treatments and old humus on thiofanox and aldicarb soil metabolisms in sugar beets

    • J. Rouchaud
    • F. Gustin
    • A. Wauters

    OriginalPaper Pages: 222 - 226

14. Hematology and serum biochemistry of Japanese quail fed dietary tri-n-butyltin oxide during reproduction

    • T. M. M. Coenen
    • I. C. Enninga
    • J. C. M. van der Hoeven

    OriginalPaper Pages: 227 - 233

15. Evaluation of toxic effects of the organophosphorus insecticide azinphos-methyl in experimentally and naturally exposed birds

    • L. Lari
    • A. Massi
    • S. Focardi

    OriginalPaper Pages: 234 - 239

16. Comparison of short-term aquatic toxicity: Formulation vs active ingredients of pesticides

    • R. Schmuck
    • W. Pflüger
    • R. Fischer

    OriginalPaper Pages: 240 - 250

17. Bioconcentration of 5,5′,6 -trichlorobiphenyl and pentachlorophenol in the midge, Chironomus riparius, as measured by a pharmacokinetic model

    • M. J. Lydy
    • W. L. Hayton
    • S. W. Fisher

    OriginalPaper Pages: 251 - 256

18. Erratum

    Erratum Pages: 257 - 257

19. Announcement

    Announcement Pages: 258 - 258