1. Density-dependent predation ofChaoborus flavicans onDaphnia longispina in a small lake: the effect of prey size

   • Piotr I. Krylov

   OriginalPaper Pages: 131 - 140

2. The concentration of cadmium, lead, copper and zinc inChironomus gr.thummi larvae (Diptera, Chironomidae) with deformedversus normal menta

   • L. G. Janssens de Bisthoven
   • K. R. Timmermans
   • F. Ollevier

   OriginalPaper Pages: 141 - 149

3. Branchinecta belki n. sp. (Branchiopoda: Anostraca), a new fairy shrimp from Mexico, hybridizing withB. packardi Pearse under laboratory conditions

   • Alejandro M. Maeda-Martinez
   • Hortencia Obregon-Barboza
   • Henri J. Dumont

   OriginalPaper Pages: 151 - 162

4. Tropodiaptomus lateralis Kiefer, 1932 (Copepoda: Calanoida) in Oguta Lake, southeastern Nigeria

   • Sibylle Maas
   • Chukwuemekanim S. Nwadiaro
   • Henri J. Dumont

   OriginalPaper Pages: 163 - 170

5. The effect of environmental factors on the nesting and courtship behaviour ofTilapia zillii in Lake Kinneret (Israel)

   • M. N. Bruton
   • Moshe Gophen

   OriginalPaper Pages: 171 - 178

6. Freeliving marine nematodes from East African coasts.Bathyepsilonema anulosum sp.n. andLeptepsilonema richardi sp.n.

   • Dominick Verschelde
   • Magda Vincx

   OriginalPaper Pages: 179 - 186

7. Do intruding predators and trap position affect the reliability of catches in activity traps?

   • Johan Elmberg
   • Petri Nummi
   • Kjell Sjöberg

   OriginalPaper Pages: 187 - 193