1. Growth, biomass, mortality, production and potential yield of the West African clam, Egeria radiata (Lamarck) (Lamellibranchia, Donacidae) in the Cross River system, Nigeria

   • Boniface S. Moses

   OriginalPaper Pages: 1 - 15

2. Biomass density and the relationship between submerged macrophyte biomass and plant growth form

   • Carlos M. Duarte
   • Jacob Kalff

   OriginalPaper Pages: 17 - 23

3. Biomass and photosynthesis of size-fractionated phytoplankton in Canadian Shield lakes

   • Michel Lafond
   • Bernadette Pinel-Alloul
   • Phillippe Ross

   OriginalPaper Pages: 25 - 38

4. The role of aquatic moss on community composition and drift of fish-food organisms

   • Merlyn A. Brusven
   • William R. Meehan
   • Russell C. Biggam

   OriginalPaper Pages: 39 - 50

5. A new species of Pseudoniphargus (Crustacea, Amphipoda) from subterranean waters in Tenerife (Canary Islands)

   • Elias L. Sánchez

   OriginalPaper Pages: 51 - 63

6. Seasonal variation in copper and zinc concentrations in three talitrid amphipods (Crustacea)

   • P. S. Rainbow
   • P. G. Moore

   OriginalPaper Pages: 65 - 72

7. On Neodiaptomus schmackeri (Poppe & Richard, 1892) (Crustacea, Copepoda)

   • T. Bhattacharya
   • Ratan K. Saha
   • B. H. Dussart

   OriginalPaper Pages: 73 - 78

8. Abundance and seasonal migrations of the penaeid shrimp Metapenaeus affinis (H. Milne-Edwards) within Iraqi waters

   • S. D. Salman
   • M. H. Ali
   • A H. Y. Al-Adhub

   OriginalPaper Pages: 79 - 90

9. Location of copper in larvae of Plectrocnemia conspersa (Curtis) (Trichoptera) exposed to elevated metal concentrations in a mine drainage stream

   • S. T. Darlington
   • A. M. Gower

   OriginalPaper Pages: 91 - 100