1. Niche width and variation within and between populations in colonizing species (Carex flava group)

   • Bernhard Schmid

   Original Papers Pages: 1 - 5

2. Gape-limitation, foraging tactics and prey size selectivity of two microcarnivorous species of fish

   • Russell J. Schmitt
   • Sally J. Holbrook

   Original Papers Pages: 6 - 12

3. Cannibalism in the red wood ant, Formica polyctena (Hymenoptera: formicidae)

   • Gerard J. J. Driessen
   • André Th. Van Raalte
   • Gerrit J. De Bruyn

   Original Papers Pages: 13 - 22

4. Egg-laying patterns in butterflies in relation to their phenology and the visual apparency and abundance of their host plants

   • Christer Wiklund

   Original Papers Pages: 23 - 29

5. The cost of being able to fly: a study of wing polymorphism in two species of crickets

   • Derek A. Roff

   Original Papers Pages: 30 - 37

6. Significance of bacterial biomass in the nutrition of a freshwater isopod (Lirceus sp.)

   • Stuart Findlay
   • Judy L. Meyer
   • Phillip J. Smith

   Original Papers Pages: 38 - 42

7. Life history variation within a parthenogenetic population of Daphnia parvula (Crustacea: Cladocera)

   • Michael L. Pace
   • Karen Porter
   • Yvette S. Feig

   Original Papers Pages: 43 - 51

8. Direct transfer of newly-fixed nitrogen from free-living epiphyllous microorganisms to their host plant

   • Barbara L. Bentley
   • Edward J. Carpenter

   Original Papers Pages: 52 - 56

9. Contrasting resource allocation patterns in Sedum lanceolatum Torr.: Biomass versus energy estimates

   • Claudia L. Jolls

   Original Papers Pages: 57 - 62

10. Homeostasis of plasma electrolytes, water and sodium pools in the Estuarine Crocodile, Crocodylus porosus, from fresh, saline and hypersaline waters

    • Laurence E. Taplin

    Original Papers Pages: 63 - 70

11. Low nutritive quality as defence against herbivores: induced responses in birch

    • S. Neuvonen
    • E. Haukioja

    Original Papers Pages: 71 - 74

12. Factors affecting pupal survival and eclosion in the pine beauty moth, Panolis flammea (D&S)

    • Simon R. Leather

    Original Papers Pages: 75 - 79

13. Flower visitation and pollination efficiency of some North European butterflies

    • Ola Jennersten

    Original Papers Pages: 80 - 89

14. The abundance of invertebrate herbivores in relation to the availability of nitrogen in stressed food plants

    • T. C. R. White

    Original Papers Pages: 90 - 105

15. Seasonal changes in morphological structuring in a guild of benthic stream fishes

    • G. L. Miller

    Original Papers Pages: 106 - 109

16. Intraspecific variation in the population dynamics and growth of the limpet, Cellana tramoserica

    • W. J. Fletcher

    Original Papers Pages: 110 - 121

17. The effect of larval competition on development time and adult size in the seaweed fly, Coelopa frigida

    • R. K. Butlin
    • T. H. Day

    Original Papers Pages: 122 - 127

18. Instability of the snowshoe hare and woody plant interaction

    • John F. Fox
    • John P. Bryant

    Original Papers Pages: 128 - 135

19. Nitrate content and nitrate reductase activity in Rumex obtusifolius L.

    • G. Gebauer
    • A. Melzer
    • H. Rehder

    Original Papers Pages: 136 - 142

20. The terrestrial arthropods of the grass sward of Lynch Island, a specially protected area in Antarctica

    • Michael B. Usher
    • Marion Edwards

    Short Communication Pages: 143 - 144