1. The costs of reproduction in female columbian ground squirrels

   • J. O. Murie
   • F. S. Dobson

   Original Papers Pages: 1 - 6

2. Foraging behavior of a Dipteran leaf miner on exploited and unexploited hosts

   • D. T. Quiring
   • J. N. McNeil

   Original Papers Pages: 7 - 15

3. Growth and survival of peritrich ciliates in an urban stream

   • Y. Kusuoka
   • Y. Watanabe

   Original Papers Pages: 16 - 20

4. Experimental evidence for interactive habitat segregation between roach (Rutilus rutilus) and rudd (Scardinius erythrophthalmus) in a shallow eutrophic lake

   • L. Johansson

   Original Papers Pages: 21 - 27

5. Defense of mates: a territory departure rule for male tree lizards following sex-ratio manipulation

   • R. T. M'Closkey
   • K. A. Baia
   • R. W. Russell

   Original Papers Pages: 28 - 31

6. The decline of the Serengeti Thomson's gazelle population

   • M. Borner
   • C. D. FitzGibbon
   • M. E. Holt

   Original Papers Pages: 32 - 40

7. Experimental studies of exploitative competition in a grazing stream insect

   • D. D. Hart

   Original Papers Pages: 41 - 47

8. Ingested prey increase risks of visual predation in transparent Chaoborus larvae

   • L. A. Giguère
   • T. G. Northcote

   Original Papers Pages: 48 - 52

9. An experimental manipulation of food and water: growth and time-space utilization of hatchling lizards (Sceloporus undulatus)

   • S. M. Jones
   • S. R. Waldschmidt
   • M. A. Potvin

   Original Papers Pages: 53 - 59

10. Temporal and spatial variations in the behavior of shrubsteppe birds

    • J. A. Wiens
    • B. Van Horne
    • J. T. Rotenberry

    Original Papers Pages: 60 - 70

11. Response of Salvinia molesta to insect damage: changes in nitrogen, phosphorus and potassium content

    • I. W. Forno
    • J. L. Semple

    Original Papers Pages: 71 - 74

12. Herbivory and intraspecific competition in a stream caddisfly population

    • G. A. Lamberti
    • J. W. Feminella
    • V. H. Resh

    Original Papers Pages: 75 - 81

13. Influence of krummholz mat microclimate on needle physiology and survival

    • J. L. Hadley
    • W. K. Smith

    Original Papers Pages: 82 - 90

14. Contaminated food and uptake of heavy metals by fish: a review and a proposal for further research

    • R. Dallinger
    • F. Prosi
    • H. Back

    Original Papers Pages: 91 - 98

15. The probability of interspecific competitive situations in scale-insects (Homoptera, Coccoidae)

    • F. Kozár

    Original Papers Pages: 99 - 104

16. Competition for nutrients between Calluna vulgaris (L.) Hull and Molinia caerulea (L.) Moench

    • G. W. Heil
    • M. Bruggink

    Original Papers Pages: 105 - 107

17. Carbon dioxide assimilation in the flowerhead of Arctium

    • H. Heilmeier
    • D. M. Whale

    Original Papers Pages: 109 - 115

18. Non-random distribution patterns of leaf miners on oak trees

    • P. D. Stiling
    • D. Simberloff
    • L. C. Anderson

    Original Papers Pages: 116 - 119

19. Copper and zinc in an ecological series of talitroidean Amphipoda (Crustacea)

    • P. G. Moore
    • P. S. Rainbow

    Original Papers Pages: 120 - 126

20. Use of cover and the need to breathe: the effects of hypoxia on vulnerability of dwarf gouramis to predatory snakeheads

    • N. G. Wolf
    • D. L. Kramer

    Original Papers Pages: 127 - 132

21. The effect of a predatory leech, Nephelopsis obscura, on mortality, growth, and production of chironomid larvae in a small pond

    • J. B. Rasmussen

    Original Papers Pages: 133 - 138

22. The ecological cost of morphological specialization: feeding by a fossorial lizard

    • R. M. Andrews
    • F. H. Pough
    • A. de Queiroz

    Original Papers Pages: 139 - 145

23. Variability in the chemistry of estuarine plants and its effect on feeding by Canada geese

    • R. Buchsbaum
    • I. Valiela

    Original Papers Pages: 146 - 153

24. Sap feeding by the marsupial Petaurus australis: an enigmatic behaviour?

    • R. L. Goldingay

    Original Papers Pages: 154 - 158