1. Density dependence in rangeland grasshoppers (Orthoptera: Acrididae)

   • William P. Kemp
   • Brian Dennis

   Original Papers Pages: 1 - 8

2. Pyrrolizidine alkaloid deters ant predators of Utetheisa ornatrix eggs: effects of alkaloid concentration, oxidation state, and prior exposure of ants to alkaloid-laden prey

   • James F. Hare
   • Thomas Eisner

   Original Papers Pages: 9 - 18

3. Trade-off between water transport efficiency and leaf life-span in a tropical dry forest

   • M. A. Sobrado

   Original Papers Pages: 19 - 23

4. Spatial scale of aggregation in three acarine predator species with different degrees of polyphagy

   • Zhi-Qiang Zhang
   • John P. Sanderson

   Original Papers Pages: 24 - 31

5. Habitat structure, dispersal strategies and queen number in two boreal Leptothorax ants

   • Jürgen Heinze

   Original Papers Pages: 32 - 39

6. Predator-mediated genotypic shifts in a prey population: experimental evidence

   • Joanna Pijanowska
   • Lawrence J. Weider
   • Winfried Lampert

   Original Papers Pages: 40 - 42

7. Estimation of N₂ fixation based on differences in the natural abundance of ¹⁵N among freshwater N₂-fixing and non-N₂-fixing algae

   • B. Gu
   • V. Alexander

   Original Papers Pages: 43 - 48

8. Sex-biased herbivory in Ephedra trifurca: the importance of sex-by-environment interactions

   • William J. Boecklen
   • M. Timm Hoffman

   Original Papers Pages: 49 - 55

9. Temporal pattern of foraging and microhabitat use by Galápagos marine iguanas, Amblyrhynchus cristatus

   • William A. Buttemer
   • William R. Dawson

   Original Papers Pages: 56 - 64

10. Multiple-site and-year analyses of stream insect emergence: a test of ecological theory

    • Bernhard Statzner
    • Vincent H. Resh

    Original Papers Pages: 65 - 79

11. Inbreeding and outbreeding depression in Daphnia

    • Luc De Meester

    Original Papers Pages: 80 - 84

12. What sources of organic carbon drive food webs in billabongs? A study based on stable isotope analysis

    • Stuart E. Bunn
    • Paul I. Boon

    Original Papers Pages: 85 - 94

13. Demography of Adenostoma fasciculatum after fires of different intensities in southern California chaparral

    • José M. Moreno
    • Walter C. Oechel

    Original Papers Pages: 95 - 101

14. Apparent vs. effective mating in an experimental population of Raphanus sativus

    • Tia-Lynn Ashman
    • Laura F. Galloway
    • Maureen L. Stanton

    Original Papers Pages: 102 - 107

15. The effect of anthracnose (Discula destructiva) infection on plant-herbivore interactions in dogwood (Cornus florida)

    • Jan Frederic Dudt
    • Donald J. Shure

    Original Papers Pages: 108 - 113

16. The spatial structure of the physical environment

    • G. Bell
    • M. J. Lechowicz
    • N. Tinker

    Original Papers Pages: 114 - 121

17. Maternal thermoregulation influences offspring viability in a viviparous lizard

    • R. Shine
    • P. Harlow

    Original Papers Pages: 122 - 127

18. Mutualism between the territorial intertidal limpet Patella longicosta and the crustose alga Ralfsia verrucosa

    • Christopher D. McQuaid
    • Pierre W. Froneman

    Original Papers Pages: 128 - 133

19. Root damage and water stress: treatments affecting the exploitation of the buds of common ash Fraxinus excelsior L., by larvae of the ash bud moth Prays fraxinella Bjerk. (Lep., Yponomeutidae)

    • Andrew Foggo
    • Martin R. Speight

    Original Papers Pages: 134 - 138

20. The influence of maternal age and mating frequency on egg size and offspring performance in Callosobruchus maculatus (Coleoptera: Bruchidae)

    • Charles W. Fox

    Original Papers Pages: 139 - 146