1. Food of roach (Rutilus rutilus) and ide (Leusiscus idus): significance of diet shift for interspecific competition in omnivorous fishes

   • Åge Brabrand

   Original Papers Pages: 461 - 467

2. Seasonal variation in catabolic enzyme activities in breast muscle of some migratory birds

   • Björn O. Lundgren
   • Karl-Heinz Kiessling

   OriginalPaper Pages: 468 - 471

3. Diffused light conditions in canopy gaps in a beech (Fagus crenata Blume) forest

   • Tohru Nakashizuka

   OriginalPaper Pages: 472 - 474

4. Canopy transpiration and water fluxes in the xylem of the trunk of Larix and Picea trees — a comparison of xylem flow, porometer and cuvette measurements

   • E. -D. Schulze
   • J. Čermák
   • J. Kučera

   OriginalPaper Pages: 475 - 483

5. A comparison of the energy budgets of three species of Pogonomyrmex harvester ants (Hymenoptera: Formicidae)

   • William P. MacKay

   OriginalPaper Pages: 484 - 494

6. Egg distribution and survivorship in the pierid butterfly, Colias alexandra

   • Jane Leslie Hayes

   OriginalPaper Pages: 495 - 498

7. Population regulation of the native holly leafminer, Phytomyza ilicicola Loew (Diptera: Agromyzidae), on American holly

   • Daniel A. Potter

   OriginalPaper Pages: 499 - 505

8. A new look at energy conversion in ectothermic and endothermic animals

   • W. Wieser

   OriginalPaper Pages: 506 - 510

9. Egg predation in forest bird communities on islands and mainland

   • Sven G. Nilsson
   • Christer Björkman
   • Jacob Höglund

   OriginalPaper Pages: 511 - 515

10. Nesting holes and food supply in relation to forest bird densities on islands and mainland

    • Sven G. Nilsson
    • Christer Björkman
    • Jacob Höglund

    OriginalPaper Pages: 516 - 521

11. Comparative water relations of adjacent california shrub and grassland communities

    • S. D. Davis
    • H. A. Mooney

    OriginalPaper Pages: 522 - 529

12. The carbon balance of flowers of Diplacus aurantiacus (Scrophulariaceae)

    • K. Williams
    • G. W. Koch
    • H. A. Mooney

    OriginalPaper Pages: 530 - 535

13. Effects of coexistence on the performance of white clover-perennial ryegrass mixtures

    • D. R. Evans
    • J. Hill
    • I. Rhodes

    OriginalPaper Pages: 536 - 539

14. Thermal ecology of Pieris butterflies (Lepidoptera: Pieridae): a new mechanism of behavioral thermoregulation

    • Joel G. Kingsolver

    OriginalPaper Pages: 540 - 545

15. Thermoregulatory significance of wing melanization in Pieris butterflies (Lepidoptera: Pieridae): physics, posture, and pattern

    • Joel G. Kingsolver

    OriginalPaper Pages: 546 - 553

16. Responses of cowpeas (Vigna unguiculata (L.) Walp.) to progressive soil drought

    • O. Osonubi

    OriginalPaper Pages: 554 - 557

17. Central place foraging by beavers (Castor canadensis): a test of foraging predictions and the impact of selective feeding on the growth form of cottonwoods (Populus fremontii)

    • Mark A. McGinley
    • Thomas G. Whitham

    OriginalPaper Pages: 558 - 562

18. Resource selection by tropical frugivorous birds: integrating multiple interactions

    • Thomas E. Martin

    OriginalPaper Pages: 563 - 573

19. r-and K-selection in soil ciliates: a field and experimental approach

    • G. Lüftenegger
    • W. Foissner
    • H. Adam

    OriginalPaper Pages: 574 - 579

20. Prey analysis of four species of tropical orb-weaving spiders (Araneae: Araneidae) and a comparison with araneids of the temperate zone

    • Wolfgang Nentwig

    OriginalPaper Pages: 580 - 594

21. Species of reptiles occupying habitat islands in Western Arizona: a deterministic assemblage

    • K. Bruce Jones
    • Lauren P. Kepner
    • Thomas E. Martin

    OriginalPaper Pages: 595 - 601

22. Foliar nutrient dynamics and nutrient use efficiency in Cornus florida

    • Jane A. Kost
    • R. E. J. Boerner

    OriginalPaper Pages: 602 - 606