1. Eclosion hormone-stimulated cGMP levels in the central nervous system of Manduca sexta: inhibition by lipid metabolism blockers, increase in inositol(1,4,5)trisphosphate and further evidence against the involvement of nitric oxide

   • D. B. Morton
   • P. J. Simpson

   Original Paper Pages: 417 - 427

2. Elevating intracellular free Mg²⁺ preserves sensitivity of Na⁺−K⁺ pump to ATP at reduced temperatures in guinea pig red blood cells

   • M. Marjanovic
   • J. S. Willis

   Original Paper Pages: 428 - 432

3. Thermal behavior of round and wagtail dancing honeybees

   • A. Stabentheiner
   • H. Kovac
   • K. Hagmüller

   Original Paper Pages: 433 - 444

4. Annual changes in body mass in captive Svalbard ptarmigan: role of changes in locomotor activity and food intake

   • K. Lindgård
   • K. A. Stokkan
   • S. Näslund

   Original Paper Pages: 445 - 449

5. Amiloride-sensitive Na⁺/H⁺ exchange stimulated by cellular acidification or shrinkage in red blood cells of the frog, Rana temporaria

   • N. C. Jørgensen

   Original Paper Pages: 450 - 457

6. The effects of the adrenoreceptor agonists phenylephrine and isoproterenol on the intracellular ion concentrations of branchial epithelial cells of brown trout (Salmo trutta L.)

   • I. J. Morgan
   • W. T. W. Potts

   Original Paper Pages: 458 - 463

7. Cholinoceptor-mediated control of catecholamine release from chromaffin cells in the American eel, Anguilla rostrata

   • S. G. Reid
   • S. F. Perry

   Original Paper Pages: 464 - 470

8. Flight of the honey bee VI: energetics of wind tunnel exhaustion flights at defined fuel content, speed adaptation and aerodynamics

   • U. Hanauer-Thieser
   • W. Nachtigall

   Original Paper Pages: 471 - 483

9. Flight of the honey bee VII: metabolic power versus flight speed relation

   • W. Nachtigall
   • U. Hanauer-Thieser
   • M. Mörz

   Original Paper Pages: 484 - 489

10. Effect of water-borne copper on respiratory and cardiac function during the early ontogeny of the brine shrimp, Artemia franciscana Kellogg 1908 (Branchiopoda: Anostraca)

    • J. I. Spicer

    Original Paper Pages: 490 - 495

11. Comparison of the two different phosphagen systems in the lugworm Arenicola marina

    • G. Kamp
    • H. Englisch
    • A. Elsing

    Original Paper Pages: 496 - 505