CONTENTS 



INTRODUCTION, 



page 5 



EXPERIMENTAL METHODS AND RESULTS. . . 7 

 Respiratory Metabolism of Siphonophores. . . 9 

 Measurements of Oxygen Consumption by 



Syringe. . .10 

 Measurements of Oxygen Consumption by Micro- 

 meter Respirometer. . .12 

 Comparison of Nanomla bijuga with Other 



Siphonophores. . . 15 

 Volume of Pneumatophore Gases.. .15 

 Rate of Gas Consumption. . . 20 

 Diffusion of Gases Across Float Walls. 

 The Work of Countering Hydrostatic 

 Pressure. . . 25 



DISCUSSION AND CONCLUSIONS. . .27 

 Summary . . . 29 



22 



RECOMMENDATIONS, 

 REFERENCES. . .33 



31 



APPENDIX A: NOTES ON ANALYTICAL 

 METHODS. ..37 



APPENDIX B: EXTERNAL MEASUREMENTS OF 



NANOMIAN PNEUMATOPHORES. ..41 



APPENDIX C: RATE OF CARBON MONOXIDE 

 PRODUCTION. ..4 5 



APPENDIX D: CALCULATIONS FOR DETERMINING 

 THE KROGH DIFFUSION CONSTANT 

 FOR PNEUMATOPHORE WALLS OF 

 NANOMIA ...49 



