Contents

3.1 Introduction 62

3.1.1 The Intertidal Zone 62

3.1.2 The Southern Bullkelps Durvillaea antarctica and D. willana 62

3.1.3 Drag and Streamlining 64

3.1.4 Objectives 65

3.2 Material and Methods 65

3.2.1 Tested Seaweeds 65

3.2.2 Drag Forces 66

3.2.3 Shortening Experiments 67

3.2.4 Drag Coefficients and Reconfiguration 67

3.2.5 Buoyancy 68

3.2.6 Field Studies 68

3.2.7 Morphological Survey 69

3.2.8 Statistical Analysis 69

3.3 Results 70

3.3.1 Drag Forces 70

3.3.2 Shortening Experiments 70

3.3.3 Drag Coefficients and Reconfiguration 72

3.3.4 Vogel Number 72

3.3.5 Buoyancy 73

3.3.6 Field Studies

3.3.7 Morphological Survey

3.4 Discussion

3.4.1 Drag Forces

3.4.2 Drag Coefficients, Reconfiguration, and the Vogel Number.

3.4.3 Buoyancy and Field Studies

3.4.4 Morphological Survey

3.5 Conclusion.. Acknowledgments References

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