Comparison of biomechanical properties of byssal threads and thread portions from Mytilus edulis and M. galloprovincialis
| . | . | M. edulis . | M. galloprovincialis . |
|---|---|---|---|
| Proximal | Ei (MPa) | 77.5±11.6 | 50.5±3.8 |
| ϵb (%) | 79.0±2.2 | 108.8±3.9 | |
| σb (MPa) | 46.3±11.2 | 35.6±1.8 | |
| Strain energy (J cm-3) | 18.0±5.0 | 20.4±1.9 | |
| Distal | Ei (MPa) | 532±39 | 565±55 |
| ϵb (%) | 81.4±5.5 | 68.1±5.5 | |
| σb (MPa) | 143.1±12 | 138.5±16 | |
| σy (MPa) | 50.2±4.5 | 47.5±3.0 | |
| ϵy (%) | 20.4±1.6 | 13.4±1.1 | |
| Strain energy (J cm-3) | 61.8±6.4 | 46.3±6.6 | |
| Whole | Ei (MPa) | 328.3±27 | 417.8±56 |
| ϵb (%) | 90.5±7.0 | 74.5±8.0 | |
| σb (MPa) | 142.8±11 | 123.4±14 | |
| Strain energy (J cm-3) | 70.0±7.5 | 50.4±9.7 |
| . | . | M. edulis . | M. galloprovincialis . |
|---|---|---|---|
| Proximal | Ei (MPa) | 77.5±11.6 | 50.5±3.8 |
| ϵb (%) | 79.0±2.2 | 108.8±3.9 | |
| σb (MPa) | 46.3±11.2 | 35.6±1.8 | |
| Strain energy (J cm-3) | 18.0±5.0 | 20.4±1.9 | |
| Distal | Ei (MPa) | 532±39 | 565±55 |
| ϵb (%) | 81.4±5.5 | 68.1±5.5 | |
| σb (MPa) | 143.1±12 | 138.5±16 | |
| σy (MPa) | 50.2±4.5 | 47.5±3.0 | |
| ϵy (%) | 20.4±1.6 | 13.4±1.1 | |
| Strain energy (J cm-3) | 61.8±6.4 | 46.3±6.6 | |
| Whole | Ei (MPa) | 328.3±27 | 417.8±56 |
| ϵb (%) | 90.5±7.0 | 74.5±8.0 | |
| σb (MPa) | 142.8±11 | 123.4±14 | |
| Strain energy (J cm-3) | 70.0±7.5 | 50.4±9.7 |
Numbers in bold type indicate values that are significantly different from each other (P≤0.05).
Ei, Young's modulus; ϵb, strain at breaking; σb, strength at breaking; σy,yield strength; ϵy, strain at yield.
Values are means ± S.D. (N=10).