Table 4.
Descriptive statistics for balancing-side mandibular corpus strains at peak γmax in goats and alpacas
| Animal-Exp. No. | Gauge side | No. of chewing cycles | Principal tension (ε1)Mean ± SD/Largest | Principal compression (ε2)Mean ± SD/Largest | Maximum shear (γmax)Mean ± SD/Largest | ε1/ε2 Mean ± SD | Direction of ε1(°)* Mean ± SD (Range) |
|---|---|---|---|---|---|---|---|
| Goat | |||||||
| G1-1 | L | 116 | 148 ± 32/218 | –406 ± 94/–587 | 554 ± 125/805 | 0.37 ± 0.02 | 98 ± 0.6 (97–101) |
| R | 67 | 33 ± 6/48 | –280 ± 74/–407 | 314 ± 80/448 | 0.12 ± 0.02 | 107 ± 0.8 (105–108) | |
| G1-2 | L | 57 | –30 ± 5/–40 | –100 ± 18/–133 | 130 ± 23/173 | 0.30 ± 0.03 | 127 ± 3.4 (118–135) |
| G1-3 | R-Sup | 74 | 101 ± 21/138 | –261 ± 54/–363 | 363 ± 75/501 | 0.39 ± 0.01 | 78 ± 2 (72–80) |
| R-Inf | 74 | 238 ± 53/329 | –507 ± 112/–703 | 745 ± 165/1033 | 0.47 ± 0.01 | 89 ± 0.31 (88–90) | |
| G1-4 | L | 71 | 124 ± 50/232 | –224 ± 95/–423 | 349 ± 145/655 | 0.56 ± 0.02 | 108 ± 0.7 (106–110) |
| G2-1 | L | 160 | 110 ± 18/151 | –280 ± 49/–382 | 390 ± 66/531 | 0.39 ± 0.02 | 77 ± 0.6 (75–78) |
| R | 138 | 235 ± 61/374 | –400 ± 100/–648 | 635 ± 161/1022 | 0.58 ± 0.03 | 93 ± 1.0 (92–98) | |
| G2-2 | L-Sup | 45 | 30 ± 9/46 | –58 ± 17/–93 | 88 ± 26/139 | 0.60 ± 0.07 | 71 ± 2.0 (67–77) |
| L-Inf | 45 | 25 ± 7/40 | –35 ± 10/–52 | 61 ± 17/93 | 0.70 ± 0.15 | 96 ± 2.8 (89–105) | |
| Goat Mean ± SD | 101 ± 89 | –255 ± 157 | 363 ± 231 | 0.45 ± 0.17 | 94 ± 17 | ||
| 95% CI for Grand Mean | 46–157 | –158 to –352 | 219–506 | 0.34–0.55 | 83.95–104.89 | ||
| Alpaca | |||||||
| A1-1 | L | 58 | 179 ± 31/263 | –376 ± 71/–574 | 555 ± 101/837 | 0.48 ± 0.03 | 85 ± 1.5 (80–87) |
| A1-2 | L | 66 | 123 ± 18/158 | –177 ± 30/–259 | 300 ± 36/392 | 0.72 ± 0.14 | 44 ± 5.4 (37–58) |
| R | 73 | 189 ± 32/253 | –222 ± 37/–301 | 405 ± 68/553 | 0.85 ± 0.02 | 76 ± 1.9 (71–80) | |
| A1-3 | R | 58 | 236 ± 62/381 | –460 ± 122/–747 | 638 ± 181/1065 | 0.52 ± 0.05 | 84 ± 1.4 (81–86) |
| A2-1 | R | 144 | 199 ± 18/242 | –347 ± 66/–507 | 546 ± 73/749 | 0.59 ± 0.11 | 62 ± 8.4 (46–75) |
| A2-2 | L | 85 | 73 ± 16/107 | –216 ± 57/–340 | 281 ± 71/427 | 0.35 ± 0.03 | 81 ± 3.3 (73–87) |
| R | 89 | 137 ± 20/187 | –362 ± 64/–525 | 482 ± 83/690 | 0.38 ± 0.02 | 79 ± 4.4 (69–87) | |
| A2-3 | R-Sup | 59 | 154 ± 15/184 | –339 ± 50/–462 | 492 ± 62/636 | 0.46 ± 0.04 | 79 ± 4.7 (69–88) |
| R-Inf | 59 | 153 ± 28/221 | –230 ± 47/–358 | 384 ± 74/579 | 0.67 ± 0.03 | 91 ± 4.8 (77–99) | |
| A3-1 | R | 88 | 141 ± 35/218 | –369 ± 57/–494 | 510 ± 91/712 | 0.38 ± 0.05 | 106 ± 2.3 (101–111) |
| A3-2 | R | 36 | 50 ± 17/77 | –454 ± 102/–711 | 505 ± 114/776 | 0.11 ± 0.03 | 76 ± 3.4 (69–86) |
| A4-1 | R | 45 | 138 ± 25/183 | –300 ± 89/–479 | 438 ± 112/661 | 0.48 ± 0.07 | 74 ± 4.3 (63–82) |
| Alpaca Mean ± SD | 148 ± 51 | –321 ± 93 | 461 ± 105 | 0.50 ± 0.19 | 78 ± 15 | ||
| 95% CI for grand mean | 119–177 | –268 to –374 | 402–520 | 0.39–0.61 | 69.57–86.50 | ||
*
The orientation of ε1is given relative to the long axis of the corpus.