Results of the discriminant function analyses (DFA) performed on the kinematics of movements in Tupinambis merianae for intraoral transport and pharyngeal packing of large and small prey
| . | Intraoral transport . | . | Pharyngeal packing . | . | ||
|---|---|---|---|---|---|---|
| Cervical | Eigenvalues | 1.58 | Eigenvalues | 2.86 | ||
| Total rotation of the head | –0.56 | Maximal neck slope | 1 | |||
| Time to maximal neck slope | 0.68 | |||||
| Head angle at the onset of mouth opening | 0.58 | |||||
| Pinkies (89.8%) | 1.09 | Pinkies (91.5%) | 1.59 | |||
| Mice (77.6%) | –1.35 | Mice (97.1%) | –1.69 | |||
| Jaws | Eigenvalues | 0.62 | Eigenvalues | 1.45 | ||
| Maximal gape | 1 | Maximal gape | 1 | |||
| Pinkies (72.7%) | –0.69 | Pinkies (85.5%) | –1.13 | |||
| Mice (71.6%) | 0.85 | Mice (77.9%) | 1.20 | |||
| Tongue | Eigenvalues | 0.37 | Eigenvalues | 2.00 | ||
| Time to maximal contraction of the pharynx | 1 | Speed of retraction | 0.91 | |||
| Time to maximal inflation of the pharynx | –0.53 | |||||
| Pinkies (68.4%) | –0.47 | Pinkies (87.73%) | 1.19 | |||
| Mice (56.7%) | 0.71 | Mice (88.68%) | –1.54 | |||
| Integrative | Eigenvalues | 2.20 | Eigenvalues | 6.56 | ||
| Total rotation of the head | –0.90 | Maximal neck slope | 0.93 | |||
| Time to maximal neck slope | 0.93 | Speed of retraction | 0.50 | |||
| Time to maximal inflation of the pharynx | –0.70 | |||||
| Pinkies (94.2%) | 1.15 | Pinkies (99.9%) | 2.15 | |||
| Mice (80.0%) | –1.72 | Mice (99.9%) | –2.79 | |||
| . | Intraoral transport . | . | Pharyngeal packing . | . | ||
|---|---|---|---|---|---|---|
| Cervical | Eigenvalues | 1.58 | Eigenvalues | 2.86 | ||
| Total rotation of the head | –0.56 | Maximal neck slope | 1 | |||
| Time to maximal neck slope | 0.68 | |||||
| Head angle at the onset of mouth opening | 0.58 | |||||
| Pinkies (89.8%) | 1.09 | Pinkies (91.5%) | 1.59 | |||
| Mice (77.6%) | –1.35 | Mice (97.1%) | –1.69 | |||
| Jaws | Eigenvalues | 0.62 | Eigenvalues | 1.45 | ||
| Maximal gape | 1 | Maximal gape | 1 | |||
| Pinkies (72.7%) | –0.69 | Pinkies (85.5%) | –1.13 | |||
| Mice (71.6%) | 0.85 | Mice (77.9%) | 1.20 | |||
| Tongue | Eigenvalues | 0.37 | Eigenvalues | 2.00 | ||
| Time to maximal contraction of the pharynx | 1 | Speed of retraction | 0.91 | |||
| Time to maximal inflation of the pharynx | –0.53 | |||||
| Pinkies (68.4%) | –0.47 | Pinkies (87.73%) | 1.19 | |||
| Mice (56.7%) | 0.71 | Mice (88.68%) | –1.54 | |||
| Integrative | Eigenvalues | 2.20 | Eigenvalues | 6.56 | ||
| Total rotation of the head | –0.90 | Maximal neck slope | 0.93 | |||
| Time to maximal neck slope | 0.93 | Speed of retraction | 0.50 | |||
| Time to maximal inflation of the pharynx | –0.70 | |||||
| Pinkies (94.2%) | 1.15 | Pinkies (99.9%) | 2.15 | |||
| Mice (80.0%) | –1.72 | Mice (99.9%) | –2.79 | |||
Analyses were performed on kinematic data sets for the cranio-cervical, jaw and hyolingual movements separately, as well as for a combined data set including all discriminating variables. The proportion of cycles correctly classified is indicated between parentheses