BIPEDALISM MODEL EVALUATOR		Home
Evaluative Framework
2 "Ecological"
2.3 Why Apes are not Bipedal	This criterion is similar to the 'teleological' assessment but is more specific in that is asks whether the model in question includes an explanation as to why whatever factor is being proposed to have driven bipedalism in hominins did not also apply to the ancestors of the great apes. Generally, models based on scenarios involving habitat shift or plausible behavioural changes were judged better here than those beased on habitats and/or behaviours of extant apes.
Models ranked by this criterion	EAN s4.1.1 Coastal foraging / Habitat Compulsion 9 s4.1.4 River Apes / Habitat Compulsion 8 s4.1.5 Wetland USO foraging / Habitat Compulsion 8 s4.1.3 Amphibische Genalistheorie / Habitat Compulsion 8 s6.1.1 Thermoregulatory Hypothesis / Thermoregulation 8 s3.2.1 Postural feeding hypothesis / Feeding 7 s4.3.1 Variability Selection Hypothesis / Habitat Compulsion 7 s1.2.4 Male Provisioning / Forelimb pre-emption (carrying) 7 s3.1.1 Seed Eating / Feeding 7 s5.1.1 Slow, long-distance walking / Locomotor efficiency 7 s1.2.3 Migration-carrying hypotheses / Forelimb pre-emption (carrying) 7 s4.1.2 Aquarboreal Model / Habitat Compulsion 6 s3.4.1 Stalking / Feeding 6 s1.2.1 Carrying food back to gallery forest bases. / Forelimb pre-emption (carrying) 6 s1.5.2 Weapon wielding / Forelimb pre-emption (carrying) 6 s1.4.1 Weapon Throwing / Forelimb pre-emption (carrying) 6 s3.1.2 Terrestrial squat feeding on the forest floor / Feeding 6 s7.1.1 Iodine deficiency / Dietary Factors 5 s3.1.3 Other gathering / Feeding 5 s2.6.1 Copied Gimmick Idea / Behaviour 5 s1.2.2 Carrying and scavenging / Forelimb pre-emption (carrying) 5 s2.1.1 Nuptial Gifts / Behaviour 5 s3.4.2 Specific Hunting / Feeding 5 s5.5.1 Endurance Running / Locomotor efficiency 5 s3.4.3 General scavenging/hunting / Feeding 5 s3.3.1 Arboreal predation / Feeding 4 s1.1.1 General freeing of the hands / Forelimb pre-emption (carrying) 4 s2.4.1 Sentinel behaviour / Behaviour 4 s1.5.1 Tool carriage / Forelimb pre-emption (carrying) 3 s8.1.1 Evo Devo mutation / Random Genetic Factors 3 s5.2.1 Biomechanical inevitability / Locomotor efficiency 3 s5.4.1 Locomotor de-coupling / Locomotor efficiency 3 s4.2.1 Walking on Snow or mud / Habitat Compulsion 3 s1.3.1 Female driven infant carrying / Forelimb pre-emption (carrying) 3 s2.2.1 Threat displays directed at other species / Behaviour 2 s2.3.1 Intra-specific threat displays / Behaviour 2 s9.1.1 Multi-factorial / Combination 2 s2.5.1 Phallic Display directed at females / Behaviour 2 s5.3.1 Efficiency of moving from tree to tree / Locomotor efficiency 1 s4.4.2 Arboreal "upwardly mobile" hypothesis / Habitat Compulsion 0 s4.4.1 Descent from arboreal Hylobatian locomotion / Habitat Compulsion 0 s4.4.3 Orang-utan-like hand assisted bipedalism / Habitat Compulsion 0