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Table 5 Twelve candidate linear mixed-effects models used to analyse shear forces exerted by the three Oedura geckos, O. castelnaui, O. monilis and O. coggeri

From: Geckos cling best to, and prefer to use, rough surfaces

Model Response variable Random effect Fixed effects
1 log(shear force) gecko ID Substrate + log(toepad area)
2 log(shear force) gecko ID Substrate + log(mass)
3 log(shear force) gecko ID Substrate + log(mass) + log(toepad area)
4 log(shear force) gecko ID Substrate + Species + log(mass) + log(toepad area)
5 log(shear force) gecko ID Substrate + Species + log(mass)
6 log(shear force) gecko ID Substrate + Species + log (toepad area)
7 log(shear force) gecko ID Species + log(mass) + log(toepad area)
8 log(shear force) gecko ID Species + log(toepad area)
9 log(shear force) gecko ID Species + log(mass)
10 log(shear force) gecko ID Substrate*Species + log(toepad area)
11 log(shear force) gecko ID Substrate*Species + log(mass) + log(toepad area)
12 log(shear force) gecko ID Substrate*Species + log(mass)