Table 4.

Working hypotheses and variables used to explain P. unifilis nest removal by humans in the eastern Brazilian Amazon.

Category	Working hypothesis	Variable name	Variable description	Variable supporta
Environmental	Nesting area type could influence the access of predators affecting nest removal	Type	Categorical – located along the river bank or island	−
Environmental	Nest density could influence the success of predators finding nests and affect nest removal	Nest density	Continuous – Number of turtle nests per nesting area (m2)	−
Environmental	Nest distance to water could influence the detectability of the nest, affecting nest removal	Distance to water	Continuous – Distance (m) from turtle nests to the nearest water source	+
Environmental	Different substrate types can affect nest detectability, and nest removal	PC1 scores	Continuous – Principal Component axis 1 scores from proportions of substrate grain sizes	++
Anthropogenic	Since Araguari river has higher anthropogenic pressure, different rivers will present differences in nest site selection and nest removal	River	Categorical – River segment (Falsino or Araguari)	++
Anthropogenic	Closer to houses human disturbances will increase, affecting nest site selection and nest removal	Distance to house	Continuous – Distance (km) to nearest riverine house	−
Spatial	Nests spatial distribution will affect nest removal	Long, Lat	Continuous – Coordinates (decimal degrees) of nests	−
Spatial	Nests located in the same nest site are more likely to have similar removal rates	Nesting site ID	Categorical – Nest site identification	++

^aStrength of variable support from our information theoretic analysis. Unsupported = “−”, weakly supported “+”, and strongly supported = “++”.