Road ecology of a Chihuahuan Desert snake community: size-based mortality sets the stage for evolutionary change in a widespread pitviper.

With sex as an interaction, total length was now marginally significant (estimate = 0.146, SE = 0.077, Z = 1.89, P = 0.059), weight and sex remained non-significant ( Table 5 ), but the interaction between sex and total length was not significant (estimate = −0.077, SE = 0.074, Z = −1.04, P = 0.298).

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