Table 3

Effects of life-history variables and bird (n = 196) vs. mammal (n = 500) status (referred as Class) on mtDNA substitution rate.

Model

Variable

Effect

t value

P


(A) Body mass + Class

Body mass

-0.25

-8.9

<0.01

Class (Mammals)

0.22

3.1

<0.01

Body mass: Class (Mammals)

0.13

4.4

<0.01


(B) Maximum longevity + Class

Maximum longevity

-0.65

-9.4

<0.01

Class (Mammals)

0.31

2.5

0.01

Maximum longevity: Class (Mammals)

0.04

0.5

0.65


Nabholz et al. BMC Evolutionary Biology 2009 9:54   doi:10.1186/1471-2148-9-54

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