Table 2

Summary of the best models from model selection analysis on the ‘reduced dataset’ using the phylogenetic generalized least square (PGLS) model
All anurans Bufonidae Dendrobatoidea Hylidae Ranidae
‘Range + mean’ data ‘Mean’ data ‘Range + mean’ data ‘Mean’ data ‘Range + mean’ data ‘Mean’ data ‘Range + mean’ data ‘Range + mean’ data ‘Mean’ data
SDI ~ PC SDI ~ PC SDI ~ ES SDI ~ ES SDI ~ CS SDI ~ CS+ SDI ~ PC SDI ~ ES SDI ~ ES
λ = 0.797 λ = 0.799 λ = 0.810 λ = 0.827 λ = 0.805 FPC λ = 0.823 λ = 0.810 λ = 0.827
df = 213 df = 164 df = 21 df = 13 df = 25 λ = 0.603 df = 128 df = 70 df = 65
t = −3.43 t = −2.91 t = 2.43 t = 1.89 t = 3.39 df = 21 t = −2.54 t = −2.16 t = −1.94
p < 0.01 p < 0.01 p = 0.02 p = 0.08 p < 0.01 p = 0.01 p = 0.03 p = 0.06
AIC = −182.21 AIC = −138.14 AIC = −19.94 AIC = −24.75 AIC = −93.30 CS: AIC = −161.42 AIC = −32.61 AIC = −32.50
SDI ~ MPC SDI ~ MPC t = 2.63
λ = 0.810 λ = 0.783 p = 0.02
df = 213 df = 164 FPC:
t = −3.81 t = −3.91 t = −3.03
p < 0.01 p < 0.01 p < 0.01
AIC = −184.97 AIC = −144.52 AIC = −86.52

SDI is the response variable and life history traits are the explanatory variables, and species with missing values on any of the traits are excluded. PGLS is conducted at both all-anuran and family levels. No significant models are detected in the families Dicroglossidae and Megophryidae using either ‘range + mean’ or ‘mean’ data, and in the family Hylidae using ‘mean’ data.

SDI sexual size dimorphism index, CS log clutch size, ES log egg size, PC parental care, MPC male parental care, FPC female parental care, and AIC Akaike information criterion.

Han and Fu

Han and Fu BMC Evolutionary Biology 2013 13:27   doi:10.1186/1471-2148-13-27

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