Does life history shape sexual size dimorphism in anurans? A comparative analysis

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.

ISSN: 2730-7182