Table 1. Principal component analysis (PCA) of neuropeptide abundance of virgins, actively caring and post-caring Nicrophorus vespilloides females.

	Principal components
	PC1	PC2	PC3	PC4	PC5
Neuropeptides
NPLP-1	0.307	−0.203	0.034	−0.156	−0.184
TK	0.315	−0.061	0.231	0.110	−0.297
NVP	0.276	0.173	0.215	0.289	0.027
DH31	0.171	0.103	0.244	−0.578	0.131
FMRFa	0.274	0.182	−0.302	−0.260	−0.058
ITG	0.233	−0.291	−0.108	−0.340	0.185
SIFa	0.089	−0.475	0.174	0.068	0.149
IDL	0.221	−0.289	0.265	0.046	0.047
SK	0.281	−0.164	−0.385	0.144	−0.068
MYO	0.249	−0.226	−0.388	−0.031	−0.253
MIP	0.190	0.317	−0.079	0.267	0.296
RYa	0.189	0.363	−0.344	−0.152	0.068
PBAN	0.290	0.235	0.095	−0.046	−0.182
NTL	0.234	0.047	−0.112	0.356	0.406
sNPF	0.205	0.180	0.327	−0.221	0.381
DH47	0.201	0.239	0.291	0.147	−0.496
CCAP	−0.285	0.175	−0.027	−0.204	−0.218
Eigenvalues	7.013	3.387	1.859	1.588	1.246
% Variance explained	41.25	19.93	10.94	9.34	7.33

PCs with eigenvalues exceeding 1 are reported.