Table 2.

Phenotypic correlations between body weight, feed efficiency, and feeding behavior.¹

Traits	BW21	BW42	FI	FCR	BWG	RFI	DBWG	AIBM	VD	MD	NV	NM	TFT	DFI	MFI	DFR
BW21		0.45**	0.00	0.22**	−0.20**	0.18**	0.13**	0.09	0.07	0.10*	−0.01	−0.07	−0.09	0.29**	0.24**	0.11**
BW42	0.45**		0.60**	−0.04	0.78**	0.17**	0.68**	−0.09	0.04	0.05	0.09	0.07	0.15**	0.62**	0.24**	0.16**
FI	−0.06	0.48**		0.60**	0.66**	0.79**	0.23**	−0.25**	−0.05	−0.07	0.16**	0.20**	0.28**	0.74**	0.16**	0.23**
FCR	0.26**	−0.08	0.63**		−0.20**	0.96**	−0.40**	−0.15**	−0.06	−0.08	0.09	0.12**	0.12**	0.46**	0.11**	0.19**
BWG	−0.34**	0.68**	0.55**	−0.29**		0.06	0.66**	−0.16**	0.00	−0.01	0.11**	0.13**	0.23**	0.48**	0.10*	0.10*
RFI	0.18**	0.12**	0.82**	0.96**	−0.03		−0.23**	−0.20**	−0.06	−0.09	0.12**	0.16**	0.18**	0.60**	0.14**	0.22**
DBWG	0.12**	0.63**	−0.01	−0.52**	0.56**	−0.38**		−0.15**	0.08	0.12**	0.20**	0.15**	0.11**	0.62**	0.17**	0.01
AIBM	0.06	−0.08*	−0.23**	−0.13**	−0.14**	−0.18**	−0.10		0.51**	0.55**	−0.83**	−0.96**	−0.25**	−0.28**	0.85**	0.12**
VD	0.14**	0.01	−0.08	0.00	−0.10*	−0.02	0.07	0.51**		0.92**	−0.50**	−0.50**	0.56**	0.03	0.53**	−0.58**
MD	0.19**	0.06	−0.12**	−0.05	−0.09	−0.08	0.18**	0.53**	0.90**		−0.34**	−0.52**	0.60**	0.05	0.58**	−0.62**
NV	0.02	0.13**	0.12**	0.03	0.12**	0.06	0.23**	−0.80**	−0.47**	−0.26**		0.87**	0.33**	0.27**	−0.70**	−0.23**
NM	−0.06	0.07	0.19**	0.10	0.13**	0.14**	0.11*	−0.96**	−0.49**	−0.49**	0.86**		0.26**	0.25**	−0.84**	−0.16**
TFT	−0.03	0.11*	0.26**	0.17**	0.14**	0.21**	0.06	−0.28**	0.53**	0.59**	0.39**	0.30**		0.22**	−0.14**	−0.82**
DFI	0.37**	0.58**	0.62**	0.44**	0.30**	0.54**	0.54**	−0.24**	0.08*	0.14**	0.27**	0.21**	0.23**		0.26**	0.17**
MFI	0.24**	0.20**	0.10	0.09	0.02	0.11*	0.17**	0.87**	0.54**	0.59**	−0.67**	−0.86**	−0.16**	0.27**		0.22**
DFR	−0.01	0.11**	0.23**	0.14**	0.13**	0.19**	−0.06	0.16**	−0.57**	−0.63**	−0.31**	−0.20**	−0.84**	0.07	0.21**

*Significant levels at P < 0.05

**P < 0.01.

Abbreviations: AIBM, average interval between meals; BWG, body weight gain; BW21, average body weight at day 21; BW42, average body weight at day 42 DBWG, daily body weight gain; DFI, daily feed intake; DFR, daily feeding rate; FI, feed intake; MFI,meal feed intake; MD, meal duration; NM, number of meals per day; NV, number of visits per day; RFI, residual feed intake; TFT, total feed time; VD, visit duration.

¹The upper triangle showed the phenotypic correlations in male ducks, and the lower triangle showed the phenotypic correlations in female ducks.