Table 5.

Relations (Spearman correlation coefficients) between measurable traits of Japanese quail hatching eggs.

Trait	SC	EW	F	HFE	HSE	EWA	WLA	ESCA	BW
EW	−0.753 **
F	−0.266	0.098
HFE	−0.384 *	0.365 *	−0.075
HSE	−0.514 **	0.454 **	0.429 **	0.799 **
EWA	−0.589 **	0.753 **	0.080	0.433 **	0.463 **
WLA	0.593 **	−0.757 **	−0.080	−0.431 **	−0.462 **
ESCA	0.589 **	−0.753 **	−0.080	−0.433 **	−0.463 **
BW	−0.457 **	0.650 **	−0.156	0.161	0.105	0.582 **	−0.587 **	−0.582 **
BW/EW	0.192	0.005	−0.450 **	−0.167	−0.379 *	0.113	−0.115	−0.113	0.673 **

**—coefficient is significant at p ≤ 0.01 one-sided; *—coefficient is significant at p ≤ 0.05 one-sided; SC—shell colour; EW—egg weight; F—fertility; HFE—hatchability of fertile eggs; HSE—hatchability of set eggs; EWA—weight of eggs with alive embryo; WLA—weight loss of egg with alive embryo; ESCA—egg shell conductance of eggs with alive embryo; BW—body weight of healthy chick; BW/EW—proportion of chick in initial egg weight.