Table 3.

The effect of female body size (standard length; SL mm) and selection treatment on zebrafish reproductive performance and early life-history traits

Trait	Variable	Parameter estimates* (SE)	Chi-square value† (df)	P-value‡
Spawning probability	Treatment	0.0047 (0.0454)	0.0249 (3,5)	0.9876
	Female SL		18.693 (2,3)	<0.0001
Fecundity (eggs/female per day)	Treatment		197.92 (4,6)	<0.0001
	Large-selected	0.0076 (0.5096)
	Random	0.0049 (0.0404)
	Small-selected	0.0110 (0.0065)
	Female SL	0.2448 (0.0107)	571.57 (5,6)	<0.0001
Relative fecundity (eggs per g of female WM per day)	Treatment		398.15 (4,6)	<0.0001
	Large-selected	0.0748 (0.4892)
	Random	0.0488 (0.0318)
	Small-selected	0.1204 (0.0461)
	Female SL	0.1805 (0.0075)	607.74 (5,6)	<0.0001
Egg yolk size (mm)	Treatment		21.691 (5,6)	<0.0001
	Large-selected	0.7362 (0.0430)
	Random	0.7110 (0.0073)
	Small-selected	0.6793 (0.0087)
	Female SL	−0.0048 (0.0014)	11.817 (6,7)	0.0006
Egg survival probability	Treatment		0.9581 (3,5)	0.6194
	Female SL		0.0011 (5,6)	0.9740
Hatching probability	Treatment		12.984 (5,7)	0.0015
	Large-selected	0.9999 (3.4546)
	Random	0.9998 (0.5575)
	Small-selected	0.9997 (0.8234)
	Female SL	−0.2796 (0.1146)	5.9779 (6,7)	0.0145
Larval age at hatch (d)	Treatment		8.7742 (5,7)	0.0124
	Large-selected	4.4977 (0.3788)
	Random	4.9623 (0.5411)
	Small-selected	4.5052 (0.5820)
	Female SL		1.7207 (7,8)	0.1896
Larval size (mm)	Treatment		3.3456 (4,6)	0.9585
	Female SL		0.0847 (6,8)	0.1877
Yolk sac volume (mm3)	Treatment		2.5359 (5,7)	0.2814
	Female SL		1.3175 (7,8)	0.2510
Swim bladder inflation probability	Treatment		1.0741 (4,6)	0.5845
	Female SL		0.1670 (6,7)	0.6828

Parameter estimates are given for the significant covariates, which are indicated in bold.

^*Logit-transformed estimated parameters for binomial distributed data and log-transformed estimated parameters for Poisson distributed data.

^†Chi-square value from the deletion of the variable from the full model.

^‡P-values derived from the chi-square statistics.