Table 1. Sample information.

Sample	Silver eel 1	Silver eel 2	Silver eel 3	Silver eel 4	Silver eel 5	Silver eel 6	Yellow eel	Mature eel
RNA-seq	yes	yes	yes	yes	no	no	yes	yes
qPCR	no	yes	yes	yes	yes	yes	no	no
Sampling date	07.12.2008	18.05.2011	18.05.2011	18.05.2011	18.05.2011	18.05.2011	27.08.2010	26.05.2010
Sampling location	Lake Grevelingen	Passie voor Vis BV	Passie voor Vis BV	Passie voor Vis BV	Passie voor Vis BV	Passie voor Vis BV	Nijvis Holding BV	Lake Veerse
Country	The Netherlands	The Netherlands	The Netherlands	The Netherlands	The Netherlands	The Netherlands	The Netherlands	The Netherlands
Origin	Wild (seawater)	Farmed (freshwater)	Farmed (freshwater)	Farmed (freshwater)	Farmed (freshwater)	Farmed (freshwater)	Farmed (freshwater)	Wild (seawater)
Sex	Female	Female	Female	Female	Female	Female	Female	Female
BW	1317.3	719.2	872.7	686.6	874.3	880.8	272.0	573.7
BL	88.4	67.2	69.9	70.2	72.6	71.6	50.2	77.9
CF	0.22	0.24	0.26	0.20	0.23	0.24	0.20	0.12
EdH	10.8	9.0	10.1	8.8	8.0	9.9	6.4	11.8
EdV	11.0	8.7	9.7	8.7	8.1	9.6	6.1	10.5
EI	10.6	9.2	11.0	8.6	7.0	10.4	6.1	12.5
PFL	42.4	24.3	24.4	27.7	27.8	28.4	17.5	35.6
SI	4	3	4	3	3	4	2	5
LW	13.2	4.1	8.0	4.2	8.1	8.0	4.2	9.9
HSI	1.00	0.57	0.92	0.61	0.93	0.91	1.54	1.73
GW	28.4	6.1	10.6	4.7	8.5	10.2	1.8	95.0
GSI	2.1	0.8	1.2	0.7	1.0	1.2	0.7	16.6

BW = body weight (g), BL = body length (cm), CF = condition factor, EdH = eye diameter horizontal (mm), EdV = eye diameter vertical (mm), EI = eye index (according to [19]), PFL = pectoral fin length (mm), SI = silver index (according to [20]), LW = liver weight (g), HSI= hepatosomatic index, GW = gonad weight (g), GSI = gonadosomatic index