Table 4.

Comparison of estimated lipid costs for migration (COT) of eel recalculated on basis of using 79.8% fat and a 5,500-km migration with reference, experiment, conditions, and migration costs in kJ/kg eel/km (COT_tot) and required fat in g fat/kg eel/km

Experiment	Conditions	COTtot (kJ/kg/km)	COTfat (mg fat/kg/km)	Ref
<1 day	Male (?) yellow and silver (250 g) FW, 0.35–0.65 m/s, 15°C	1.37–1.74	27.8–35.3	Schmidt-Nielsen (1972)
387 km	5 female silver eels (±1 m) SW, 0.5 BL/s, 14°C	0.57	11.5	van Ginneken and van den Thillart (2000)
2,850 km	5 female farmed eels (919 g) FW, 0.5 BL/s, 19°C	0.833	16.7	Van den Thillart et al. (2004)
5,533 km	9 female farmed eels (3 years old, 915 g) FW, 0.5 BL/s, 19°C	0.418/0.611*	8.4/12.4*	Van Ginneken et al. (2005b)
2,173 km	6 female farmed silver eels (5 years old, 951 g) FW, 0.8 BL/s, 18°C	0.469/0.522*	9.5/10.5*	Palstra et al. (2006b)
1,232 km	6 female Lake Grevelingen silver eels (6–13 years old, 762 g) SW, 0.8 BL/s, 10–18°C	0.702/0.860*	14.2/17.5*	Palstra et al. (2006b)

Source: Palstra et al. (2006b)

* Measured by two methods: resp. oxygen consumption and carcass analysis (van Ginneken et al. 2005a, b) or weight loss (Palstra et al. 2006b)