TABLE 2.

Average leucine uptake rates measured in the dark in the Atlantic experiments after two preconditioning treatments

Cruise	Preconditioning treatment		Dark:light ratioa (%)
	In situ-simulated PAR (pmol Leu liter−1 h−1)	Dark (pmol Leu liter−1 h−1)
Incocéano-1	19.4	31.5	162**
	15.7	20.6	131**
	30.2	117.6	389
	20.8	52.7	253***
	9.5	13.6	143
	35.4	104.0	294**
	48.2	90.4	188**
	154.7	280.8	181**
	15.1	45.7	304**
Mean ± SE	38.8 ± 15.0	84.1 ± 27.5	227 ± 29
Incocéano-2	27.8	13.6	49
	27.1	21.2	78
	48.6	51.5	106
	262.9	731.5	278***
	1464.6	1112.2	76**
	401.2	338.0	84
	10.2	25.3	247
	32.0	47.2	147*
	44.6	62.6	140*
	164.1	109.0	66
	51.7	35.2	68
Mean ± SE	230.4 ± 128.9	231.6 ± 109.5	122 ± 23

^aThe average ratio of the value in dark bottle to that in the light bottle (expressed as a percentage) is given, with an indication of significant differences between in situ and dark data (t test) as follows: *, P < 0.05; **, P < 0.01; ***, P < 0.001.