Table 3. Antioxidant defense and oxidative stress variables measured in Acartia sp. in August 2015.

Week I and II are separated by a thick border; CAT: Catalase, ORAC: Oxygen radical absorbance capacity, SOD: Superoxide dismutase, GR: Glutathione reductase, GST: glutathione S-transferase, totGSH: total glutathione, GSSG: oxidized glutathione, LPX: Lipid peroxidation, ND: under detection level, n: number of samples.

			Antioxidant defense						Oxidative stress
Date	Depth (m)		CAT (μmol min-1 mg-1)	ORAC (μM trolox equivalents mg-1)	SOD Inhibition (%)	GR (nmol min-1 mg-1)	GST (μmol min-1 mg-1)	totGSH (μM mg-1)	GSSG (μM mg-1)	LPX (μM cumene-hydroperoxide equivalents mg-1)
10 Aug.	20–30		7.59 ± 3.06	323.87 ± 168.32	57.65 ± 6.56	1.49	0.15 ± 0.04	26.86 ± 5.62	ND	33.49 ± 9.15
		n	2	3	3	1	3	3		3
11 Aug.	10–20		98.10	179.72	69.42	ND	0.20	33.85	ND	53.99
		n	1	1	1		1	1		1
13 Aug.	0–10		23.77 ± 2.08	353.21 ± 318.02	69.98 ± 4.59	1.69	0.21 ± 0.08	21.46 ± 2.02	ND	30.74 ± 7.09
		n	3	3	3	1	3	4		4
14 Aug.	15–25		17.69 ± 5.71	67.14 ± 23.32	59.23 ± 4.71	ND	0.09 ± 0.07	55.49 ± 24.46	3.81 ± 0.13	37.26 ± 5.38
		n	3	3	3		3	3	2	3
17 Aug.	20–30		17.69 ± 5.14	122.50 ± 23.46	53.17 ± 13.57	1.41	0.15 ± 0.04	27.83 ± 16.66	3.53	39.89 ± 11.59
		n	4	4	4	1	4	4	1	4
18 Aug.	10–20		13.75 ± 1.82	172.60 ± 99.50	50.45 ± 3.59	0.07	0.24 ± 0.01	60.42 ± 5.22	3.96 ± 0.49	29.75 ± 9.25
		n	3	3	3	1	3	3	3	3
20 Aug.	0–10		15.75 ± 5.23	128.26 ± 75.77	41.18 ± 3.98	4.12 ± 1.28	1.14 ± 0.54	38.34 ± 4.91	4.24 ± 0.33	30.22 ± 8.76
		n	2	3	3	3	3	3	3	3
21 Aug.	15–25		15.87 ± 4.33	146.63 ± 30.11	44.79 ± 11.40	4.56 ± 1.00	0.24 ± 0.06	41.65 ± 17.41	3.59 ± 2.04	34.08 ± 10.67
		n	4	4	4	3	4	4	4	4