Table 1.

Experimental treatment conditions and Daphnia physiological responses

Treatment	Experimental conditions					Daphnia responses
	C:P, atomic (n = 3)	N:P, atomic (n = 3)	Cell mass, pg d.w. cell−1 (n = 4)	Cell volume, μm3 cell−1 (n = 15)	Algal MeHg concentration, ng Hg mg−1*(n = 3)	MeHg AE, %[n = 6 (HiQ), 5 (LoQ)]	MeHg efflux rate, d−1[n = 6 (HiQ), 5 (LoQ)]	tb½, d[n = 6 (HiQ), 5 (LoQ)]	Specific ingestion rate, mg mg−1 d−1[n = 36 (HiQ), 35 (LoQ)]	Specific growth rate, mg mg−1 d−1(n = 6)	Hg burden at day 5, %
HiQ	139 ± 14	15.25 ± 0.56	0.029 ± 0.004	150.29 ± 38.43	113.54 ± 0.56	96.02 ± 11.15	0.0415 ± 6 × 10−5	16.70 ± 0.03	1.296 ± 0.110	0.254 ± 0.011	16
LoQ	1,317 ± 174	91.84 ± 2.73	0.044 ± 0.006	156.50 ± 24.56	62.48 ± 0.54	94.75 ± 12.83	0.0413 ± 8 × 10−5	16.77 ± 0.03	1.694 ± 0.108	0.069 ± 0.004	34

Values are means ± SE.

*Algae MeHg concentrations were based on ng Hg mg⁻¹ dry weight after resuspension.