Table 2.

Summary of habitat-specific diet scenario conditions and the predicted effects on fish Hg accumulation.

Diet variables			Fish responses
Diet composition %	Prey energy density (J g⁻¹ w.w.)^a	Prey Hg ± SE(ng g⁻¹)^b	Fish Hg (mg kg⁻¹ w.w.)^c	Hg uptake (mg)^c	Specific consumption rate (J g⁻¹ d⁻¹)^c	Specific growth rate (J g⁻¹ d⁻¹)^c	Specific respiration rate (%)(J g⁻¹ d⁻¹)^c
Benthic diet
Libellulids (48)	4284	134 ± 31
Gastropods (22)	1807	205 ± 70
Chironomids (19)	2756	115 ± 14
Coenagrionids (7)	3365	188 ± 41
Amphipods (4)	3924	88 ± 19
MEAN (Min Hg, Max Hg)	3370	148 (111, 184)	0.14 (0.11, 0.17)	0.02 (0.01, 0.03)	202	63	62
Cladoceran-dominated pelagic diet
Cladocerans (75)	2202	380 ± 61
Copepods (25)	2310	152 ± 25
MEAN (Min Hg, Max Hg)	2229	323 (271, 375)	0.40 (0.33, 0.46)	0.05 (0.04, 0.06)	134	21	61
Copepod-dominated pelagic diet
Cladocerans (25)	2202	380 ± 61
Copepods (75)	2310	152 ± 25
MEAN (Min Hg, Max Hg)	2283	209 (175, 243)	0.25 (0.21, 0.29)	0.03 (0.03, 0.04)	137	23	61
Mixed diet
Benthic Prey (50)
Libellulids (24)	4284	134 ± 31
Gastropods (11)	1807	205 ± 70
Chironomids (9.5)	2756	115 ± 14
Coenagrionids (3.5)	3365	188 ± 41
Amphipods (2)	3924	88 ± 19
Pelagic Prey (50)
Cladocerans (37.5)	2202	380 ± 61
Copepods (12.5)	2310	152 ± 25
MEAN (Min Hg, Max Hg)	2800	235 (191, 280)	0.25 (0.22, 0.28)	0.04 (0.03, 0.04)	168	42	61

Prey energy density values from (Cummins and Wuycheck, 1971) and converted using dry weight: wet mass ratios from (Dumont et al., 1975) (Dumont et al., 1975) for zooplankton, (McPeek et al., 2001) (McPeek et al., 2001) for coenagrionids and assumed to be 0.2 for libellulids (Cummins and Wuycheck, 1971) (Cummins and Wuycheck, 1971).

Prey Hg values are from Table 1. See Methods for calculations of cladoceran and copepod values.

At 3.3 g wet weight.