Distribution and toxicity of TCDD and 2,4,5-T in an aquatic model ecosystem

Yockim, R. S.; Isensee, Allan R.; Jones, Gerald E.

doi:10.1016/0045-6535(78)90073-5

Cited by 41 publications

(15 citation statements)

References 3 publications

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“…While mosquitofish have superior mouths suggesting a surface-feeding habit, their stomach contents (terrestrial and aquatic invertebrates and algal material) indicate that they feed more opportunistically (Pen et al, 1993). While there is conflicting evidence on the ability of poeciliids to bioconcentrate POPs (Yockim et al, 1978;Gobas, 1990;Ford and Hill, 1991;Freidig et al, 1998) it is possible that they are exposed to them through dietary mechanisms where sediment ΣPCB concentrations are elevated. The TCDDeq in the sediment was not correlated with the hepatic EROD activity suggesting that while some AhR ligands are bioavailable to the fish (through flux or dietary uptake), others may be either unavailable to benthic biota or do not bioconcentrate in them and, therefore, do not enter the food chain.…”

Section: Hepatic Cyp1a In Mosquitofish In Sop Wetlandsmentioning

confidence: 99%

“…They are less commonly used to examine the effects and exposure to POPs. POPexposed poeciliids bioconcentrate 2,3,7,8-TCDD (Yockim et al, 1978;Gobas, 1990) and certain PCB congeners (Freidig et al, 1998) but Ford and Hill (1991) found minimal bioconcentration of OCPs. Their small size, ease of capture and opportunistic feeding regime (Pen et al, 1993) makes them particularly suitable for such use.…”

Section: Use Of Mosquitofish In Determination Of In Vivo and In Situ mentioning

confidence: 99%

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Bioactivity of POPs and their effects in mosquitofish in Sydney Olympic Park, Australia

Rawson

Tremblay

Warne

et al. 2009

Science of The Total Environment

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a b s t r a c tThe site of the 2000 Olympic Games (Sydney Olympic Park (SOP), Sydney, Australia) was contaminated by persistent organic pollutants (POPs) prior to remediation in the 1990s. This study investigates the bioactivity of POPs in the sediment and water of wetlands across SOP by in vitro 2,3,7,8-TCDD equivalence (TCDDeq) measurement (H4IIE cell line bioassay). Further, it examines whether disturbance of these sediments is likely to mobilise ligands for this receptor into the water column. Exposure to aryl hydrocarbon receptor (AhR) ligands was measured in vivo using hepatic cytochrome P4501A (CYP1A) induction (EROD) in the mosquitofish (Gambusia holbrooki). Aqueous TCDDeq ranged from 0.013 to 0.057 pM in SOP wetlands which was significantly (p b 0.05) less that in urban reference sites. These concentrations were not correlated to physical or chemical characteristics of the wetlands. In the sediments, TCDDeq ranged from 0.0016 to 7.06 µg/kg and these were not significantly (p ≥ 0.05) different to that measured in urban reference sites. Simulated disturbance of small quantities of sediment in water samples significantly (p b 0.05) increased the levels of TCDDeq measured in the water. Sediment TCDDeq was correlated to sediment ΣPAH concentration in 2006 and sediment ΣPCB, ΣDDT concentrations and fine sediment grain size in 2005. While fish at one SOP wetland had hepatic EROD activity elevated above the estimated basal level for this species, these were at the lower end of the range measured in urban impacted, non-remediated wetlands. EROD activity was positively correlated with both the sediment ΣPCB load and aqueous TCDDeq. Increased catchment size was correlated with increased EROD activity suggesting an even spread of POPs throughout the residential areas of the Sydney metropolitan area. The concentration of bioactive POPs in the wetlands of SOP is therefore low relative to urban reference sites demonstrating the ongoing success of the remediation program..

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Section: Hepatic Cyp1a In Mosquitofish In Sop Wetlandsmentioning

confidence: 99%

Section: Use Of Mosquitofish In Determination Of In Vivo and In Situ mentioning

confidence: 99%

Bioactivity of POPs and their effects in mosquitofish in Sydney Olympic Park, Australia

Rawson

Tremblay

Warne

et al. 2009

Science of The Total Environment

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“…According to the report by Matsumura and Eknezet [4], TCDD was almost immobile in the soil, and it remains on the top-most layer. Yockim et al [7] monitored that soil TCDD levels decreased by 18% between one month and a half year. Isensee and Jones [5], on the other hand, concluded that TCDD accumulates in fish, which is controlled by the amount of TCDD available in water.…”

Section: Introductionmentioning

confidence: 99%

Fate of 2,3,7,8‐tetrachlorodibenzo‐P‐dioxin (TCDD) in an outdoor pond and in model aquatic ecosystems

Tsushimoto

Matsumura

Sago

1982

Enviro Toxic and Chemistry

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Environmental fate of TCDD was studied in an aquatic ecosystem, using an outdoor pond which had been dosed initially with 53.7 ppt of14C‐TCDD. The levels of radiocarbon reached an equilibrium in pondweeds after one month, in fish after two months and in the sediment after six months. Using the identical components from the outdoor pond, roughly comparable data were obtained in the laboratory for short‐term distribution of radiocarbon. The largest source of variance and discrepancy between the outdoor and the laboratory data was pondweeds. This material produced the largest shift in biomass due to rapid growth and subsequent massive death, causing a drastic change in distribution of radiocarbon in the second year in the outdoor ecosystem. The amounts of the total TCDD remaining in the pond after 12 and 25 months were 49.7 and 29.4%, respectively. The bulk of metabolites was detected in water and pondweeds.

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“…

Accumulation of four 14C-labeled polychlorinated dibenzo-p-dioxins (PCDDs), 1,2,3,7- T4CDD,1,2,3,4,1,2,3,4,7,and 1,2,3,4,6,7,, by juvenile rainbow trout (Salmo gairdneri) and fathead minnows (Pimephales promelas) was studied by feeding the fish treated food for 30 d followed by a 30-to 75-d depuration period. Assimilation efficiencies (based on total 14C) of the isomers were low, ranging from 13% for H7CDD to 37% for H&DD in trout, as compared with 64% for 4,4'-DDT under the same conditions.

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mentioning

confidence: 99%

Dietary Accumulation of Four Chlorinated Dioxin Congeners by Rainbow Trout and Fathead Minnows

Muir

Yarechewski

1988

Environ Toxicol Chem

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Accumulation of four 14C‐labeled polychlorinated dibenzo‐p‐dioxins (PCDDs), 1,2,3,7‐T4CDD, 1,2,3,4,7‐P5CDD, 1,2,3,4,7,8‐H6CDD, and 1,2,3,4,6,7,8‐H7CDD, by juvenile rainbow trout (Salmo gairdneri) and fathead minnows (Pimephales promelas) was studied by feeding the fish treated food for 30 d followed by a 30‐ to 75‐d depuration period. Assimilation efficiencies (based on total 14C) of the isomers were low, ranging from 13% for H7CDD to 37% for H6CDD in trout, as compared with 64% for 4,4′‐DDT under the same conditions. Bioaccumulation factors, assimilation efficiencies and elimination rate constants for each PCDD congener were lower in fathead minnows than in rainbow trout. Half‐lives for total 14C ranged from 9 to 13 d for T4CDD and P5CDD in trout and minnows, respectively, and from 46 to 112 d for H6CDD and H7CDD in the same fish. Toluene‐extractable radioactivity for T4CDD and P5CDD was less than 30% during the clearance phase, indicating extensive transformation to polar products in both species. A four‐compartment model was used to estimate the accumulation of H6CDD and H7CDD in Great Lakes food chains (from detritus/phytoplankton to lake trout). The model predicted decreasing concentrations of the PCDDs at higher trophic levels, with accumulation primarily from food, assuming freely dissolved water concentrations of less than 2 × 10−5 ng L−1.

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Distribution and toxicity of TCDD and 2,4,5-T in an aquatic model ecosystem

Cited by 41 publications

References 3 publications

Bioactivity of POPs and their effects in mosquitofish in Sydney Olympic Park, Australia

Bioactivity of POPs and their effects in mosquitofish in Sydney Olympic Park, Australia

Fate of 2,3,7,8‐tetrachlorodibenzo‐P‐dioxin (TCDD) in an outdoor pond and in model aquatic ecosystems

Dietary Accumulation of Four Chlorinated Dioxin Congeners by Rainbow Trout and Fathead Minnows

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