Bioaccumulation of trace metals in Greenland Sea copepod and amphipod collectives on board ship: verification of toxicokinetic model parameters

Ritterhoff, Jürgen; Zauke, Gerd‐Peter

doi:10.1016/s0166-445x(97)00044-1

Cited by 35 publications

(20 citation statements)

References 32 publications

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“…The relatively low Cu concentrations in egg samples of decapods found in the present study, but also in juvenile amphipods, support the hypothesis that the enzymatic requirements and haemocyanin component demand for Cu in early life-history stages are probably not met without a distinct bioaccumulation of this essential element after hatching. This view is supported by the fact that for many amphipods from temperate or polar waters a high potential for bioaccumulation of copper was reported on the basis of toxicokinetic studies, yielding the following bioconcentration factors (BCFs): 1400 (Themisto abyssorum; Greenland Sea; RITTERHOFF and ZAUKE, 1997a;RITTERHOFF and ZAUKE, 1997b); Table 5. Interspecific heterogeneities of cadmium, copper and zinc in crustaceans from the Weddell Sea (Jan-Feb 1999).…”

Section: Intraspecific Heterogeneities Of Metals In Crustaceansmentioning

confidence: 92%

Significance and Interspecific Variability of Accumulated Trace Metal Concentrations in Antarctic Benthic Crustaceans

Keil

Broyer

Zauke³

2008

International Review of Hydrobiology

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Trace metals (Cd, Cu, Pb and Zn) were analysed in crustaceans collected on Polarstern cruises ANT XVI/2 (1999) and ANT XXI/2 (2003/04, BENDEX) to the Weddell Sea. Our study provides further evidence for the frequently reported "Cd anomaly" in polar crustaceans, with data ranging from 1. N. antarcticus) or juveniles in the brood pouch of an amphipod species to adult females indicate that the enzymatic requirements and haemocyanin component demand for Cu in early life-history stages is probably not met without a distinct bioaccumulation of this essential element after hatching. Most interestingly, Cd also increases (< 0.1 vs. 6.2 mg kg -1 in N. antarcticus). This could be the consequence of efficient uptake mechanisms for Cu that cannot discriminate between this element and Cd. Cu and Zn concentrations in decapods of this study are largely within the range reported worldwide (40-90 mg Cu kg -1 and 40-80 mg Zn kg -1 ), indicating that these elements are regulated. The enormous heterogeneity of Cd and Zn in many amphipod species investigated (e.g., from 0.6 in Gnathiphimedia mandibularis to 34.4 mg Cd kg -1 in Orchomenopsis acanthura and from 41 in Eusirus antarcticus to 1244 mg Zn kg -1 in Iphimediella bransfieldi) supports the hypothesis of the "Cd anomaly" and suggests that there is probably no consistent metabolic demand for the essential element Zn in this taxonomic group. The heterogeneity of Cu in amphipods is less pronounced.

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Section: Intraspecific Heterogeneities Of Metals In Crustaceansmentioning

confidence: 92%

Significance and Interspecific Variability of Accumulated Trace Metal Concentrations in Antarctic Benthic Crustaceans

Keil

Broyer

Zauke³

2008

International Review of Hydrobiology

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“…The linear prediction of Pb (Fig. 3a, thick black line) with the reported parameter values from T1 (Ritterhoff & Zauke, 1997b) does not match the observed data for independent experiments T2 (Ritterhoff & Zauke, 1997a) regarding the complete range of exposures, while a model fit with Eq. 6 (corr-2C-M-eq-6) gives a fair description of the data (A = 590, B = -0.21).…”

Section: Resultsmentioning

confidence: 70%

“…Thus, predictions can be obtained for a concentration-dependent experiment with t as constant (the duration of the uptake experiment), referred to as T2, or for a time-dependent experiment with C W as constant (referred to as T3) (e.g., Clason et al, 2004a;Clason & Zauke, 2000;Ritterhoff & Zauke, 1997a).…”

Section: Verification Of Toxicokinetic Modelsmentioning

confidence: 99%

“…This is because an experimental setup integrating all relevant factors involved would become far too complex to be practicable. For evaluation of an organism's potential for biomonitoring, this method is nevertheless adequate and has often been used in studies with aquatic invertebrates, but, the verification of estimated model parameters is imperative for this approach (e.g., Clason & Zauke, 2000;Ritterhoff & Zauke, 1997a;Zauke et al, 1996 and literature cited therein).…”

Section: Introductionmentioning

confidence: 99%

“…In this case, a verification or extrapolation of (linear) model predictions derived from first-order kinetics will only be successful for the lower range of exposure concentrations, in which the uptake process does not limit the rate of uptake (Bernds et al, 1998;Clason & Zauke, 2000;Ritterhoff & Zauke, 1997a). Otherwise, predictions derived from compartment models must be adjusted, taking into account any nonlinear relationship between kinetic parameters such as k 1 , k 2 , or BCF and the exposure to metals externally ðC W i Þ, as previously described by Clason et al (2004a).…”

Section: Introductionmentioning

confidence: 99%

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Toxicokinetic models as predictive tools in biomonitoring metals in zooplankton: a synthesis of ideas

Zauke

2008

Hydrobiologia

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The power of size. 2. Rate constants and equilibrium ratios for accumulation of inorganic substances related to species weight

Hendriks¹,

Heikens²

2001

Enviro Toxic and Chemistry

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Most of the thousands of substances and species that risk assessment has to deal with are not investigated empirically because of financial, practical, and ethical constraints. To facilitate extrapolation, we have developed a model for concentration kinetics of inorganic substances as a function of the exposure concentration of the chemical and the weight and trophic level of the species. The ecological parameters and the resistances that substances encounter during diffusion in water layers were obtained from previous reviews. The other chemical parameters (the resistances for permeation of lipid layers) were calibrated in the present study on 1,062 rate constants for absorption from water, for assimilation from food, and for elimination. Data on all elements and species were collected, but most applied to aquatic species, in particular mollusks and fish, and to transition metals, in particular group IIB (Zn, Cd, Hg). Their ratio was validated on 92 regressions and nine geometric averages, representing thousands of (near-)equilibrium accumulation ratios from laboratory and field studies. Rate constants for absorption and elimination decreased with species weight at an exponent of about -0.25, known from ecological allometry. On average, uptake-rate constants decreased with about the reciprocal square root of the exposure concentration. About 71 and 30% of the variation in absorption and elimination was explained by the model, respectively. The efficiency for assimilation of elements from food appeared to be determined mainly by the food digestibility and the distribution over egested and digested fractions. (Near-)equilibrium accumulation and magnification ratios also decreased with the reciprocal square root of the exposure concentration. The level of the organism-solids concentrations ratios roughly varied between one and two orders of magnitude, depending on the number of elements and species groups investigated. Metal concentrations did not increase at higher trophic levels, with the exception of (methyl-)mercury. Organism-solids concentration ratios for terrestrial species tended to be somewhat lower than those for their aquatic equivalents. Food web accumulation, expressed as organism-organic solids and organism-food concentrations ratios, can therefore be only partly explained by ecological variables. The model is believed to facilitate various types of scientific interpretation as well as environmental risk assessment.

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Bioaccumulation of trace metals in Greenland Sea copepod and amphipod collectives on board ship: verification of toxicokinetic model parameters

Cited by 35 publications

References 32 publications

Significance and Interspecific Variability of Accumulated Trace Metal Concentrations in Antarctic Benthic Crustaceans

Significance and Interspecific Variability of Accumulated Trace Metal Concentrations in Antarctic Benthic Crustaceans

Toxicokinetic models as predictive tools in biomonitoring metals in zooplankton: a synthesis of ideas

The power of size. 2. Rate constants and equilibrium ratios for accumulation of inorganic substances related to species weight

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