LOSS OF ZN<sup>65</sup>FROM THE CALIFORNIA SEA-MUSSEL MYTILUS CALIFORNIANUS

Young, D. R.; Folsom, T.R.

doi:10.2307/1539838

Cited by 31 publications

(15 citation statements)

References 10 publications

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“…Depuration patterns for whole mussels (soft parts and shell) of the trace elements were characterized by 1 to 3 compartments, consistent with many previous observations in marine bivalves (Young & Folsom 1967, Dahlgaard 1981, Bjerregaard et al 1985. The first compartment was probably dominated by egestion of unassimilated materials and rapid desorption of surface bound rnatenal.…”

Section: Trace Element Effluxsupporting

confidence: 88%

Kinetic determinations of trace element bioaccumulation in the mussel Mytilus edulis

Wang¹,

Fisher²,

Luoma³

1996

Mar. Ecol. Prog. Ser.

404

402

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ABSTRACT. Laboratory experiments employing radiotracer methodology were conducted to determine the assimilation efficiencies from ingested natural seston, the influx rates from the dissolved phase and the efflux rates of 6 trace elements (Ag, Am, Cd, Co. Se and Zn) in the mussel Mytilus edulis. A kinetic model was then employed to predict trace element concentration in mussel tissues in 2 locations for which mussel and environmental data are well described: South San Francisco Bay (California, USA) and Long Island Sound [New York, USA). Assimilation efficiencies from natural seston ranged from 5 to 18": for Ag, 0.6 to 1% for Am, 8 to 20% for Cd, 12 to 16% for CO, 28 to 34% for Se, and 32 to 41 ' :, for Zn. Differences in chlorophyll a concentration in ingested natural seston did not have significant impact on the assimilation of Am, CO, Se and Zn. The influx rate of elements from the dissolved phase increased with the dissolved concentration, conforming to Freundlich adsorption isotherms. The calculated dissolved uptake rate constant was greatest for Ag, followed by Zn > Am -; Cd > CO > Se. The estimated absorption efficiency from the d~ssolved phase was 1.53 % for Ag, 0.34 % for Am, 0.31 X for Cd, 0.11 % for CO, 0.03"' for Se and 0.89% for Zn. Salinity had an inverse effect on the influx rate from the dissolved phase and dissolved organic carbon concentration had no significant effect on trace element uptake. The calculated efflux rate constants for all elements ranged from 1.0 to 3.0% d-' The route of trace element uptake (food vs dissolved) and the duration of exposure to dissolved trace elements (12 h vs 6 d) did not significantly influence trace element efflux rates. A model which used the experimentally determined influx and efflux rates for each of the trace elements, following exposure from ingested food and from water, predicted concentrations of Ag. Cd, Se and Zn in mussels that were directly comparable to actual tissue concentrations independently measured in the 2 reference sites in national monitoring programs. Sensitivity analysis indicated that the total suspended solids load, which can affect mussel feeding activity, assimilation, and trace element concentration in the dissolved and particulate phases, can significantly influence metal bioaccumulation for particlereactive elements such as Ag and Am. For all metals, concentrations in mussels are proportionately related to total metal load in the water column and their assimilation efficiency from ingested particles. Further, the model predicted that over 96% of Se in mussels is obtained from ingested food, under conditions typical of coastal waters. For Ag, Am, Cd, CO and Zn, the relative contribution from the dissolved phase decreases significantly with increasing trace element parhtion coefficients for suspended particles and the assimilation efficiency in mussels of ingested trace elements, values range between 33 and 67% for Ag, 5 and 1 7 % for Am, 47 and 82% for Cd, 4 and 30% for CO, and 17 and 51 ?h for Zn.

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Section: Trace Element Effluxsupporting

confidence: 88%

Kinetic determinations of trace element bioaccumulation in the mussel Mytilus edulis

Wang¹,

Fisher²,

Luoma³

1996

Mar. Ecol. Prog. Ser.

404

402

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“…Its radioisotope, the neutron-induced radionuclide 65 Zn, is also released into the sea in significant quantities. Many radiological studies have therefore been carried out both on the uptake of 65 Zn by Mytilus (Boroughs, Chipman & Rice, 1957;Brooks & Rumsby, 1965;Chipman, Rice & Price, 1958;Kameda, Shimizu & Hiyama, 1968;Keckes, Ozretic & Krajnovic, 1969;Pentreath, 1973;Van Weers, 1973) and its loss from contaminated animals (Foulquier & Baudhuin, 1976;Keckes, Ozretic & Krajnovic, 1968;Seymour & Nelson, 1973'•> Van Weers, 1973Young & Folsom, 1967). Other studies have been oriented towards the use of Mytilus as an indicator organism by comparison of water and animal zinc concentrations at different collection sites (e.g.…”

Section: Introductionmentioning

confidence: 99%

Metabolism of zinc in the mussel, Mytilus edulis (L.): a combined ultrastructural and biochemical study

1980

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The uptake, transport, storage and excretion of zinc has been studied in Mytilus edulis. Zinc accumulates in the soft tissues in proportion to its concentration in sea water whilst the concentration in the haemolymph is little above that in the environment. Uptake is via the gut, mantle and gills. The zinc is transported from the gills and gut (t½ ≈ 8 days) via the haemolymph, either as a high molecular weight complex or in the granular amoebocytes, to the kidney. Most of the body zinc is present in the granular amoebocytes (which are found in all the body tissues) or in the gut and kidney. The kidney forms the major storage organ for many trace metals, containing 30% of the body zinc and a concentration of about 1000 μg/g. Zinc is localized as insoluble granules in membranelimited vesicles occupying some 20% of the cell volume. Excretion of zinc is by defaecation, exocytosis of the kidney granules into the urine and diapedesis of the amoebocytes. A multicompartmental model for zinc metabolism which correlates the ultrastructural and kinetic data is proposed.

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“…is widespread in the marine environment and has been detected in various organisms by many investigators (Robertson, 1968;Folsom, et al, 1963;McCauley, 1971;Nagata and Folsom, 1954;Osterberg, et al, 1964;Perkins, et al, 1960;Watson, et al, 1961;Wolfe, 1970;Young and Folsom, 1967 Zn by diatoms and Chelex-100 chelating resin occurred at different rates, and that equilibration between the zinc and the 65 Zn was slow relative to biological uptake (see Figure 3). The obvious explana-65 tion is that the zinc and Zn were present in the seawater culture medium in Zn from the crabs.…”

Section: Zinc -^^Znmentioning

confidence: 96%

Influence of the Physico-Chemical Forms of Radionuclides and Stable Trace Elements in Seawater in Relation to Uptake by the Marine Biosphere.

Robertson¹

1971

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LOSS OF ZN⁶⁵FROM THE CALIFORNIA SEA-MUSSEL MYTILUS CALIFORNIANUS

Cited by 31 publications

References 10 publications

Kinetic determinations of trace element bioaccumulation in the mussel Mytilus edulis

Kinetic determinations of trace element bioaccumulation in the mussel Mytilus edulis

Metabolism of zinc in the mussel, Mytilus edulis (L.): a combined ultrastructural and biochemical study

Influence of the Physico-Chemical Forms of Radionuclides and Stable Trace Elements in Seawater in Relation to Uptake by the Marine Biosphere.

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LOSS OF ZN65FROM THE CALIFORNIA SEA-MUSSEL MYTILUS CALIFORNIANUS

Cited by 31 publications

References 10 publications

Kinetic determinations of trace element bioaccumulation in the mussel Mytilus edulis

Kinetic determinations of trace element bioaccumulation in the mussel Mytilus edulis

Metabolism of zinc in the mussel, Mytilus edulis (L.): a combined ultrastructural and biochemical study

Influence of the Physico-Chemical Forms of Radionuclides and Stable Trace Elements in Seawater in Relation to Uptake by the Marine Biosphere.

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LOSS OF ZN⁶⁵FROM THE CALIFORNIA SEA-MUSSEL MYTILUS CALIFORNIANUS