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The uptake and distribution of copper in the lugworm, Arenicola marina (Annelida, polychaeta)
Everaarts, J.M. (1986). The uptake and distribution of copper in the lugworm, Arenicola marina (Annelida, polychaeta). Neth. J. Sea Res. 20(2-3): 253-267
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579, more
Peer reviewed article  

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Keyword
    Marine

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  • Everaarts, J.M.

Abstract
    The uptake and distribution of copper in the polychaetous worm Arenicola marina (L.) have been studied both under experimental conditions and in a natural environmental situation, by analyzing the whole body and three body-compartments: body-wall, intestine and blood. No relationship between the copper concentrations in various fractions of the sediment and any of the body-compartments could be found. Under experimental conditions, the copper concentrations in the blood were higher than in the intestine and the body-wall. Uptake of dissolved copper occurred directly from the water. Copper uptake also occurs via sediment at high copper concentrations of the silt fraction of the habitat sediment. The data obtained from the field showed small differences in copper concentrations between blood, intestine and body-wall. The copper concentrations in the blood varied from 1 to 4 µ·cm-3, in the intestine from 2 to 6 µg·g-1, and in the body-wall from 1 to 3 µg·g-1 wet weight. A significant correlation existed between blood copper concentration and body weight: small (young) individuals had higher copper concentrations in their blood than larger (older) ones. This means that young animals will encounter more stress at similar environmental copper levels than older animals. The concentration in the different body- compartments appears to be dependent on the season the samples were taken. The copper concentration in the intestine and the body decreased from April to November, whereas the blood copper concentration increased.

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