Nereis sp.

Within the phylum Annelida, polychaetes have shown a variation in their biokinetic behavior of Te not unlike that observed for molluscs and arthropods. Three species of polychaetes exposed to TcO.J in seawater for a period of 40 d exhibited concentration factors ranging between 10 for Arenicola marina and 1100 for Perinereis ciiltri-fera. Nereis diversicolor showed intermediate values of 100 and Nereis sp. concentration factors of more than 500 [89, 92]. 

Figure 1.10 Various Other Types of Protein-Saccharide Link. Many other types of protein-carbohydrate link are known. Structure (a) is common to many collagens, including those of mammals (b) is found in earthworm cuticular collagens and (c) is known from the collagen of Nereis sp. and related structures occur in earthworms.

Lee RF, Ryan C, Neuhauser ML (1976) Fate of petroleum hydrocarbons taken up from food and water by the blue crab Callinectes sapidus. Mar Biol 37 363-370 Lee RF, Furlong E, Singer S (1977) Metabolism of hydrocarbons in marine invertebrates aryl hydrocarbon hydroxylase from the tissues of the blue crab, Callinectes sapidus and the polychaete worm. Nereis sp. In Giam CS (1977) Pollutant effects on marine organisms. Lexington, Lexington, pp 111-124... 

Polychaete worms belonging to the genera Nereis and Scolecolepides have extensive metabolic potential. Nereis virens is able to metabolize PCBs (McElroy and Means 1988) and a nnmber of PAHs (McElroy 1990), while N. diversicolor and Scolecolepides viridis are able to metabolize benzo[a]pyrene (Driscoll and McElroy 1996). It is worth noting that apart from excretion of the toxicant, polar, and mnch more water-soluble metabolites such as the glycosides formed from pyrene by Porcellio sp. (Larsen et al. 1998) may be mobile in the interstitial water of the sediment phase. 

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